ECHELON CORP
424B1, 1998-07-28
PREPACKAGED SOFTWARE
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<PAGE>

                                                Filed Pursuant to Rule 424(b)(1)
                                                      Registration No. 333-55719
 
                               5,000,000 SHARES
 
                               [LOGO OF ECHELON]
 
                                 COMMON STOCK
 
  All of the shares of Common Stock offered hereby are being sold by Echelon
Corporation ("Echelon" or the "Company"). Prior to this offering, there has
been no public market for the Common Stock of the Company. See "Underwriting"
for a discussion of the factors to be considered in determining the initial
public offering price. The Company's Common Stock has been approved for
quotation on the Nasdaq National Market under the symbol ELON.
 
  THIS OFFERING INVOLVES A HIGH DEGREE OF RISK. SEE "RISK FACTORS" COMMENCING
ON PAGE 5 FOR A DISCUSSION OF CERTAIN FACTORS THAT SHOULD BE CONSIDERED BY
PROSPECTIVE PURCHASERS OF THE COMMON STOCK OFFERED HEREBY.
 
                                  -----------
 
     THESE  SECURITIES  HAVE  NOT  BEEN APPROVED  OR DISAPPROVED BY THE  
       SECURITIES  AND  EXCHANGE  COMMISSION  OR  ANY STATE SECURITIES 
        COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR 
          ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY  
            OR ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION  
                TO  THE  CONTRARY  IS  A  CRIMINAL  OFFENSE.
 
<TABLE>
<CAPTION>
================================================================================
                                               Price to Underwriting Proceeds to
                                                Public  Discount(1)  Company(2)
- --------------------------------------------------------------------------------
<S>                                         <C>         <C>          <C>
Per Share..................................    $7.00       $0.49        $6.51
- --------------------------------------------------------------------------------
Total(3)................................... $35,000,000  $2,450,000  $32,550,000
================================================================================
</TABLE>
(1) See "Underwriting" for information concerning indemnification of the
    Underwriters and other matters.
 
(2) Before deducting offering expenses payable by the Company estimated at
    $700,000.
 
(3) The Company has granted to the Underwriters a 30-day option to purchase up
    to 750,000 additional shares of Common Stock solely to cover over-
    allotments, if any. If the Underwriters exercise this option in full, the
    Price to Public will total $40,250,000, the Underwriting Discount will
    total $2,817,500 and the Proceeds to Company will total $37,432,500. See
    "Underwriting."
 
  The shares of Common Stock are offered by the several Underwriters named
herein, subject to receipt and acceptance by them and subject to their right
to reject any orders in whole or in part. It is expected that delivery of the
certificates representing such shares will be made against payment therefor at
the office of NationsBanc Montgomery Securities LLC, on or about July 31,
1998.
 
                                  -----------
 
NationsBanc Montgomery Securities LLC
                        BancAmerica Robertson Stephens
                                                   Volpe Brown Whelan & Company
 
                                 July 27, 1998
<PAGE>
 
                                                            [LOGO APPEARS HERE]
 
CAPTION: A GLOBAL STANDARD FOR CONTROL NETWORKS
 
[Photographs and brief description depicting industries that use the Company's
                                   products]
 
 [Schematic depicting the transition from closed systems to open, distributed
                                   networks]
 
CAPTION: Delivering Control to Your Networks
 
  CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE COMMON STOCK
OFFERED HEREBY. SUCH TRANSACTIONS MAY INCLUDE STABILIZING, THE PURCHASE OF
COMMON STOCK TO COVER SYNDICATE SHORT POSITIONS AND THE IMPOSITION OF PENALTY
BIDS. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."
 
  Echelon, LonBuilder, LonMaker, LonMark, LonPoint, LonTalk, LonUsers,
LonWorks, Neuron and NodeBuilder are trademarks, registered trademarks,
service marks or registered service marks of the Company. This Prospectus also
includes product names, trade names and trademarks of other companies.
<PAGE>
 
HEADLINE:
                     LONWORKS(C) CONTROL NETWORK SOLUTIONS
                     OPEN OPPORTUNITIES IN MANY INDUSTRIES
 
Caption: Echelon offers products and services that provide the infrastructure
and support required to build and implement multi-vendor, distributed control
network solutions for building, industrial, transportation, home, and other
automation markets. The Company's products are based on its LONWORKS
networking technology, an open standard for interoperable networked control.
 
[GRAPHIC DEPICTING CLOSED CENTRAL ARCHITECTURE]
Caption: Traditional closed, centrally-controlled architecture
 
[GRAPHIC DEPICTING COMMERCIAL BUILDINGS]
BUILDING AUTOMATION
Companies worldwide are using LONWORKS control networks in most facets of the
building automation industry, including access control, automatic doors,
elevators, energy management, fire/life/safety, HVAC, lighting, metering,
security and window blinds.
 
[GRAPHIC DEPICTING OPEN CONTROL NETWORK]
Open interoperable, distributed control network
 
[GRAPHIC DEPICTING RESIDENCES]
HOME AUTOMATION AND UTILITIES
Companies are now selling LONWORKS based products for HVAC, lighting,
security, utility meters and whole house automation.
 
[GRAPHIC DEPICTING INDUSTRIAL COMPLEXES]
INDUSTRIAL AUTOMATION
LONWORKS control networks are found in semiconductor fabrication plants,
gasoline tank farms, oil pumping stations, textile dyeing machinery, pulp and
paper processing equipment, automated conveyor systems and many other
industrial environments.
 
[GRAPHIC DEPICTING AIRPLANE, SHIP AND TRAIN]
TRANSPORTATION
LONWORKS control networks are used in important transportation applications,
including railcars, light rail systems, buses, motor coaches, fire trucks,
naval vessels and aircraft.
 
[SIDEBAR]
Echelon's LONWORKS control network solutions can provide customers with the
following benefits over closed, centrally-controlled systems:
 
 . Installation cost savings - replaces individual hard-wired connections with
shared network resources and eliminates complex control logic software
programming and debugging
 
 . Life-cycle cost savings - allows end-users to select the most cost-effective
products and services for their applications and simplifies adds, moves and
changes
 
 . Improved quality and functionality - enables end-users to create tailored
applications and have complete access to information from devices
 
 . Improved reliability - eliminates single point of failure since all devices
are "self aware" and can take appropriate actions independently
 
 . Increased market demand - enables OEMs and and systems integrators to create
low-cost, customized solutions to satisfy market demands not met by
traditional control systems
 
                                                                         [LOGO]
<PAGE>
 
                               PROSPECTUS SUMMARY
 
  The following summary is qualified in its entirety by the more detailed
information, including "Risk Factors" and the Consolidated Financial Statements
and Notes thereto, appearing elsewhere in this Prospectus. This Prospectus
contains certain forward-looking statements that involve risks and
uncertainties, such as statements of the Company's plans, objectives,
expectations and intentions, and actual results may differ materially from
those anticipated in such forward-looking statements. Unless otherwise noted,
all information in this Prospectus assumes (i) the conversion of all
outstanding shares of the Company's Preferred Stock into Common Stock on a one-
for-one basis upon the closing of this offering and (ii) no exercise of the
Underwriters' over-allotment option. As used in this Prospectus, unless the
context otherwise requires, the "Company" and "Echelon" refer to the Company
and its subsidiaries.
 
                                  THE COMPANY
 
  Echelon develops, markets and supports a family of hardware and software
products and services that enables original equipment manufacturers ("OEMs")
and systems integrators to design and implement open, interoperable,
distributed control networks. A control network enables any group of electrical
devices, called nodes, to be linked together to implement sensing, monitoring,
control and communications capabilities for a variety of applications. Control
networks, an alternative to the traditional approach of centralized control,
offer decreased costs of installation and maintenance and the ability to
implement multi-vendor systems, thereby increasing competition while providing
expanded features, flexibility and functionality. Echelon's control networking
technology allows intelligence and communications capabilities to be embedded
into individual control devices that can be connected together through a
variety of communications media, such as a twisted pair of wires (data cable)
and the existing power lines in a facility. The intelligent, networked control
devices are then able to communicate with each other, peer-to-peer, to perform
the desired control functions. In effect, the network becomes the controller,
eliminating the need for central controllers, significantly reducing wiring
costs and enhancing system functionality and flexibility.
 
  Control systems manage key functions in virtually every type of facility that
affects our daily lives. These functions can be as simple as turning a light on
and off and as complex as operating a chemical production line. Traditionally,
most control systems have incorporated closed, centrally-controlled
architectures, where the intelligence is in the central controller and complex
wiring and customization are required for communication. These traditional
control systems share many of the same drawbacks of centralized computing
architectures that rely upon mainframes and minicomputers to communicate to
"dumb" terminals that lack independent processing capabilities. These
disadvantages, which include high installation and life-cycle costs, limited
functionality and scalability, and a single point of failure, have limited the
market opportunity for control systems because end-users find it costly and
difficult to adapt these systems to their changing needs. To overcome these
limitations, OEMs, systems integrators and end-users are increasingly moving
from closed centrally-controlled systems towards open, distributed control
networks.
 
  The Company offers a comprehensive set of products and services, including
transceivers, control modules, routers, network interfaces, development tools
and software tools and toolkits, that provide the infrastructure and support
required to build and implement multi-vendor, open, interoperable, control
network solutions. The Company's products are based on its LonWorks networking
technology, an open standard for interoperable networked control. The Company's
objective is to establish its LonWorks technology and products as the leading
solution for networked control applications. To achieve this goal, the Company
intends to extend its technological expertise, target industry-leading OEM
customers, develop a systems integrator distribution channel, integrate
LonWorks control networks with enterprise data networks and leverage
international market opportunities.
 
  The Company markets its products and services to OEMs and systems integrators
in the building, industrial, transportation, home and other automation markets.
The Company sells primarily through a direct sales force in North America and
other countries where it has operations, and augments its direct sales efforts
with distributors in Europe, Japan and Asia Pacific. Representative customers
include Bombardier Inc. ("Bombardier"), Edwards High Vacuum International Ltd.
("Edwards"), Fuji Electric Company Limited ("Fuji Electric"), Hitachi Limited
("Hitachi"), Honeywell, Inc. ("Honeywell"), Johnson Controls, Inc. ("Johnson
Controls"), Kawasaki Limited ("Kawasaki"), Landis & Staefa, Staefa Control
System Corporation ("Landis & Staefa") and Raytheon Company ("Raytheon").
 
  The Company was incorporated in California in 1988 and reincorporated in
Delaware in 1989. The Company's principal executive offices are located at 4015
Miranda Avenue, Palo Alto, California 94304, and its telephone number is (650)
855-7400.
 
                                       3
<PAGE>
 
                                  THE OFFERING
 
<TABLE>
 <C>                                            <S>
 Common Stock offered by the Company..........  5,000,000 shares
 Common Stock to be outstanding after the of-
  fering......................................  32,125,612 shares(1)
 Use of proceeds..............................  For general corporate purposes,
                                                including working capital and
                                                capital expenditures. See "Use
                                                of Proceeds."
 Nasdaq National Market symbol................  ELON
</TABLE>
 
                   SUMMARY CONSOLIDATED FINANCIAL INFORMATION
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                           THREE MONTHS
                                                                               ENDED
                                   YEAR ENDED DECEMBER 31,                   MARCH 31,
                          ----------------------------------------------  ----------------
                            1993      1994     1995      1996     1997     1997     1998
                          --------  --------  -------  --------  -------  -------  -------
CONSOLIDATED STATEMENT OF OPERATIONS DATA:                                  (UNAUDITED)
<S>                       <C>       <C>       <C>      <C>       <C>      <C>      <C>
 Revenues:
 Product................  $ 10,104  $ 14,368  $20,183  $ 20,708  $24,665  $ 6,548  $ 7,188
 Service................     1,441     2,364    3,160     3,282    3,637      926      771
                          --------  --------  -------  --------  -------  -------  -------
 Total revenues.........    11,545    16,732   23,343    23,990   28,302    7,474    7,959
 Gross profit...........     6,791     8,993   12,768    12,087   14,731    3,908    4,167
 Loss from operations...   (11,273)  (10,250)  (9,854)  (10,937)  (8,522)  (1,944)  (1,757)
 Net loss...............  $(11,133) $ (9,483) $(8,713) $(10,716) $(8,214) $(1,907) $(1,737)
 Basic net loss per
  share(2)..............  $  (0.85) $  (0.67) $ (0.56) $  (0.62) $ (0.44) $ (0.10) $ (0.09)
 Shares used in comput-
  ing basic net loss per
  share(2)..............    13,038    14,060   15,695    17,354   18,603   18,511   19,029
 Pro forma basic net
  loss per share(2).....                                         $ (0.32) $ (0.08) $ (0.06)
 Shares used in comput-
  ing pro forma basic
  net loss per
  share(2)..............                                          25,756   24,399   26,916
</TABLE>
 
<TABLE>
<CAPTION>
                                                               MARCH 31, 1998
                                                             -------------------
                                                                         AS
                                                             ACTUAL  ADJUSTED(3)
                                                             ------- -----------
                                                                 (UNAUDITED)
<S>                                                          <C>     <C>
CONSOLIDATED BALANCE SHEET DATA:
 Cash and cash equivalents.................................. $ 5,165   $37,015
 Working capital............................................   7,376    39,226
 Total assets...............................................  15,695    47,545
 Total stockholders' equity.................................   7,482    39,332
</TABLE>
- --------
(1) Based on shares outstanding as of March 31, 1998. Includes 1,802,438 shares
    of Common Stock issued under stock purchase agreements subject to
    repurchase by the Company at a weighted average price of $1.26 per share.
    Excludes (i) 4,082,695 shares of Common Stock issuable upon exercise of
    options outstanding as of March 31, 1998 at a weighted average exercise
    price of $1.33 per share, of which options to purchase 3,932,695 shares
    (including 3,167,780 shares were subject to repurchase by the Company at a
    weighted average exercise price of $1.31 per share) were exercisable, (ii)
    3,942,700 shares of Common Stock reserved for future issuance under the
    Company's stock option plans and (iii) 430,000 shares of Common Stock
    issuable upon exercise of warrants outstanding as of March 31, 1998 at a
    weighted average exercise price of $5.49 per share. See "Management--Stock
    Option Plans and Warrants," "Description of Capital Stock" and Note 6 of
    Notes to Consolidated Financial Statements.
(2) See Note 2 of Notes to Consolidated Financial Statements for an explanation
    of the shares used in computing basic net loss per share and pro forma
    basic net loss per share.
(3) Adjusted to reflect (i) the conversion of all outstanding shares of
    Preferred Stock into Common Stock on a one-for-one basis upon the closing
    of this offering and (ii) the sale of the 5,000,000 shares of Common Stock
    offered hereby (at the initial public offering price of $7.00 per share and
    after deducting the underwriting discount and estimated offering expenses
    payable by the Company). See "Capitalization."
 
                                       4
<PAGE>
 
                                 RISK FACTORS
 
  This offering involves a high degree of risk. In addition to the other
information set forth in this Prospectus, the following risk factors should be
considered carefully in evaluating the Company and its business before
purchasing any shares of the Company's Common Stock. This Prospectus contains
certain forward-looking statements that involve risks and uncertainties, such
as statements of the Company's plans, objectives, expectations and intentions.
The cautionary statements made in this Prospectus should be read as being
applicable to all related forward-looking statements wherever they appear in
this Prospectus. The Company's actual results could differ materially from
those discussed in this Prospectus. Factors that could cause or contribute to
such differences include those discussed below, as well as those discussed
elsewhere in this Prospectus.
 
HISTORY OF LOSSES; ACCUMULATED DEFICIT; ANTICIPATED CONTINUING LOSSES;
UNCERTAINTY OF FUTURE OPERATING RESULTS
 
  The Company has incurred net losses each year since its inception, including
losses of $8.7 million, $10.7 million and $8.2 million for the fiscal years
ended December 31, 1995, 1996 and 1997, respectively. At March 31, 1998, the
Company had an accumulated deficit of $86.4 million. The Company has invested
and continues to invest significant financial resources in product
development, marketing and sales, and to the extent such expenditures do not
result in significant increases in revenues, the Company's business, operating
results and financial condition will be materially and adversely affected. Due
to the limited history and undetermined market acceptance of many of the
Company's products and technologies, the rapidly evolving nature of the
Company's business and markets, potential changes in voluntary product
standards that significantly influence many of the markets for the Company's
products, the high level of competition in the industries in which the Company
operates and the other factors described elsewhere in "Risk Factors," there
can be no assurance that the Company's investment in these areas will result
in increases in revenues or that any revenue growth that is achieved can be
sustained. Any revenue growth that the Company has achieved or may achieve may
not be indicative of future operating results. In addition, the Company's
history of losses, together with the factors described under "--Fluctuations
in Operating Results," make future operating results difficult to predict. The
Company and its prospects must be considered in light of the risks, costs and
difficulties frequently encountered by emerging companies. As a result, there
can be no assurance that the Company will be profitable in any future period.
Future operating results will depend on many factors, including the growth of
the markets for the Company's products, the acceptance of the Company's
products, the level of competition, the ability of the Company to develop and
market new products, and general economic conditions. In view of the
uncertainties identified herein, the Company believes that period-to-period
comparisons of financial results are not necessarily meaningful and should not
be relied upon as an indication of future performance. As of December 31,
1997, the Company had net operating loss carryforwards for Federal and state
income tax reporting purposes of approximately $76.0 million and $5.0 million,
respectively, which expire at various dates through 2012. In addition, as of
December 31, 1997, the Company had tax credit carryforwards of approximately
$3.5 million, which expire at various dates through 2012. The Internal Revenue
Code of 1986, as amended, contains provisions that may limit the use in any
future period of net operating loss and credit carryforwards upon the
occurrence of certain events, including a significant change in ownership
interests. The Company had deferred tax assets, including its net operating
loss carryforwards and tax credits, totaling approximately $33.6 million as of
December 31, 1997. A valuation allowance has been recorded for the entire
deferred tax asset as a result of uncertainties regarding the realization of
the asset balance, the history of losses and the variability of operating
results. See "--Fluctuations in Operating Results," "Management's Discussion
and Analysis of Financial Condition and Results of Operations" and Note 7 of
Notes to Consolidated Financial Statements.
 
FLUCTUATIONS IN OPERATING RESULTS
 
  The Company has experienced, and expects to continue to experience,
significant variability in its quarterly and annual results, as a result of a
number of factors, many of which are outside of the Company's control. The
 
                                       5
<PAGE>
 
Company believes that such variability is primarily due to the fluctuations in
the rates at which OEMs purchase the Company's products and services, the
OEMs' own business cycles, the timely introduction of new products, any
downturns in any customer's or potential customer's business, the Company's
ability to anticipate and effectively adapt to developing markets and rapidly
changing or new technologies and distribution channels, increased competition,
market acceptance of the Company's products, product life cycles, order delays
or cancellations, changes in the mix of products and services sold by the
Company, shipment and payment schedules, changes in pricing policy by the
Company or its competitors, changes in product distribution, product ratings
by industry analysts and endorsement of competing products by industry groups.
Declines in general economic conditions could also precipitate significant
reductions in capital spending, which could, in turn, affect orders for the
Company's products. The Company's expense levels are based, in significant
part, on expectations of future revenues. Consequently, if revenue levels are
below expectations, expense levels could be disproportionately high as a
percentage of total revenues, and operating results would be immediately and
adversely affected. The Company has failed to meet its expectations of future
revenues in the past. As a result of these and other factors, the Company
believes that its revenues and operating results are difficult to predict and
are subject to fluctuations from period to period, and that period-to-period
comparisons of its results of operations are not meaningful and should not be
relied upon as indications of future performance. See "Management's Discussion
and Analysis of Financial Condition and Results of Operations."
 
DEPENDENCE ON OEMS AND DISTRIBUTION CHANNELS
 
  To date, substantially all of the Company's sales of its products have been
to OEMs. The rate at which the Company's products are used in control networks
is primarily subject to product and marketing decisions made by OEMs. The
Company believes that since OEMs in certain industries receive a large portion
of their revenues from sales of products and services to their installed base,
such OEMs have tended to moderate the rate at which they incorporate LonWorks
technology into their products. The Company has attempted to motivate OEMs, as
well as systems integrators and owners of control systems, to effect a more
rapid transition to LonWorks technology. Furthermore, OEMs that manufacture
and promote products and technologies that compete or may compete with the
Company may be particularly reluctant to employ the Company's products and
technologies to any significant extent, if at all. There can be no assurance
that the Company will be able to improve the current rate of acceptance or
usage of its products by OEMs and others, or that such usage will not decrease
over time. The failure to increase acceptance or usage of the Company's
products, or any decrease in usage of its products, would have a material
adverse effect on the business, operating results and financial condition of
the Company. See "Business--Competition."
 
  Currently, a significant portion of the Company's revenues are derived from
sales by EBV Elektronik GmbH ("EBV"), the sole independent distributor of the
Company's products to OEMs in Europe since December 1997. EBV accounted for
12.0%, 10.9% and 20.6% of the Company's total revenues in fiscal 1995, 1997
and the three months ended March 31, 1998, respectively. The Company's
agreement with EBV expires in November 1998. In addition, as part of its
distribution strategy, the Company intends to develop distribution
arrangements with systems integrators. In particular, the Company expects that
a significant portion of its future revenues will be derived from sales by
such systems integrators. Any failure by EBV or any other existing or future
distributor to dedicate sufficient resources and efforts to the marketing and
selling of the Company's products, or to generate significant revenues for the
Company, could have a material adverse effect on the Company's business,
operating results and financial condition. Also, the failure of the Company to
develop new distribution channels, to maintain the EBV arrangement or any
other distribution channels, or to renew the EBV arrangement on a timely
basis, would result in reduced or delayed revenues, increased operating
expenses and loss of customer goodwill, any of which could have a material
adverse effect on the business, operating results and financial condition of
the Company. See "Business--Sales and Marketing."
 
DEPENDENCE ON KEY MANUFACTURERS
 
  The Neuron Chip is an important component used by the Company's customers in
control network nodes. In addition, the Neuron Chip is an important device
used in many of the Company's products. Neuron Chips are
 
                                       6
<PAGE>
 
manufactured and distributed by both Motorola, Inc. ("Motorola") and Toshiba
Corporation ("Toshiba"). The Company has entered into licensing agreements
with each of Motorola and Toshiba. The agreements, among other things, grant
Motorola and Toshiba the worldwide right to manufacture and distribute Neuron
Chips using technology licensed from the Company and require the Company to
provide support and unspecified updates to the licensed technology over the
terms of the agreements. The Motorola and Toshiba agreements expire in
December 1999 and January 2000 respectively, unless renewed. However, both
Motorola and Toshiba have the right to terminate the agreements at any time.
While the Company developed the first version of the Neuron Chip, Motorola and
Toshiba subsequently developed improved, lower-cost versions of the Neuron
Chip that are presently utilized in products developed and sold by the Company
and its customers. The Company currently has no other source of supply for
Neuron Chips and has neither the resources nor the skills to replace either
Motorola or Toshiba as a designer, manufacturer or distributor of Neuron
Chips. Motorola and Toshiba have played, and are expected to continue to play,
a key role in the development and marketing of LonWorks technology. The loss
of either Motorola or Toshiba as a supplier of the Neuron Chip would have a
material adverse effect on the business, operating results and financial
condition of the Company, and in such event there can be no assurance that the
Company would be able to locate an alternate source for the design,
manufacture or distribution of Neuron Chips. See "Business--Products and
Services," "--Strategic Alliances," "--Manufacturing" and "Certain
Transactions."
 
  The Company's future success will also depend, in significant part, on its
ability to successfully manufacture its products cost-effectively and in
sufficient volumes. For certain key products, the Company utilizes outsourced
manufacturers including GET Manufacturing, Inc. ("GET"), Hi-Tech
Manufacturing, Inc. ("Hi-Tech"), muRata Electronics North America, Inc.
("muRata") and Quadrus Manufacturing Division of Bell Microproducts, Inc.
("Quadrus"). These outsourced manufacturers procure material and assemble,
test and inspect the final products to the Company's specifications. Such a
strategy involves certain risks, including the potential absence of adequate
capacity and reduced control over delivery schedules, product availability,
manufacturing yields, quality and costs. In addition, several key components
are currently purchased only from sole or limited sources. Any interruption in
the supply of these products or components, or the inability of the Company to
procure these products or components from alternate sources at acceptable
prices and within a reasonable time, could have a material adverse effect upon
the Company's business, operating results and financial condition. See
"Business--Manufacturing."
 
COMPETITION
 
  Competition in the Company's markets is intense and involves rapidly
changing technologies, evolving industry standards, frequent new product
introductions and rapid changes in customer requirements. To maintain and
improve its competitive position, the Company must continue to develop and
introduce, on a timely and cost-effective basis, new products, features and
services that keep pace with the evolving needs of its customers. The
principal competitive factors affecting the markets for the Company's control
network products are customer service and support, product reputation,
quality, performance, price and product features such as adaptability,
scalability, ability to integrate with other products, functionality and ease
of use. The Company believes it has in the past generally competed favorably
with offerings of its competitors on the basis of these factors. However,
there can be no assurance that the Company will continue to be able to compete
effectively based on these or any other competitive factors in the future.
 
  In each of its markets, the Company competes with a wide array of
manufacturers, vendors, strategic alliances, systems developers and other
businesses. The Company's competitors include some of the largest companies in
the electronics industry, such as Siemens AG ("Siemens") in the building and
industrial automation industries and Allen-Bradley, a subsidiary of Rockwell
International ("Allen-Bradley"), and Groupe Schneider ("Schneider") in the
industrial automation industry. Many of the Company's competitors, alone or
together with their trade associations and partners, have longer operating
histories, significantly greater financial, technical, marketing, service and
other resources, significantly greater name recognition and broader product
offerings. As a result, such competitors may be able to devote greater
resources to the development, marketing and sale of their products, and may be
able to respond more quickly to changes in customer requirements or
 
                                       7
<PAGE>
 
product technology. In addition, those competitors that manufacture and
promote closed, proprietary control systems may enjoy a captive customer base
dependent on such competitors for service, maintenance, upgrades and
enhancements. Accordingly, there can be no assurance that the Company will be
able to compete successfully with existing or new competitors, or that
competition will not have a material adverse effect on the business, operating
results or financial condition of the Company.
 
  Many of the Company's current and prospective competitors are dedicated to
promoting closed or proprietary systems, technologies, software and network
protocols or product standards that differ from, or are incompatible with,
those of the Company. In some cases, companies have established associations
or cooperative relationships to enhance the competitiveness and popularity of
their products, or to promote such different or incompatible technologies,
protocols and standards. For example, in the building automation market, the
Company faces widespread reluctance by vendors of traditional closed or
proprietary control systems (who enjoy a captive market for servicing and
replacing equipment) to utilize the Company's interoperable technologies, as
well as strong competition by large trade associations that promote
alternative technologies and standards in their native countries, such as the
BatiBus Club International in France and the European Installation Bus
Association in Germany (each of which has over 100 members and licensees).
Other examples include the CEBus Industry Council, which is the proponent of
an alternative protocol to the Company's LonTalk protocol for use in the home
automation industry, and a group comprised of Asea Brown Boveri, ADtranz AB,
Siemens, GEC Alstrom and other manufacturers that support an alternative rail
transportation protocol to the Company's LonTalk protocol. There can be no
assurance that the Company's technologies, protocols or standards will be
successful in any of its markets, or that the Company will be able to compete
with new or enhanced products or standards introduced by existing or future
competitors. Any increase in competition or failure by the Company to
effectively compete with new or enhanced products or standards could result in
fewer customer orders, price reductions, reduced order size, reduced operating
margins and loss of market share, any of which could have a material adverse
effect on the business, operating results or financial condition of the
Company. See "Business--Competition."
 
  LonWorks technology is open, meaning that many of the Company's key
technology patents are broadly licensed without royalties or license fees. As
a result, the Company's customers are capable of developing products that
compete with some of the Company's products. Because some of the Company's
customers are OEMs that develop and market their own control systems, these
customers in particular could develop competing products based on the
Company's open technology. This could decrease the market for the Company's
products, increase competition, and have a material adverse effect on the
Company's business, operating results and financial condition. See "Business--
Products and Services."
 
DEPENDENCE ON KEY PERSONNEL
 
  The Company's performance is substantially dependent on the performance of
its executive officers and key employees. The loss of the services of any of
the Company's executive officers or key employees could have a material
adverse effect on the business, operating results and financial condition of
the Company. The Company is particularly dependent upon its Chief Executive
Officer, as well as its technical personnel, due to the specialized technical
nature of the Company's business. The Company's future success will depend on
its ability to attract, integrate, motivate and retain qualified technical,
sales, operations and managerial personnel. There is intense competition for
qualified personnel in the areas of the Company's activities, and there can be
no assurance that the Company will be able to continue to attract and retain
qualified executive officers and key personnel necessary for the development
and success of its business. Currently, only Frederik Bruggink, the Company's
Vice President, Europe, Middle East and Africa, is bound by an employment
agreement. If the Company is unable to hire personnel on a timely basis in the
future, the Company's business, operating results and financial condition will
be materially and adversely affected. In addition, the departure or
replacement of key personnel could be disruptive, lead to additional
departures and therefore have a material adverse effect on the Company's
business, operating results and financial condition. The Company maintains and
is the beneficiary of life insurance policies in the amount of $2.5 million
covering each of M. Kenneth Oshman, its Chief Executive
 
                                       8
<PAGE>
 
Officer, Beatrice Yormark, its Vice President of Sales and Marketing, and
Oliver R. Stanfield, its Chief Financial Officer. There can be no assurance
that such proceeds would be sufficient to compensate the Company in the event
of the death of Mr. Oshman, Ms. Yormark or Mr. Stanfield. See "Management."
 
NEW PRODUCTS AND RAPID TECHNOLOGICAL CHANGE
 
  Customer requirements for control network products can change as a result of
innovations or changes within the building, industrial, transportation, home
and other industries. For example, the adoption of new or different standards
within industry segments may give rise to new customer requirements, which may
or may not be compatible with the Company's current or future product
offerings. The Company's future success depends in large part on its ability
to continue to enhance existing products, lower product cost and develop new
products that maintain technological competitiveness. There can be no
assurance that the Company will be successful in modifying its products and
services to address these requirements and standards. For example, certain of
the Company's competitors may develop competing technologies based on Internet
protocols that may have advantages over the Company's products in remote
connection. If the Company is unable, for technological or other reasons, to
develop new products or enhancements of existing products in a timely manner
to respond to changing market conditions, competitive factors and customer
requirements, the Company's business, operating results and financial
condition would be materially adversely affected. See "Business--Competition."
 
  From time to time, the introduction of new products by the Company has been
delayed beyond the Company's projected shipping date for such products. In
each instance, such delays have resulted in increased costs and delayed
revenues. Because future revenues are dependent on the timely introduction of
new product offerings, any such future delays could have a material adverse
effect on the Company's business, operating results and financial condition.
 
MARKET ACCEPTANCE OF INTEROPERABILITY
 
  The future operating success of the Company will depend, in significant
part, on the successful development of interoperable products by the Company
and OEMs, and the acceptance of interoperable products by systems integrators
and end-users. When products or subsystems from multiple vendors can be
integrated into a control system without the need to develop custom hardware
or software, they are "interoperable." The Company has expended considerable
resources to develop, market and sell interoperable products, and has made
such products a cornerstone of its sales and marketing strategy. The Company
has widely promoted interoperable products as offering benefits such as lower
life-cycle costs and improved flexibility to owners and users of control
networks. However, there can be no assurance that OEMs who manufacture and
market closed systems will accept, promote or employ interoperable products,
since doing so may expose such OEMs' businesses to increased competition. In
addition, there can be no assurance that OEMs will, in fact, successfully
develop interoperable products, or that OEMs' interoperable products will be
accepted by their customers. The failure of OEMs to develop interoperable
products, or the failure of interoperable products to achieve market
acceptance, would have a material adverse effect on the business, operating
results and financial condition of the Company. See "--Competition" and
"Business--Industry Background."
 
INTERNATIONAL OPERATIONS; CURRENCY FLUCTUATIONS
 
  The Company's sales and marketing operations are located in 10 countries.
Revenues from international sales, which include both export sales and sales
by international subsidiaries, accounted for approximately 52.0%, 53.6%, 57.5%
and 57.0% of the Company's total revenues during 1995, 1996, 1997 and the
three months ended March 31, 1998, respectively. The Company's operations and
the market price of its products may be directly affected by economic and
political conditions in the countries where the Company does business. In
addition, there can be no assurance that the Company will be able to maintain
or increase the international demand for its products. Additional risks
inherent in the Company's international business activities generally include
currency fluctuations, unexpected changes in regulatory requirements, tariffs
and other trade barriers, costs of localizing products for foreign countries,
lack of acceptance of non-local products in foreign countries,
 
                                       9
<PAGE>
 
longer accounts receivable payment cycles, difficulties in managing
international operations, potentially adverse tax consequences, including
restrictions on repatriation of earnings, and the burdens of complying with a
wide variety of foreign laws. Differing vacation and holiday patterns in other
countries, particularly in Europe, may also affect the amount of business
transacted by the Company in other countries in any given quarter, the timing
of the Company's revenues and its ability to forecast its projected operating
results for such quarter. In 1997, approximately 10.7% of the Company's
revenues were conducted in currencies other than the U.S. dollar, principally
the Japanese Yen. Fluctuations in the value of currencies in which the Company
conducts its business relative to the U.S. dollar could cause currency
translation adjustments. The Company has recently experienced and in the
future may experience an increase in currency translation adjustments relative
to currencies of Asia Pacific countries, as well as order delays,
cancellations and pricing pressure in those countries as a result of general
economic conditions in that region. The forthcoming introduction of the "Euro"
as the standard currency in participating European countries may also impact
the ability of the Company to denominate sales transactions in U.S. dollars.
To the extent that fewer of the Company's sales in Europe are denominated in
U.S. dollars, the Company may experience an increase in currency translation
adjustments, particularly as a result of general economic conditions in Europe
as a whole. The Company does not currently engage in currency hedging
transactions or otherwise cover its foreign currency exposure. There can be no
assurance that such factors will not have a material adverse effect on
international revenues and, consequently, the Company's business, operating
results and financial condition. See "Business--Sales and Marketing."
 
LENGTHY SALES CYCLE
 
  The sales cycle between initial customer contact and execution of a contract
or license agreement with a customer can vary widely. OEMs typically conduct
extensive and lengthy product evaluations before making initial purchases of
the Company's products. Subsequent purchases of the Company's products may be
delayed by prolonged product development and introduction periods for OEMs.
Attendant delays in the Company's sales cycle can result from, among other
things, changes in customers' budgets or in the priority assigned to control
network development and to educating customers as to the potential
applications of and cost savings associated with the Company's products. The
Company generally has little or no control over these factors, which may cause
a potential customer to favor a competitor's products, or to delay or forgo
purchases altogether. As a result of the foregoing, the Company's ability to
forecast the timing and amount of specific sales is limited, and the delay or
failure to complete transactions could have a material adverse effect on the
Company's business, operating results and financial condition and cause the
Company's operating results to vary significantly from period to period.
 
LIMITED PROTECTION OF INTELLECTUAL PROPERTY RIGHTS
 
  The Company's success depends significantly upon its intellectual property
rights. The Company relies on a combination of patent, copyright, trademark
and trade secret laws, non-disclosure agreements and other contractual
provisions to establish, maintain and protect its intellectual property
rights, all of which afford only limited protection. The Company has 65 issued
U.S. patents, 21 pending U.S. patent applications, and various foreign
counterparts. There can be no assurance that patents will issue from these
pending applications or from any future applications or that, if issued, any
claims allowed will be sufficiently broad to protect the Company's technology.
Failure of any patents to protect the Company's technology, may make it easier
for the Company's competitors to offer equivalent or superior technology. The
Company has registered or applied for registration for certain trademarks, and
will continue to evaluate the registration of additional trademarks as
appropriate. Any failure by the Company to properly register or maintain its
trademarks or to otherwise take all necessary steps to protect its trademarks
may diminish the value associated with the Company's trademarks. In addition,
any failure by the Company to take all necessary steps to protect its trade
secrets or other intellectual property rights may have a material adverse
effect on the Company's ability to compete in its markets. Despite the
Company's efforts to protect its proprietary rights, unauthorized parties may
attempt to copy aspects of the Company's products or services or to obtain and
use information that the Company regards as proprietary. There can be no
assurance that any patents, trademarks, copyrights or intellectual property
rights that have been or may be issued or granted
 
                                      10
<PAGE>
 
will not be challenged, invalidated or circumvented, or that any rights
granted thereunder would provide protection for the Company's proprietary
rights. In addition, there can be no assurance that the Company has taken or
will take all necessary steps to protect its intellectual property rights.
Third parties may also independently develop similar technology without breach
of the Company's trade secrets or other proprietary rights. The Company has
licensed in the past and may license in the future its key technologies to
third parties. In addition, the laws of some foreign countries, including
several in which the Company operates or sells its products, do not protect
proprietary rights to as great an extent as do the laws of the United States.
Certain of the Company's products are licensed under shrink wrap license
agreements that are not signed by licensees and therefore may not be binding
under the laws of certain jurisdictions.
 
  From time to time, litigation may be necessary to defend and enforce the
Company's proprietary rights. Such litigation could result in substantial
costs and diversion of management resources and could have a material adverse
effect on the Company's business, operating results and financial condition,
regardless of the final outcome. Despite the Company's efforts to safeguard
and maintain its proprietary rights both in the United States and abroad,
there can be no assurance that the Company will be successful in doing so or
that the steps taken by the Company in this regard will be adequate to deter
infringement, misuse, misappropriation or independent third-party development
of the Company's technology or intellectual property rights or to prevent an
unauthorized third party from copying or otherwise obtaining and using the
Company's products or technology. Any of such events could have a material
adverse effect on the Company's business, operating results and financial
condition. See "Business--Proprietary Rights."
 
RISKS OF PRODUCT DEFECTS OR MISUSE
 
  Products developed, licensed and sold by the Company may contain errors or
failures or may be improperly installed or implemented. There can be no
assurance that errors or failures will not be found in the Company's products
or that, if discovered, the Company will be able to successfully correct such
errors or failures in a timely manner or at all. In addition, there can be no
assurance that the Company's products will be properly installed or
implemented by third parties. The occurrence of errors or failures in the
Company's products and applications, or improper installation or
implementation of the Company's products, could result in loss of or delay in
market acceptance, increased service and warranty costs or payment of
compensatory or other damages. In addition, such errors or failures may result
in delays of revenue recognition by the Company and diversion of the Company's
engineering resources to correct such defects. The Company maintains errors
and omissions insurance to cover liability associated with its operations but
there can be no assurance that any such insurance will be available or will be
sufficient in amount to cover any particular claim. Although the Company's
agreements with its customers typically contain provisions intended to limit
the Company's exposure to potential claims as well as any liabilities arising
from such claims, and may in very limited instances require that the Company
be named as an additional insured under the insurance policies carried by some
of its customers, such contracts and insurance may not effectively protect the
Company against the liabilities and expenses associated with product errors or
failures. Accordingly, errors or failures in the Company's products or
applications or improper installation or implementation of the Company's
products by third parties could have a material adverse effect on the
Company's business, operating results and financial condition. In addition,
because of the low cost and interoperable nature of the Company's products,
LonWorks technology could be used in a manner for which it was not intended,
which could lead to loss of goodwill or material financial losses for the
Company, or otherwise have a material adverse effect on the Company's
business, operating results and financial condition.
 
REGULATORY ACTIONS
 
  Many of the Company's products and the industries in which they are used are
subject to U.S. and foreign regulation. Government regulatory action could
greatly reduce the market for the Company's products. For example, the power
line medium (the communications medium used by some of the Company's products)
is subject to special regulations in North America, Europe and Japan. These
regulations limit the ability of companies in general to use power lines as a
communication medium. In addition, some of the Company's competitors have
attempted to use regulatory actions to reduce the market opportunity for the
Company's
 
                                      11
<PAGE>
 
products or to increase the market opportunity for the competitors' products.
For example, the Consumer Electronics Manufacturers Association ("CEMA"), a
trade association that developed the CEBus protocol, an alternative to the
Company's LonTalk protocol for use in home automation applications, has
proposed that the Federal Communications Commission ("FCC") adopt a standard
for television-cable compatibility that encompasses CEBus. CEMA has also
proposed the use of such standard with respect to an FCC rulemaking relating
to the commercial availability of navigation devices, such as set-top boxes.
The Company has resisted these efforts and will continue to oppose
competitors' efforts to use regulation to impede competition in the markets
for the Company's products. There can be no assurance that existing or future
regulations or regulatory actions would not adversely affect the market for
the Company's products or require significant expenditures of management,
technical or financial resources, any of which could have a material adverse
effect on the Company's business, operating results and a financial condition.
See "Business--Government Regulation."
 
VOLUNTARY STANDARDS
 
  Standards bodies, which are formal and informal associations that attempt to
set voluntary, non-governmental product standards, are influential in many of
the Company's target markets. Some of the Company's competitors have attempted
to use voluntary standards to reduce the market opportunity for the Company's
products, or to increase the market opportunity for the competitors' products,
by lobbying for the adoption of voluntary standards that would exclude or
limit the use of the Company's products. The Company participates in many
voluntary standards processes both to avoid adoption of exclusionary standards
and to promote voluntary standards for the Company's products. However, the
Company does not have the resources to participate in all voluntary standards
processes that may affect its markets. The adoption of voluntary standards
that are incompatible with the Company's products or technology could have a
material adverse effect on the Company's business, operating results and
financial condition. See "Business--Competition."
 
YEAR 2000 COMPLIANCE
 
  Computer programs that are written using two digits rather than four to
define the applicable year, may have date-sensitive software and, for
instance, may recognize a date using 00 as the year 1900 rather than the year
2000 ("Date Code Dependency"). This could result in a system failure or
miscalculations causing disruptions of operations, including, among other
things, a temporary inability to process transactions, send invoices, or
engage in normal business activities. The Company's enterprise resource
planning ("ERP") system does have Date Code Dependencies. The Company is in
the process of replacing its current ERP system, and believes that this
replacement will be completed by June 1999, before any Date Code Dependencies
within the Company's current ERP system have a material adverse impact upon
the Company's operations. The Company has not yet estimated the cost of such
replacement. The Company is currently evaluating the dependency of its
products on date codes and intends to announce a program for addressing the
impact of the year 2000 on any such products in the near future. Failure of
the Company's ERP system or its products to operate properly with regard to
the Year 2000 and thereafter could require the Company to incur unanticipated
expenses to remedy any problems, which could have a material adverse effect on
the Company's business, operating results and financial condition. Date Code
Dependency issues may also arise with respect to any modifications made to the
Company's products by a party other than the Company or from the combination
or use of the Company's products with any other software programs or hardware
devices not provided by the Company, and therefore may result in unforeseen
Year 2000 compliance problems for some of the Company's customers, which could
result in reduced customer orders or liability to the Company, and which could
have a material adverse effect on the Company's business, operating results
and financial condition. The Company faces risks to the extent that suppliers
of products, services and systems purchased by the Company have business
systems or products that have a Date Code Dependency. In the event any such
third parties cannot provide the Company with products, services or systems
that meet year 2000 requirements in a timely manner, the Company's business
operating results and financial condition could be materially adversely
affected. In addition, some of the Company's customers or vendors could
experience Date Code Dependency problems that could result in disruptions of
their internal operations, could delay their purchases of the Company's
products, and, in turn, could result in a material adverse effect on the
Company's business, operating results and financial condition.
 
                                      12
<PAGE>
 
CONTROL BY EXISTING STOCKHOLDERS
 
  Immediately after the closing of this offering, the directors and executive
officers of the Company, together with certain entities affiliated with them,
assuming no exercise of outstanding stock options, will beneficially own 46.9%
of the Company's outstanding Common Stock and Motorola, a principal
stockholder of the Company, will own 12.2% of the Company's outstanding Common
Stock. Further, pursuant to the terms of the stock purchase agreement under
which Motorola initially acquired its shares, Motorola and two other
stockholders which together own approximately 6.1% of the Company's
outstanding Common Stock have agreed to vote (i) all of their shares in favor
of the slate of director nominees recommended by the Board of Directors, and
(ii) a number of shares equal to at least that percentage of shares voted by
all other stockholders for or against any given matter, as recommended by the
Board of Directors, (except certain matters relating to certain changes to the
Company's charter, liquidations, a sale of the Company or a merger of the
Company into another entity), as recommended by a majority of the Board of
Directors. As a result, these stockholders would be able to control
substantially all matters requiring approval by the stockholders of their
Company, including the election of all directors and approval of significant
corporate transactions. See "Management--Executive Officers and Directors,"
"Certain Transactions" and "Principal Stockholders."
 
SHARES ELIGIBLE FOR FUTURE SALE
 
  Upon completion of this offering, based on the outstanding shares of Common
Stock at March 31, 1998, the Company will have outstanding 32,125,612 shares
of Common Stock outstanding (32,875,612 if the Underwriters' over-allotment
option is exercised in full). On the date of this Prospectus, in addition to
the 5,000,000 shares offered hereby, 483,674 shares of Common Stock held by
current stockholders will be immediately eligible for sale in the public
market without restriction. The Company, its officers, directors and certain
security holders of the Company have agreed not to offer, sell, contract to
sell, grant any option or other right for the sale of, or otherwise dispose of
any shares of Common Stock or any securities, indebtedness or other rights
exercisable for or convertible or exchangeable into Common Stock owned or
acquired in the future in any manner prior to the expiration of 180 days after
the date of this Prospectus without the prior written consent of NationsBanc
Montgomery Securities LLC on behalf of the Underwriters. Subject to volume
limitations on sales by affiliates pursuant to Rule 144 under the Securities
Act of 1933, as amended (the "Securities Act"), and taking into account the
effect of lock-up provisions applicable to the officers, directors and certain
stockholders of the Company, 26,641,938 additional shares of Common Stock will
be eligible for sale beginning 180 days after the date of this Prospectus.
This includes 247,375 shares held by existing stockholders pursuant to an
effective Regulation A offering statement covering the Company's 1997 Stock
Plan. No prediction can be made of the effect, if any, that sales of shares
under Rule 144 or the availability of shares for sale will have on the market
price of the Common Stock prevailing from time to time after this offering.
The Company is unable to estimate the number of shares that may be sold in the
public market under Rule 144, because such amount will depend on the trading
volume in, and market price for, the Common Stock and other factors.
Nevertheless, sales of substantial amounts of shares in the public market, or
the perception that such sales could occur, could adversely affect the market
price of the Common Stock. Following this offering, the Company intends to
file a registration statement under the Securities Act to register
approximately 8,025,395 shares (including 4,082,695 shares subject to
outstanding options at March 31, 1998) reserved for issuance under the
Company's stock plans. Shares of Common Stock issued under the Company's stock
plans after the effective date of such registration will be freely tradeable
in the public market, subject to the 180 day lock-up referred to above and
subject in the case of sales by affiliates to the volume limitation, manner of
sale, notice and public information requirements of Rule 144. In addition,
after the consummation of this offering, the holders of approximately
18,665,548 shares of Common Stock are entitled to certain rights with respect
to the registration of such shares under the Securities Act. Such registration
rights terminate for each holder when all of such holder's shares may be sold
within a given three month period under Rule 144 or other applicable
exemption; other than 10,927,498 shares held by affiliates of the Company who
will be subject to the volume limitations of Rule 144 following this offering,
all of such shares will be eligible for sale 180 days following this offering.
See "Description of Capital Stock--Registration Rights," "Shares Eligible for
Future Sale" and "Underwriting."
 
                                      13
<PAGE>
 
ANTI-TAKEOVER PROVISIONS
 
  Immediately after the closing of this offering, the Board of Directors will
have the authority to issue up to 5,000,000 shares of Preferred Stock and to
determine the price, rights, preferences, privileges and restrictions,
including voting rights, of those shares without any further vote or action by
the stockholders. The rights of the holders of Common Stock will be subject
to, and may be adversely affected by, the rights of holders of any Preferred
Stock that may be issued in the future. The issuance of Preferred Stock may
delay, defer or prevent a change in control of the Company as the terms of the
Preferred Stock that might be issued could potentially prohibit the Company's
consummation of any merger, reorganization, sale of substantially all of its
assets, liquidation or other extraordinary corporate transaction without the
approval of the holders of the outstanding shares of the Preferred Stock.
Additionally, the issuance of Preferred Stock could have a dilutive effect on
shareholders of the Company. The Company has no present plans to issue shares
of Preferred Stock. In addition, Section 203 of the Delaware General
Corporation Law, to which the Company is subject, restricts certain business
combinations with any "interested stockholder" as defined by such statute. The
statute may delay, defer or prevent a change in control of the Company. In
addition, certain provisions of the Company's Amended and Restated Certificate
of Incorporation may have the effect of delaying or preventing a change of
control of the Company, which could adversely affect the market price of the
Company's Common Stock. These provisions provide, among other things, that the
Board of Directors is divided into three classes with staggered three-year
terms, that stockholders may not take action by written consent, that the
ability of stockholders to call special meetings of stockholders and to raise
matters at meetings of stockholders is restricted and that certain amendments
of the Company's Amended and Restated Certificate of Incorporation, and
certain amendments by the stockholders of the Company's Bylaws, require the
approval of holders of at least 66 2/3% of the voting power of all outstanding
shares. In addition, the Company is subject to the anti-takeover provisions of
Section 203 of the Delaware General Corporation Law, which will prohibit the
Company from engaging in a "business combination" with an "interested
stockholder" for a period of three years after the date of the transaction in
which the person became an interested stockholder, unless the business
combination is approved in a prescribed manner. The application of Section 203
also could have the effect of delaying or preventing a change of control of
the Company. See "Description of Capital Stock--Preferred Stock" and "--
Delaware Law and Certain Charter and Bylaw Provisions" and "Description of
Capital Stock."
 
NO PRIOR PUBLIC MARKET; POSSIBLE VOLATILITY OF STOCK PRICE
 
  Prior to this offering, there has been no public market for the Company's
Common Stock, and there can be no assurance that an active public market for
the Common Stock will develop or be sustained after this offering. The initial
public offering price will be determined by negotiation between the Company
and the Underwriters based on several factors, and may bear no relationship to
the price at which the Common Stock will trade upon completion of this
offering. See "Underwriting" for a discussion of the factors to be considered
in determining the initial public offering price. The market price of the
Company's Common Stock is likely to be highly volatile and could be subject to
wide fluctuations in response to quarterly variations in operating results,
announcements of technological innovations or new products by the Company or
its competitors, changes in financial estimates by securities analysts, or
other events or factors. In addition, there has been significant volatility in
the market price of securities of technology companies (especially those in
new or emerging industries, such as the Company), which volatility is often
unrelated to the operating performance of particular companies. In the future,
the Company's operating results could fall below analysts' expectations, which
would adversely affect the market price of the Company's Common Stock. In the
past, following a period of volatility in the market price of a company's
securities, securities class action lawsuits have often been instituted
against companies. If brought against the Company, regardless of outcome, the
costs and diversion of management resources of defending such litigation could
have a material adverse effect on its business, operating results and
financial condition.
 
IMMEDIATE AND SUBSTANTIAL DILUTION
 
  The initial public offering price will be substantially higher than the book
value per share of the currently outstanding Common Stock. Investors
purchasing shares in this offering will therefore suffer immediate and
 
                                      14
<PAGE>
 
substantial dilution of $5.78 per share in the pro forma net tangible book
value of their Common Stock from the initial public offering price of $7.00
per share. In addition, the exercise of any of the currently outstanding
warrants or stock options would likely result in a dilution of the value of
the Common Stock. Moreover, the Company may at any time in the future sell
additional securities and/or rights to purchase such securities, grant
additional warrants, stock options or other forms of equity-based incentive
compensation to the Company's management and/or employees to attract and
retain such personnel or in connection with the obtaining of financing, such
as debt or leasing arrangements accompanied by warrants to purchase equity
securities of the Company. Any of these actions would have a dilutive effect
upon the holders of the Common Stock. See "Dilution."
 
BROAD MANAGEMENT DISCRETION AS TO USE OF PROCEEDS
 
  The net proceeds to be received by the Company in connection with this
offering will be used for working capital and general corporate purposes.
Accordingly, management will have broad discretion with respect to the
expenditure of such proceeds. Purchasers of shares of Common Stock offered
hereby will be entrusting their funds to the Company's management, upon whose
judgment they must depend, with limited information concerning the specific
working capital requirements and general corporate purposes to which the funds
will ultimately be applied. See "Use of Proceeds."
 
ABSENCE OF DIVIDENDS
 
  The Company has not paid cash dividends and does not anticipate paying cash
dividends on the Common Stock in the foreseeable future. The Company intends
to retain future earnings, if any, for use in its business. In addition, the
Company's revolving line of credit agreement prohibits the payment of
dividends other than stock dividends. See "Dividend Policy."
 
                                      15
<PAGE>
 
                                USE OF PROCEEDS
 
  The net proceeds to the Company from the sale of the 5,000,000 shares of
Common Stock being offered hereby, based on the initial public offering price
of $7.00 per share and after deducting the underwriting discount and estimated
offering expenses payable by the Company, are estimated to be approximately
$31.9 million (approximately $36.7 million if the Underwriters' over-allotment
option is exercised in full).
 
  The principal purposes of this offering are to increase the Company's equity
capital, to create a public market for the Company's Common Stock, to
facilitate future access by the Company to public equity markets and to
provide increased visibility of the Company in a marketplace where many
competitors are publicly-held companies. The Company currently has no specific
plans for the net proceeds of this offering, but the Company expects to use
such proceeds for general corporate purposes, including working capital and
capital expenditures. The Company may also use a portion of such proceeds for
possible acquisitions of businesses, products and technologies that are
complementary to those of the Company. The Company has not identified any
specific businesses, products or technologies that it may acquire and does not
have any current agreements or negotiations with respect to any such
transactions. Pending use of the net proceeds of this offering for the above
purposes, the Company intends to invest such funds in short-term, interest-
bearing, investment-grade securities. See "Risk Factors--Broad Management
Discretion as to Use of Proceeds."
 
                                DIVIDEND POLICY
 
  The Company has not paid any dividends on its capital stock and does not
expect to pay any dividends in the foreseeable future. The Company currently
intends to retain future earnings, if any, to finance the growth and
development of its business and therefore does not anticipate paying any cash
dividends in the foreseeable future. The payment of cash dividends in the
future will be at the discretion of the Board of Directors and subject to
certain limitations under the Delaware General Corporation Law, and will
depend on such factors as the Company's earnings levels, capital requirements,
financial condition and other factors deemed relevant by the Board of
Directors. In addition, the Company's revolving line of credit agreement
prohibits the payment of dividends other than stock dividends. There can be no
assurance that the Company will pay any dividends in the future. See "Risk
Factors--Absence of Dividends."
 
                                      16
<PAGE>
 
                                CAPITALIZATION
 
  The following table sets forth the capitalization of the Company as of March
31, 1998 (i) on an actual basis and (ii) as adjusted to reflect the receipt by
the Company of the net proceeds from the sale and issuance of 5,000,000 shares
of Common Stock by the Company at the initial public offering price of $7.00
per share after deducting the underwriting discount and estimated offering
expenses payable by the Company and the automatic conversion of all
outstanding shares of Preferred Stock into Common Stock upon the closing of
this offering. See "Certain Transactions" and "Description of Capital Stock."
This information should be read in conjunction with the Company's Financial
Statements and the Notes thereto included elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                             MARCH 31, 1998
                                                          ---------------------
                                                           ACTUAL   AS ADJUSTED
                                                          --------  -----------
                                                             (IN THOUSANDS)
<S>                                                       <C>       <C>
Stockholders' equity(1):
  Preferred Stock, $.01 par value, 11,000,000 shares
   authorized, 7,887,381 shares issued and outstanding,
   actual; 5,000,000 shares authorized, no shares issued
   or outstanding, as adjusted........................... $     79   $    --
  Common Stock, $.01 par value, 50,000,000 shares
   authorized, 19,238,231 shares issued and outstanding,
   actual; 100,000,000 shares authorized,
   32,125,612 shares issued and outstanding, as
   adjusted..............................................      192        321
  Additional paid-in capital.............................   94,530    126,330
  Deferred compensation..................................     (519)      (519)
  Cumulative translation adjustment......................     (415)      (415)
  Accumulated deficit....................................  (86,385)   (86,385)
                                                          --------   --------
    Total stockholders' equity........................... $  7,482   $ 39,332
                                                          ========   ========
</TABLE>
- --------
(1) Includes 1,802,438 shares of Common Stock issued under stock purchase
    agreements subject to repurchase by the Company at a weighted average
    price of $1.26 per share. Excludes (i) 4,082,695 shares of Common Stock
    issuable upon exercise of options outstanding as of March 31, 1998 at a
    weighted average exercise price of $1.33 per share, of which options to
    purchase 3,932,695 shares (including 3,167,780 shares subject to
    repurchase by the Company at a weighted average exercise price of $1.31
    per share) were exercisable, (ii) 3,942,700 shares of Common Stock
    reserved for future issuance under the Company's stock option plans and
    (iii) 430,000 shares of Common Stock issuable upon exercise of warrants
    outstanding as of March 31, 1998 at a weighted average exercise price of
    $5.49 per share. See "Management--Stock Option Plans and Warrants,"
    "Description of Capital Stock" and Note 6 of Notes to Consolidated
    Financial Statements.
 
                                      17
<PAGE>
 
                                   DILUTION
 
  The pro forma net tangible book value of the Company as of March 31, 1998
assuming the conversion of all outstanding shares of Preferred Stock into
Common Stock on a one-for-one basis upon the closing of this offering, was
approximately $7.5 million, or $0.28 per share of Common Stock. Net tangible
book value per share is determined by dividing the net tangible book value of
the Company (total tangible assets less total liabilities) by the number of
shares of Common Stock deemed outstanding at that date. After giving effect to
the sale by the Company of the 5,000,000 shares of Common Stock offered hereby
at the initial public offering price of $7.00 per share and after deducting
the underwriting discount and estimated offering expenses payable by the
Company, the Company's pro forma net tangible book value at March 31, 1998
would have been $39.3 million, or $1.22 per share. This represents an
immediate increase in net tangible book value to existing shareholders of
$0.94 per share and an immediate dilution of $5.78 per share to new investors
purchasing shares at the initial public offering price. The following table
illustrates the per share dilution:
 
<TABLE>
<S>                                                                 <C>   <C>
Initial public offering price per share............................       $7.00
  Pro forma net tangible book value per share as of March 31,
   1998............................................................ $0.28
  Increase per share attributable to new investors.................  0.94
                                                                    -----
Pro forma net tangible book value per share after this offering....        1.22
                                                                          -----
Dilution per share to new investors................................       $5.78
                                                                          =====
</TABLE>
 
  The following table sets forth on a pro forma basis as of March 31, 1998 the
number of shares of Common Stock purchased from the Company, the total
consideration paid, and the average price per share paid by existing
shareholders and by the new investors at the initial public offering price of
$7.00 per share (before deducting the underwriting discount and estimated
offering expenses payable by the Company).
 
<TABLE>
<CAPTION>
                                SHARES PURCHASED  TOTAL CONSIDERATION   AVERAGE
                               ------------------ -------------------- PRICE PER
                                 NUMBER   PERCENT    AMOUNT    PERCENT   SHARE
                               ---------- ------- ------------ ------- ---------
<S>                            <C>        <C>     <C>          <C>     <C>
Existing stockholders......... 27,125,612   84.4% $ 94,406,000   73.0%   $3.48
New investors.................  5,000,000   15.6    35,000,000   27.0     7.00
                               ----------  -----  ------------  -----
  Total....................... 32,125,612  100.0% $129,406,000  100.0%
                               ==========  =====  ============  =====
</TABLE>
- --------
 
  The foregoing tables assume no exercise of the Underwriters' over-allotment
option and no exercise of stock options or warrants outstanding at March 31,
1998. As of March 31, 1998, there were options outstanding to purchase a total
of 4,082,695 shares of Common Stock at a weighted average exercise price of
$1.33 per share, of which options to purchase 3,932,695 shares (including
3,167,780 shares subject to repurchase by the Company at a weighted average
exercise price of $1.31 per share) were exercisable and 3,942,700 shares were
reserved for future issuance under the Company's stock option plans. In
addition, as of March 31, 1998, there were warrants outstanding to purchase
430,000 shares of Common Stock at a weighted average exercise price of $5.49
per share and 1,802,438 shares of Common Stock issued under stock purchase
agreements which were subject to repurchase by the Company at a weighted
average price of $1.26 per share. To the extent that the over-allotment option
or any of these options or warrants are exercised, there will be further
dilution to new investors. See "Capitalization," "Management--Stock Option
Plans and Warrants," "Description of Capital Stock" and Note 6 of Notes to
Consolidated Financial Statements.
 
                                      18
<PAGE>
 
                     SELECTED CONSOLIDATED FINANCIAL DATA
 
  The following selected consolidated financial data should be read in
conjunction with the Company's Consolidated Financial Statements and Notes
thereto and "Management's Discussion and Analysis of Financial Condition and
Results of Operations" included elsewhere herein. The consolidated statement
of operations data for the years ended December 31, 1995, 1996 and 1997, and
the consolidated balance sheet data at December 31, 1996 and 1997 are derived
from, and are qualified by reference to, the Consolidated Financial Statements
audited by Arthur Andersen LLP, independent public accountants, included
elsewhere in this Prospectus. The consolidated statement of operations data
for the years ended December 31, 1993 and 1994 and the consolidated balance
sheet data at December 31, 1993, 1994 and 1995 are derived from the Company's
consolidated financial statements audited by Arthur Andersen LLP that do not
appear herein. The consolidated statement of operations data for the three
months ended March 31, 1997 and 1998 and the consolidated balance sheet data
at March 31, 1998 are derived from the unaudited consolidated financial
statements appearing elsewhere herein and which, in the opinion of management,
include all adjustments, consisting only of normal recurring adjustments,
necessary for a fair statement of the results of the unaudited interim
periods. The financial results for the three months ended March 31, 1998 are
not necessarily indicative of the results to be expected for any other interim
period or the fiscal year. The historical results are not necessarily
indicative of the results of operations to be expected in the future.
<TABLE>
<CAPTION>
                                                                              THREE MONTHS
                                     YEAR ENDED DECEMBER 31,                 ENDED MARCH 31,
                           ------------------------------------------------  ----------------
                             1993      1994      1995      1996      1997     1997     1998
                           --------  --------  --------  --------  --------  -------  -------
CONSOLIDATED STATEMENT OF
 OPERATIONS DATA:             (IN THOUSANDS, EXCEPT PER SHARE DATA)            (UNAUDITED)
<S>                        <C>       <C>       <C>       <C>       <C>       <C>      <C>
Revenues:
 Product................   $ 10,104  $ 14,368  $ 20,183  $ 20,708  $ 24,665  $ 6,548  $ 7,188
 Service................      1,441     2,364     3,160     3,282     3,637      926      771
                           --------  --------  --------  --------  --------  -------  -------
 Total revenues.........     11,545    16,732    23,343    23,990    28,302    7,474    7,959
Cost of revenues:
 Cost of product........      3,764     6,733     9,434    10,761    11,761    3,111    3,249
 Cost of service........        990     1,006     1,141     1,142     1,810      455      543
                           --------  --------  --------  --------  --------  -------  -------
 Total cost of reve-
  nues..................      4,754     7,739    10,575    11,903    13,571    3,566    3,792
                           --------  --------  --------  --------  --------  -------  -------
 Gross profit...........      6,791     8,993    12,768    12,087    14,731    3,908    4,167
                           --------  --------  --------  --------  --------  -------  -------
Operating expenses:
 Product development....      6,861     6,658     7,355     7,526     7,121    1,740    1,958
 Sales and marketing....      8,628     9,317    10,881    11,577    12,128    3,014    3,031
 General and administra-
  tive..................      2,575     3,268     4,386     3,921     4,004    1,098      935
                           --------  --------  --------  --------  --------  -------  -------
 Total operating ex-
  penses................     18,064    19.243    22,622    23,024    23,253    5,852    5,924
                           --------  --------  --------  --------  --------  -------  -------
 Loss from operations...    (11,273)  (10,250)   (9,854)  (10,937)   (8,522)  (1,944)  (1,757)
Other income (expense):
 Interest income, net...        180       809     1,109       536       429       71       67
 Other income (expense),
  net...................          9        44       175      (163)       68       21        8
                           --------  --------  --------  --------  --------  -------  -------
 Total other income (ex-
  pense)................        189       853     1,284       373       497       92       75
                           --------  --------  --------  --------  --------  -------  -------
 Loss before provision
  for income taxes......    (11,084)   (9,397)   (8,570)  (10,564)   (8,025)  (1,852)  (1,682)
Provision for income
 taxes..................         49        86       143       152       189       55       55
                           --------  --------  --------  --------  --------  -------  -------
 Net loss...............   $(11,133) $ (9,483) $ (8,713) $(10,716) $ (8,214) $(1,907) $(1,737)
                           ========  ========  ========  ========  ========  =======  =======
 Basic net loss per
  share(1)..............   $  (0.85) $  (0.67) $  (0.56) $  (0.62) $  (0.44) $ (0.10) $ (0.09)
                           ========  ========  ========  ========  ========  =======  =======
 Shares used in comput-
  ing basic net loss per
  share(1)..............     13,038    14,060    15,695    17,354    18,603   18,511   19,029
                           ========  ========  ========  ========  ========  =======  =======
 Pro forma basic net
  loss per share(1).....                                           $  (0.32) $ (0.08) $ (0.06)
                                                                   ========  =======  =======
 Shares used in comput-
  ing pro forma basic
  net loss per
  share(1)..                                                         25,756   24,399   26,916
                                                                   ========  =======  =======
</TABLE>
 
<TABLE>
<CAPTION>
                                         DECEMBER 31,
                            --------------------------------------  MARCH 31,
                             1993   1994    1995    1996    1997      1998
                            ------ ------- ------- ------- ------- -----------
CONSOLIDATED BALANCE SHEET
 DATA:                                  (IN THOUSANDS)             (UNAUDITED)
<S>                         <C>    <C>     <C>     <C>     <C>     <C>
Cash, cash equivalents and
 short-term investments.... $4,443 $24,210 $16,044 $ 8,051 $ 7,853   $ 5,165
Working capital............  4,164  25,120  17,653   7,905   8,883     7,376
Total assets...............  9,913  31,124  24,547  15,855  16,816    15,695
Total stockholders' equi-
 ty........................  1,529  22,799  15,978   7,138   8,800     7,482
</TABLE>
- --------
(1) See Note 2 of Notes to Consolidated Financial Statements for an
    explanation of shares used in computing basic net loss per share and pro
    forma basic net loss per share.
 
                                      19
<PAGE>
 
                     MANAGEMENT'S DISCUSSION AND ANALYSIS
               OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
  The following discussion of the financial condition and results of
operations of the Company should be read in conjunction with the Consolidated
Financial Statements and related Notes thereto included elsewhere in this
Prospectus. This Prospectus contains forward-looking statements that involve
risks and uncertainties. The Company's actual results may differ significantly
from the results discussed in the forward-looking statements. Factors that may
cause such a difference include, but are not limited to, those discussed in
"Risk Factors."
 
OVERVIEW
 
  The Company was founded and began operations in February 1988. The Company
develops, markets and supports a family of hardware and software products and
services that enables OEMs and systems integrators to design and implement
open, interoperable, distributed control networks. The Company offers its
products and services to OEMs and systems integrators in the building,
industrial, transportation, home and other automation markets. The Company
provides a variety of technical training related to its products and
underlying technology as well as customer support to its customers on a per
incident or annual contract basis.
 
  After incorporation, the Company initially focused on research that led to
the development of LonWorks technology. The Company's first product, the
LonBuilder Developer's Kit, was shipped in April 1991. In November 1991, the
first LonUsers International Conference was held, and in December 1991,
shipments of the Neuron Chip, which incorporates the Company's LonTalk
protocol, began. In January 1992, the Company introduced LonManager API for
DOS, which was its first software development product, and in February 1992,
the Company shipped the first of its control and connectivity products. In May
1994, the LonMark Interoperability Association was founded. In January 1998,
the Company signed its first Network Integrator Program participant.
 
  The Company markets its products and services in North America, Europe,
Japan and selected Asia-Pacific countries through a direct sales organization
augmented with the use of third-party distributors. International sales, which
include both export sales and sales by the Company's international
subsidiaries, accounted for 57.0% and 54.7% of total revenues for the three
months ended March 31, 1998 and 1997, respectively, and 57.5%, 53.6% and 52.0%
for fiscal 1997, 1996 and 1995, respectively. The Company believes that
revenues from Asian operations may grow more slowly than for other
international markets in part due to the current economic crisis in Asia.
Revenues from Asian operations for the year-to-date are generally consistent
with the Company's lowered expectations but are not expected to have a
significant impact on the Company's liquidity or results of operations. In
1997, 10.7% of the Company's revenues were denominated in currencies other
than the U.S. dollar, principally the Japanese Yen. However, this percentage
may increase over time as the Company responds to market requirements to sell
its products and services in local currencies, such as the forthcoming Euro.
As a result, the Company's operations and the market price of its products may
be directly affected by economic and political conditions in the countries
where the Company does business. Additional risks inherent in the Company's
international business activities include currency fluctuations, unexpected
changes in regulatory requirements, tariffs and other trade barriers. The
Company expects that international sales will continue to constitute a
significant portion of total revenues. See "Risk Factors--International
Operations; Currency Fluctuations."
 
  The Company derives its revenues primarily from the sale and licensing of
its products and, to a lesser extent, from fees associated with training and
technical support offered to its customers. Product revenues consist of
revenues from sales of transceivers, control modules, routers, network
interface devices and development tools and from licenses for network services
software products. Revenues from software licensing arrangements have not been
significant to date. Service revenues consist of product support (including
software post-contract support services) and training. The Company recognizes
revenue from product sales at the time of shipment to the customer. Estimated
reserves for warranty costs as well as for sales returns and allowances
related to anticipated return of products sold to distributors with limited
rights of return, which have not been material to the Company's financial
results, are recorded at the time of sale. Revenue from software sales is
recognized upon
 
                                      20
<PAGE>
 
shipment of the software if there are no significant post-delivery obligations
and if collection is probable, The Company generally has not had any
significant post-delivery obligations associated with the sale of its
products. Service revenues are generally recognized as the services are
performed. See Note 2 of Notes to Consolidated Financial Statements.
 
  In connection with the issuance of stock options to employees during the
three months ended March 31, 1998, the Company has recorded deferred
compensation in the aggregate amount of approximately $530,000, representing
the difference between the deemed fair value of the Company's Common Stock and
the exercise price of the stock options at the date of grant. The Company is
amortizing the deferred compensation expense over the shorter of the period in
which the employee, director or consultant provides services or the applicable
vesting period, which is typically 48 months. For the three-month period ended
March 31, 1998, amortization expense was approximately $11,000. Deferred
compensation is decreased in the period of forfeiture arising from the early
termination of an option holder's services. No compensation expense related to
any other periods presented has been recorded.
 
  The Company has experienced operating losses in each of its last five fiscal
years. During this period, the Company has made significant investments in
product development to implement open control networks. Such development
projects included development of transceivers, control modules, routers,
network interface devices, network management software and the LonPoint
System. Furthermore, because the Company's strategy is significantly dependent
upon achieving broad adoption of its LonWorks technology across many
industries worldwide, the Company has incurred significant selling and
marketing expense promoting its products. Between 1993 and 1997, the Company's
annual compound growth rate of product development and sales and marketing
expenses has been approximately 6%. The Company currently believes it is
unlikely that its future rate of growth of product development and sales and
marketing expenses will fall below historical levels. Additionally, the
Company believes that it has priced its products at competitive levels to
ensure broad adoption of LonWorks technology. The Company continues to invest
significantly in product development, sales and marketing, and to the extent
such expenditures do not result in significant increases in revenues, the
Company will continue to incur operating losses for the foreseeable future and
the Company's business, operating results and financial condition will be
materially and adversely affected. See "Risk Factors--History of Losses;
Accumulated Deficit; Anticipated Continuing Losses; Uncertainty of Future
Operating Results."
 
  The Company has experienced, and expects to continue to experience,
significant variability in its quarterly and annual results due to a number of
factors, many of which are outside of the Company's control. The Company
believes that one of the factors in such variability is the fluctuation in the
rates at which OEMs purchase the Company's products and services, which is
impacted by OEMs' own business cycles. See "Risk Factors--Fluctuations in
Operating Results." Another factor in such variability is the timely
introduction of new products. From time to time, the introduction of new
products by the Company has been delayed beyond the Company's projected
shipping date. In each instance, such delays have resulted in increased costs
and delayed revenues. Because future revenues are dependent on the timely
introduction of new product offerings, any such future delays could have a
material adverse effect on the Company's business, operating results and
financial condition. See "Risk Factors--New Products and Rapid Technological
Change." The Company's expense levels are based, in significant part, on
expectations of future revenues. Consequently, if revenue levels are below
expectations, expense levels could be disproportionately high as a percentage
of total revenues, and operating results would be immediately and adversely
affected. The Company has failed to meet its expectations of future revenues
in the past. See "Risk Factors--Fluctuations in Operating Results." In
addition, the growth of the Company's revenues has been adversely affected by
declines in sales of existing products over time. For example, the LonBuilder
Developer's Workbench represented approximately 18% of the Company's revenues
during 1995 but has not represented a significant percentage of total revenues
since that time.
 
  At March 31, 1998, the Company had an accumulated deficit of $86.4 million.
As of December 31, 1997, the Company had net operating loss carryforwards for
Federal and state income tax reporting purposes of approximately $76.0 million
and $5.0 million, respectively, which expire at various dates through 2012. In
addition, as of December 31, 1997, the Company had tax credit carryforwards of
approximately $3.5 million,
 
                                      21
<PAGE>
 
which expire at various dates through 2012. The Internal Revenue Code of 1986,
as amended, contains provisions that may limit the net operating loss and
credit carryforwards available for use in any given period upon the occurrence
of certain events, including a significant change in ownership interests. The
Company had deferred tax assets, including its net operating loss
carryforwards and tax credits, totaling approximately $33.6 million as of
December 31, 1997. A valuation allowance has been recorded for the entire
deferred tax asset as a result of uncertainties regarding the realization of
the asset balance due to the history of losses and the variability of
operating results. See "Risk Factors--History of Losses; Accumulated Deficit;
Anticipated Continuing Losses; Uncertainty of Future Operating Results" and
Note 7 of Notes to Consolidated Financial Statements.
 
RECENT RESULTS OF OPERATIONS
 
  The Company's second quarter ended on June 30, 1998. Total revenues for the
quarter were $8.5 million, net loss was ($1.2 million), basic net loss per
share was ($0.06) (based on weighted average shares outstanding of 19,381,151)
and pro forma basic net loss per share was ($0.04) (based on weighted average
shares outstanding of 27,268,532).
 
RESULTS OF OPERATIONS
 
  The following table sets forth, for the periods indicated, the percentage of
total revenues represented by each item in the Company's Consolidated
Statement of Operations:
 
<TABLE>
<CAPTION>
                                      YEAR ENDED             THREE MONTHS
                                     DECEMBER 31,          ENDED MARCH 31,
                                   ---------------------   ------------------
                                   1995    1996    1997      1997      1998
                                   -----   -----   -----   --------   -------
Revenues:                                                    (UNAUDITED)
<S>                                <C>     <C>     <C>     <C>        <C>
  Product.........................  86.5%   86.3%   87.1%      87.6%     90.3%
  Service.........................  13.5    13.7    12.9       12.4       9.7
                                   -----   -----   -----   --------   -------
   Total revenues................. 100.0   100.0   100.0      100.0     100.0
Cost of revenues:
  Cost of product.................  40.4    44.8    41.6       41.6      40.8
  Cost of service.................   4.9     4.8     6.4        6.1       6.8
                                   -----   -----   -----   --------   -------
   Total cost of revenues.........  45.3    49.6    48.0       47.7      47.6
                                   -----   -----   -----   --------   -------
   Gross profit...................  54.7    50.4    52.0       52.3      52.4
                                   -----   -----   -----   --------   -------
Operating expenses:
  Product development.............  31.5    31.4    25.1       23.3      24.6
  Sales and marketing.............  46.6    48.3    42.9       40.3      38.1
  General and administrative......  18.8    16.3    14.1       14.7      11.7
                                   -----   -----   -----   --------   -------
   Total operating expenses.......  96.9    96.0    82.1       78.3      74.4
                                   -----   -----   -----   --------   -------
   Loss from operations........... (42.2)  (45.6)  (30.1)    ( 26.0)    (22.0)
                                   -----   -----   -----   --------   -------
Other income (expense):
  Interest income, net............   4.8     2.2     1.5        0.9       0.8
  Other income (expense), net.....   0.7    (0.6)    0.2        0.3       0.1
                                   -----   -----   -----   --------   -------
   Total other income (expense)...   5.5     1.6     1.7        1.2       0.9
                                   -----   -----   -----   --------   -------
   Loss before provision for in-
    come taxes.................... (36.7)  (44.0)  (28.4)     (24.8)    (21.1)
Provision for income taxes........   0.6     0.7     0.6        0.7       0.7
                                   -----   -----   -----   --------   -------
  Net loss........................ (37.3)% (44.7)% (29.0)%    (25.5)%   (21.8)%
                                   =====   =====   =====   ========   =======
</TABLE>
 
THREE MONTHS ENDED MARCH 31, 1998 COMPARED TO THREE MONTHS ENDED MARCH 31,
1997
 
  Revenues
 
  Total revenues for the three months ended March 31, 1998 increased to $8.0
million from $7.5 million in the same period of 1997, an increase of 6.5%. For
the three months ended March 31, 1998, one customer, EBV,
 
                                      22
<PAGE>
 
the sole distributor of the Company's products in Europe since December 1997,
accounted for 20.6% of total revenues. For the three months ended March 31,
1997, no customer accounted for greater than 10% of total revenues.
 
  Product. Product revenues for the three months ended March 31, 1998
increased to $7.2 million from $6.5 million in the same period of 1997, an
increase of 9.8%. For the three months ended March 31, 1998, product revenues
as a percentage of total revenues increased to 90.3% from 87.6% in the same
period of 1997. This increase was primarily due to the market's growing
acceptance of the Company's products and underlying technology, especially its
control and connectivity products which increased by $1.2 million, and an
expansion of the Company's product offerings.
 
  Service. Service revenues for the three months ended March 31, 1998
decreased to $771,000 from $926,000 in the same period of 1997, a decrease of
16.7%. For the three months ended March 31, 1998, service revenues as a
percentage of total revenues decreased to 9.7% from 12.4% in the same period
of 1997. This decrease was due primarily to the timing and the number of
technical training courses offered by the Company.
 
  Cost of Revenues
 
  Cost of product. Cost of product revenues consist of costs associated with
the purchase of components and subassemblies, as well as allocated labor,
overhead and manufacturing variances associated with the packaging,
preparation and shipment of products. Cost of product revenues for the three
months ended March 31, 1998 increased to $3.2 million from $3.1 million in the
same period of 1997, an increase of 4.4%, representing product gross margins
of 54.8% and 52.5%, respectively. The increase in product gross margins was
primarily due to a change in product mix as a result of the expansion of new
product offerings as well as, to a lesser extent, a general increase in
volumes of products shipped by the Company.
 
  Cost of service. Cost of service revenues consist of employee-related costs
as well as direct costs incurred in providing training and customer support
services. Cost of service revenues for the three months ended March 31, 1998
increased to $543,000 from $455,000 in the same period of 1997, an increase of
19.3%, representing service gross margins of 29.6% and 50.9%, respectively.
The decrease in service gross margins was due primarily to the decline in
service revenues.
 
  Operating Expenses
 
  Product development. Product development expenses consist primarily of
payroll and related expenses, expensed material and facility costs associated
with the development of new technologies and products. Product development
expenses for the three months ended March 31, 1998 increased to $2.0 million
from $1.7 million in the same period of 1997, representing 24.6% and 23.3%,
respectively, of total revenues. The dollar amount and percentage increases
were primarily the result of increased salaries and other costs related to the
hiring of additional engineering personnel to support the development of new
and existing products.
 
  Sales and marketing. Sales and marketing expenses consist primarily of
payroll and related expenses including commissions to sales personnel, travel
and entertainment, advertising and product promotion and facilities costs
associated with the Company's sales and support offices. Sales and marketing
expenses for the three months ended March 31, 1998 remained flat at $3.0
million from the same period of 1997, representing 38.1% and 40.3%,
respectively, of total revenues. The decrease in sales and marketing expense
as a percentage of total revenues was due primarily to the larger revenue base
in 1998.
 
  General and administrative. General and administrative expenses consist
primarily of payroll and related expenses for executive, accounting and
administrative personnel, insurance, professional fees and other general
corporate expenses. General and administrative expenses for the three months
ended March 31, 1998 decreased to $935,000 from $1.1 million in the same
period in 1997, representing 11.7% and 14.7%, respectively, of total revenues.
The dollar amount and percentage decreases were attributable to a decrease in
administrative personnel and outside services.
 
                                      23
<PAGE>
 
  Interest income, net. Interest income, net reflects interest earned by the
Company on its cash and short-term investment balances. Interest income, net
for the three months ended March 31, 1998 decreased to $67,000 from $71,000 in
the same period of 1997.
 
  Other income (expense), net. Other income (expense), net consists primarily
of purchase discounts and foreign transaction gains and losses. Other income
(expense), net for the three months ended March 31, 1998 decreased to $8,000
from $21,000 in the same period of 1997.
 
  Provision for income taxes. Income taxes consist of income taxes related to
certain of the Company's foreign subsidiaries. Income taxes were $55,000 for
each of the three months ended March 31, 1998 and 1997.
 
FISCAL YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
  Revenues
 
  Total revenues for fiscal 1997, 1996 and 1995 were $28.3 million, $24.0
million and $23.3 million, respectively, representing increases of 18.0% and
2.8%, respectively. EBV accounted for 10.9% and 12.0% of total revenues in
fiscal 1997 and 1995, respectively. In 1996, no single customer accounted for
10% or more of total revenues.
 
  Product. Product revenues for fiscal 1997, 1996 and 1995 were $24.7 million,
$20.7 million and $20.2 million, respectively, representing increases of 19.1%
and 2.6%, respectively. Product revenues as a percentage of total revenues
were 87.1%, 86.3% and 86.5%, for fiscal 1997, 1996 and 1995, respectively. The
increase in 1997 as compared to 1996 was due to the market's growing
acceptance of the Company's control and connectivity products which increased
by $4.4 million and an expansion of the Company's product offerings,
particularly its network services products. For both dollar amounts and as a
percentage of total revenues, product revenues were relatively flat between
1996 and 1995 due to the fact that increases in sales of control and
connectivity products of $3.1 million were partially offset by decreases in
sales of development tools of $1.7 million.
 
  Service. Service revenues for fiscal 1997, 1996 and 1995 were $3.6 million,
$3.3 million and $3.2 million, respectively, representing increases of 10.8%
and 3.9% respectively. Service revenues as a percentage of total revenues were
12.9%, 13.7% and 13.5% for fiscal 1997, 1996 and 1995, respectively. The
increase in 1997 service revenues as compared to 1996 reflects increased
customer support revenues as a result of the increased installed base of the
Company's products.
 
  Cost of Revenues
 
  Cost of product. Cost of product revenues for fiscal 1997, 1996 and 1995
were $11.8 million, $10.8 million and $9.4 million, respectively, representing
product gross margins of 52.3%, 48.0% and 53.3%, respectively. The increases
in dollar amounts were due primarily to the additional product costs
associated with increased volumes. The increase in product gross margin in
1997 as compared to 1996 was due primarily to decreased operations spending as
a percentage of revenue related to flat spending levels and a decrease in
manufacturing variances of $315,000. The decrease in product gross margin in
1996 as compared to 1995 was due to flat revenue growth and increased cost of
products related primarily to a change in product mix towards lower margin
volume products.
 
  Cost of service. Cost of service revenues for fiscal 1997, 1996 and 1995
were $1.8 million, $1.1 million and $1.1 million, respectively, representing
service gross margins of 50.2%, 65.2% and 63.9%, respectively. The increase in
dollar amount in fiscal 1997 as compared to 1996 was primarily the result of
an increase in the number of customer support and training personnel. The
decrease in service gross margin in 1997 as compared to 1996 was due primarily
to higher cost of service growth compared to service revenue growth. The
increase in service gross margin in 1996 as compared to 1995 was due to
slightly higher revenue growth in 1996 as the spending levels over the same
period remained unchanged.
 
 
                                      24
<PAGE>
 
  Operating Expenses
 
  Product development. Product development expenses for fiscal 1997, 1996 and
1995 were $7.1 million, $7.5 million and $7.4 million, respectively,
representing 25.1%, 31.4% and 31.5% of total revenues, respectively. The
decrease in product development expenses in 1997 as compared to 1996 was due
primarily to the transition of Company personnel from product development to
the direct support of the Company's existing customers. The increase in
product development expenses in 1996 as compared to 1995 was due primarily to
investments made by the Company in technology development.
 
  Sales and marketing. Sales and marketing expenses for fiscal 1997, 1996 and
1995 were $12.1 million, $11.6 million and $10.9 million, respectively,
representing 42.9%, 48.3% and 46.6% of total revenues, respectively. The
dollar amount increases, in each succeeding year, were primarily due to
personnel related expenses. The Company's expenses in international sales
offices in 1997 were lower than 1996 primarily due to an overall strengthening
of the U.S. dollar against most of the functional currencies used in the
international sales office operations. The increase in percentage of total
revenues in 1996 as compared to 1995 reflected an increase in fixed selling
expenses to support anticipated revenue growth in 1996.
 
  General and administrative. General and administrative expenses for fiscal
1997, 1996 and 1995 were $4.0 million, $3.9 million and $4.4 million,
respectively, representing 14.1%, 16.3% and 18.8% of total revenues,
respectively. The decrease in percentage of total revenues in 1997 compared to
1996 was due to relatively similar spending levels spread over a larger
revenue base. The decreases in dollar amounts and percentage of total revenues
in 1996 compared to 1995 were due primarily to reduced spending related to
regulatory measures associated with an FCC rulemaking related to cable
compatibility. See "Risk Factors--Regulatory Actions."
 
  Interest Income, net. Interest income, net for fiscal 1997, 1996 and 1995
was $429,000, $536,000 and $1.1 million, respectively, representing 1.5%, 2.2%
and 4.8% of total revenues, respectively. The decreases in interest income
were due to lower cash and short-term investment balances.
 
  Other income (expense), net. Other income (expense), net for fiscal 1997,
1996 and 1995 was $68,000, ($163,000) and $175,000, respectively. The amount
in other income (expense), net in 1997 was primarily due to income from
purchase discounts taken in 1997. The amount in other income (expense), net in
1996 as compared to 1995 was due primarily to foreign transaction losses
incurred in 1996 and foreign transaction gains incurred in 1995 both primarily
related to the fluctuations of the U.S. dollar against the Japanese Yen.
 
  Provision for income taxes. Income taxes for 1997, 1996 and 1995, which
consists of income taxes related to certain of the Company's foreign
subsidiaries, were $189,000, $152,000 and $143,000, respectively.
 
 
                                      25
<PAGE>
 
QUARTERLY RESULTS OF OPERATIONS
 
  The following table sets forth certain consolidated statement of operations
data for each of the five quarters in the period ended March 31, 1998, as well
as the percentage of total revenues for the periods indicated. This
information has been derived from the Company's unaudited consolidated
financial statements. The unaudited consolidated financial statements have
been prepared on the same basis as the audited consolidated financial
statements contained herein and include all adjustments, consisting only of
normal recurring adjustments, which the Company considers necessary for a fair
presentation of this information when read in conjunction with the Company's
Consolidated Financial Statements and Notes thereto appearing elsewhere in
this Prospectus. The results of operations for any quarter and any quarter-to-
quarter trends are not necessarily indicative of the results to be expected
for any future period.
 
<TABLE>
<CAPTION>
                                        THREE MONTHS ENDED
                              -----------------------------------------------
                               MARCH     JUNE      SEPT.     DEC.      MARCH
                               1997      1997      1997      1997      1998
                              -------   -------   -------   -------   -------
                                          (IN THOUSANDS)
 <S>                          <C>       <C>       <C>       <C>       <C>
 Revenues:
  Product..................   $ 6,548   $ 5,944   $ 5,487   $ 6,686   $ 7,188
  Service..................       926     1,036       862       813       771
                              -------   -------   -------   -------   -------
  Total revenues...........     7,474     6,980     6,349     7,499     7,959
 Cost of revenues:
  Cost of product..........     3,111     2,840     2,724     3,086     3,249
  Cost of service..........       455       445       408       502       543
                              -------   -------   -------   -------   -------
  Total cost of revenues...     3,566     3,285     3,132     3,588     3,792
                              -------   -------   -------   -------   -------
  Gross profit.............     3,908     3,695     3,217     3,911     4,167
                              -------   -------   -------   -------   -------
 Operating expenses:
  Product development......     1,740     1,724     1,751     1,906     1,958
  Sales and marketing......     3,014     3,140     2,890     3,084     3,031
  General and administra-
   tive....................     1,098       981       983       942       935
                              -------   -------   -------   -------   -------
  Total operating ex-
   penses..................     5,852     5,845     5,624     5,932     5,924
                              -------   -------   -------   -------   -------
  Loss from operations.....    (1,944)   (2,150)   (2,407)   (2,021)   (1,757)
                              -------   -------   -------   -------   -------
 Other income (expense):
 Interest income, net......        71       109       143       106        67
 Other income (expense),
  net......................        21        13        18        16         8
                              -------   -------   -------   -------   -------
  Total other income (ex-
   pense)..................        92       122       161       122        75
                              -------   -------   -------   -------   -------
  Loss before provision for
   income taxes............    (1,852)   (2,028)   (2,246)   (1,899)   (1,682)
 Provision for income tax-
  es.......................        55        35        34        65        55
                              -------   -------   -------   -------   -------
  Net loss.................   $(1,907)  $(2,063)  $(2,280)  $(1,964)  $(1,737)
                              =======   =======   =======   =======   =======
 AS A PERCENTAGE OF TOTAL
  REVENUES:
 Revenues:
  Product..................      87.6%     85.2%     86.4%     89.2%     90.3%
  Service..................      12.4      14.8      13.6      10.8       9.7
                              -------   -------   -------   -------   -------
  Total revenues...........     100.0     100.0     100.0     100.0     100.0
 Cost of revenues:
  Cost of product..........      41.6      40.7      42.9      41.1      40.8
  Cost of service                 6.1       6.4       6.4       6.7       6.8
                              -------   -------   -------   -------   -------
  Total cost of revenues...      47.7      47.1      49.3      47.8      47.6
                              -------   -------   -------   -------   -------
  Gross profit.............      52.3      52.9      50.7      52.2      52.4
                              -------   -------   -------   -------   -------
 Operating expenses:
  Product development......      23.3      24.7      27.6      25.5      24.6
  Sales and marketing......      40.3      45.0      45.6      41.1      38.1
  General and administra-
   tive....................      14.7      14.0      15.4      12.6      11.7
                              -------   -------   -------   -------   -------
  Total operating ex-
   penses..................      78.3      83.7      88.6      79.2      74.4
                              -------   -------   -------   -------   -------
  Loss from operations.....     (26.0)    (30.8)    (37.9)    (27.0)    (22.0)
                              -------   -------   -------   -------   -------
 Other income (expense):
  Interest income, net.....       0.9       1.6       2.3       1.4       0.8
  Other income (expense),
   net.....................       0.3       0.1       0.2       0.3       0.1
                              -------   -------   -------   -------   -------
  Total other income (ex-
   pense)..................       1.2       1.7       2.5       1.7       0.9
                              -------   -------   -------   -------   -------
  Loss before provision for
   income taxes............     (24.8)    (29.1)    (35.4)    (25.3)    (21.1)
 Provision for income tax-
  es.......................       0.7       0.5       0.5       0.9       0.7
                              -------   -------   -------   -------   -------
  Net loss.................     (25.5)%   (29.6)%   (35.9)%   (26.2)%   (21.8)%
                              =======   =======   =======   =======   =======
</TABLE>
 
 
                                      26
<PAGE>
 
  The Company's revenues, expenses and results of operations have been subject
to quarterly fluctuations due to a variety of factors. These factors make the
estimation and forecast of revenues difficult on a quarterly basis. The
Company plans to continue to increase its product development and sales and
marketing expenses on a quarterly basis in an effort to increase its market
share. These increases will be based in significant part on expectations of
future revenues. As a result of these and other factors, the Company believes
that its revenues and operating results are difficult to predict and are
subject to fluctuations from period to period, and that period-to-period
comparisons of its results of operations are not meaningful and should not be
relied upon as indications of future performance. See "Risk Factors--
Fluctuations in Operating Results."
 
LIQUIDITY AND CAPITAL RESOURCES
 
  Since its inception, the Company has financed its operations and met its
capital expenditure requirements primarily from the private sale of Preferred
Stock and Common Stock. From inception through March 31, 1998, the Company had
raised $94.4 million from the sale of Preferred Stock and Common Stock.
 
  Net cash used in operating activities was $2.9 million for the three months
ended March 31, 1998 and 1997. For fiscal 1997, 1996 and 1995, net cash used
in operating activities was $9.5 million, $9.0 million and $9.2 million,
respectively. Net cash used in operations is attributable primarily to the
losses from operations in each of the periods.
 
  Net cash used in investing activities was $3.6 million in fiscal 1997 and
$70,000 for the three months ended March 31, 1997. The net cash used in
investing activities reflected the shortfall of cash proceeds from the
maturities of short-term investments offset by the purchases of short-term
investments and capital expenditures. Net cash provided by investing
activities was $2.8 million for the three months ended March 31, 1998, and
$11.2 million and $6.5 million in fiscal 1996 and 1995, respectively. The net
cash provided by investing activities reflected the excess of cash proceeds
from the maturities of short-term investments offset by the purchases of
short-term investments and capital expenditures.
 
  Net cash provided by financing activities was $472,000 and $16,000 for the
three months ended March 31, 1998 and 1997, respectively, and was $10.2
million, $1.9 million and $2.0 million in fiscal 1997, 1996 and 1995,
respectively. Net cash provided by financing activities consisted primarily of
proceeds from private sales of Preferred Stock and Common Stock and the
exercise of employee stock options.
 
  At March 31, 1998, the Company's principal sources of liquidity included
cash and cash equivalents of $5.2 million. In May 1998, the Company entered
into a revolving line of credit agreement with a bank, whereby the Company may
borrow up to 85% of eligible accounts receivable, not to exceed $5.0 million.
If the credit agreement had been in effect as of April 30, 1998, the amount
available to be borrowed thereunder would have been $2.6 million. Advances
under the credit agreement bear interest at the bank's reference rate or, at
the option of the Company, at a fixed rate of interest equal to the London
interbank offered rate plus 150 basis points. As of May 31, 1998, there was
approximately $65,000 outstanding under this line of credit in the form of a
letter of credit. The credit agreement, which expires in May 1999, contains
certain negative covenants restricting the Company's ability to pay dividends
or enter into certain financial transactions. The credit agreement also
contains a minimum tangible net worth requirement, determined on a quarterly
basis.
 
  The Company believes that the proceeds from this offering, together with its
existing sources of liquidity, will satisfy the Company's projected working
capital and other cash requirements for at least the next 24 months. However,
there can be no assurance that the Company will not require additional
financing within this period or that any such financing will be available to
the Company in the amounts or at the times required by the Company, or on
acceptable terms, if at all. The failure of the Company to obtain additional
financing could have a material adverse effect on the Company's business,
operating results and financial condition.
 
 
                                      27
<PAGE>
 
NEW PRONOUNCEMENTS
 
  In June 1997, the Financial Accounting Standards Board issued SFAS No. 130,
"Reporting Comprehensive Income," which establishes standards for reporting
and presentation of comprehensive income. SFAS No. 130, which was adopted by
the Company in the first quarter of 1998, requires companies to report a new
measurement of income. "Comprehensive Income (loss)" is required to include
foreign currency translation gains and losses and other unrealized gains and
losses that have historically been excluded from net income and reflected
instead in equity. The following table reconciles comprehensive net loss under
the provisions of SFAS No. 130 for the years ended December 31, 1995, 1996 and
1997 and for the three months ended March 31, 1997 and 1998 (in thousands):
 
<TABLE>
<CAPTION>
                                       DECEMBER 31,             MARCH 31,
                                 --------------------------  ----------------
                                  1995      1996     1997     1997     1998
                                 -------  --------  -------  -------  -------
                                                               (UNAUDITED)
   <S>                           <C>      <C>       <C>      <C>      <C>
   Net loss..................... $(8,713) $(10,716) $(8,214) $(1,907) $(1,737)
   Foreign currency translation
    adjustments.................     (62)      (35)    (320)    (201)     (64)
                                 -------  --------  -------  -------  -------
   Comprehensive net loss....... $(8,775) $(10,751) $(8,534) $(2,108) $(1,801)
                                 =======  ========  =======  =======  =======
</TABLE>
 
  In June 1997, the Financial Accounting Standards Board issued SFAS No. 131,
"Disclosures About Segments of an Enterprise and Related Information," which
establishes standards for disclosure of segment information and which will be
adopted by the Company in the fourth quarter of 1998. The Company anticipates
that SFAS No. 131 will not have a material impact on its financial statements.
 
  In December 1997, the American Institute of Certified Public Accountants
("AICPA") issued Statement of Position ("SOP") 97-2 which superseded SOP 91-1,
"Software Revenue Recognition." SOP 97-2 is effective for transactions entered
into in the Company's fiscal year beginning January 1, 1998. Management has
assessed this new statement and its adoption in the first quarter of fiscal
1998 did not have a material effect on the Company's financial statements or
on the timing of the Company's revenue recognition, or cause changes to its
revenue recognition policies.
 
  In April 1998, the AICPA issued SOP 98-5 "Reporting the Costs of Start-up
Activities." SOP 98-5 is effective for the Company's fiscal year beginning
January 1, 1999. SOP 98-5 provides guidance on the financial reporting of
start-up costs and organization costs and requires such costs to be expensed
as incurred. Management believes the adoption of SOP 98-5 will not have a
material effect on the Company's financial statements.
 
                                      28
<PAGE>
 
                                   BUSINESS
 
OVERVIEW
 
  Echelon develops, markets and supports a family of hardware and software
products and services that enables OEMs and systems integrators to design and
implement open, interoperable, distributed control networks. A control network
enables any group of electrical devices, called nodes, to be linked together
to implement sensing, monitoring, control and communications capabilities for
a variety of applications. Control networks, an alternative to the traditional
approach of centralized control, offer decreased costs of installation and
maintenance and the ability to implement multi-vendor systems, thereby
increasing competition while providing expanded features, flexibility and
functionality. Echelon's control networking technology allows intelligence and
communications capabilities to be embedded into individual control devices
that can be connected together through a variety of communications media, such
as a twisted pair of wires (data cable) and the existing power lines in a
facility. The intelligent, networked control devices are then able to
communicate with each other, peer-to-peer, to perform the desired control
functions. In effect, the network becomes the controller, eliminating the need
for central controllers, significantly reducing wiring costs and enhancing
system functionality and flexibility.
 
  The Company markets its products and services to OEMs and systems
integrators in the building, industrial, transportation, home and other
automation markets. The Company sells primarily through a direct sales force
in North America and other countries where it has operations, and augments its
direct sales efforts with distributors in Europe, Japan and Asia Pacific.
Representative customers include Bombardier, Edwards, Fuji Electric, Hitachi,
Honeywell, Johnson Controls, Kawasaki, Landis & Staefa and Raytheon.
 
INDUSTRY BACKGROUND
 
  Control systems manage key functions in virtually every type of facility
that affects our daily lives, such as buildings, factories, transportation
systems and homes. These functions can be as simple as turning a light on and
off and as complex as operating a chemical production line. For example, a
common application of a control system is to enable a thermostat to
communicate with other equipment in a building to automatically adjust
temperature and airflow. In addition to interconnecting and monitoring
heating, ventilation and air conditioning ("HVAC"), control systems are used
within buildings to manage such functions as elevators, lighting, security and
access control. In industrial facilities, these systems are used to automate
semiconductor manufacturing equipment, oil pumping stations, textile dyeing
machinery and hundreds of other applications. In transportation systems,
control systems are used to regulate such features as propulsion, braking and
heating systems.
 
  Control systems consist of an array of hardware devices and software used to
collect data from the physical world and convert that data to electrical
signals. These signals, in turn, provide information that can be used to
effect responses based upon pre-programmed rules and logic. Traditionally,
most control systems have incorporated closed, centrally-controlled
architectures. These systems share many of the same drawbacks of centralized
computing architectures that rely upon mainframes and minicomputers to
communicate to "dumb" terminals that lack independent processing capabilities.
 
  Products for control systems are typically designed and manufactured by OEMs
that focus on one or more vertical markets, such as HVAC systems for
buildings, or braking control systems for trains. Control systems are
typically installed and maintained by specialty contractors, or "systems
integrators," and in some instances by the in-house installation and
maintenance divisions of OEMs. Closed, centralized control systems have a
number of inherent disadvantages for OEMs, systems integrators and end-users.
OEMs, as the designers of control systems and, in some instances, developers
of their own protocols, incur significant development and ongoing support
expense to implement and maintain their closed infrastructures. In addition,
supporting such a closed infrastructure takes valuable resources away from
developing competitive applications and limits the OEM's ability to leverage
the product development efforts of third party companies who use open
platforms. Finally, centralized systems also risk complete shutdown if the
central controller fails.
 
 
                                      29
<PAGE>
 
  For systems integrators, the installation of closed, centralized control
systems is typically characterized by the time-consuming and costly physical
task of installing large amounts of wire and conduit to connect each component
to one or more central controllers. Once the physical infrastructure is
installed, specially-trained and highly-skilled personnel must program,
install and "debug" detailed control logic software into the controllers in
order to manage the disparate components. To the extent that a facility
incorporates control systems from more than one OEM, systems integrators also
spend considerable time connecting systems that were not designed to
interoperate, such as HVAC and fire/life/safety systems. This complex process
also makes modifications to the system expensive and time consuming. Because
of the excessive costs of installing and modifying closed, centrally-
controlled systems, end-users, who ultimately must pay for these products and
services, often cannot acquire new applications at an affordable cost. The
Company believes that these factors have reduced the market opportunity for
both OEMs and systems integrators to sell new products, functions and
applications to end-users.
 
  OEMs, systems integrators and end-users are increasingly seeking to overcome
the limitations of closed, centralized systems. As with the computer
industry's move away from centralized computing architectures, the Company
believes that across a broad range of control applications, the control
industry is moving away from custom, wiring-intensive and closed
interconnection schemes among various system components, towards open,
interoperable, distributed architectures in which the control intelligence
resides among the sensors and actuators in an intelligent network, rather than
in central controllers.
 
THE ECHELON SOLUTION
 
  Echelon develops, markets and supports a family of hardware and software
products and services that enables OEMs and systems integrators to design and
implement open, interoperable, distributed control networks. Echelon's
networking technology allows intelligence and communications capabilities to
be embedded into individual control devices that can be connected together
through a variety of communications media such as a twisted pair of wires
(data cable) and the existing power lines in a facility. The intelligent,
networked control devices are then able to communicate with each other, peer-
to-peer, to perform the desired control functions. For example, a temperature
sensor might detect a change in temperature and send a message over the
network that is received and acted upon by other devices that have been
configured to accept the message. In effect, the network becomes the
controller, eliminating the need for central controllers, significantly
reducing wiring costs and enhancing system functionality and flexibility.
 
  The Company offers a comprehensive set of products and services that
provides the infrastructure and support required to build and implement open,
multi-vendor, interoperable, control network solutions for building,
industrial, transportation, home and other automation markets. The Company's
products are based on its LonWorks networking technology, an open standard for
interoperable networked control. In a LonWorks control network, intelligent
control devices, called nodes, communicate using the Company's LonTalk
protocol. Each node in the network contains embedded intelligence that
implements the protocol and performs local sense and control functions. At the
core of this embedded intelligence is the Neuron Chip, an integrated circuit
that was initially designed by Echelon and is currently manufactured and sold
by Motorola and Toshiba. In addition, the Company offers transceivers that
couple the Neuron Chip to the communications medium; control modules that are
intended to help to reduce OEM development cost; intelligent LonWorks routers
that allow users to build large systems containing different networking media;
network interfaces that connect computers to the network; development tools
that allow OEMs to design LonWorks technology into their products; and
software tools and toolkits that allow users to install, monitor, maintain and
control their systems.
 
 
                                      30
<PAGE>
 
  The diagrams below compare a control application implemented in a closed,
centralized control system architecture with the same application implemented
using Echelon's LonWorks distributed control network solution.
 
               [GRAPHIC DEPICTING CLOSED CENTRAL ARCHITECTURE]

         TRADITIONAL CLOSED, CENTRALLY-CONTROLLED SYSTEM ARCHITECTURE
 
 
                  [GRAPHIC DEPICTING OPEN CONTROL NETWORK]

           ECHELON'S OPEN, DISTRIBUTED CONTROL NETWORK ARCHITECTURE

  Based on the Company's past experience in implementing its products, the
Company believes that its family of products and services provides the
following benefits to its customers:
 
 .  Installation Cost Savings. LonWorks based open control networks are
   intended to be less expensive to install than closed, centrally-controlled
   systems. By replacing individual hard-wired connections with shared network
   channels, the Company believes that wiring and conduit material and labor
   costs can be substantially reduced. By eliminating the need to program and
   debug complex control logic software, systems can be designed and
   commissioned more quickly by personnel with less specialized training. In
   addition, LonWorks based networks are designed not to require expensive,
   performance-limiting gateways (which are used to enable communication
   between disparate systems) to connect control systems from multiple
   vendors.
 
 .  Life-Cycle Cost Savings. LonWorks networks can eliminate many of the
   sources of high life-cycle costs found in traditional control systems. By
   providing an open, interoperable platform, LonWorks networks allow end-
   users to select the most cost-effective products and services for their
   applications from a broad range of OEMs. In addition, the Company believes
   that the inherent flexibility of the LonWorks network architecture permits
   modifications to the control system, including adding new products,
   features and functions, to be made at significantly lower cost. LonWorks
   technology also enables devices to be logically "rewired" across the
   network without the need to run new physical wire or to replace or
   reprogram devices.
 
 .  Improved Quality and Functionality. With LonWorks networks, end-users may
   customize their control networks to their specific needs by incorporating
   products and applications from an array of applications providers. In open
   LonWorks networks, any piece of information from any device can easily be
   shared with any other device in the same control system, in a different
   control system, or in a computer system, without the need for custom
   programming or additional hardware. For example, a measurement system can
   analyze information from a manufacturing system and send back improvements
   within seconds
 
                                      31
<PAGE>
 
   if the two systems communicate directly, rather than through a process where
   information is gathered and communicated manually over days or even weeks.
 
 .  Improved Reliability. In a fully-distributed LonWorks control network, there
   is no single point of failure. Typically, the failure of a device on the
   network only affects a small subset of devices with which it interacts.
   Unlike devices in a centrally-controlled system, devices in a LonWorks
   network are "self-aware" and can take appropriate actions, such as returning
   to default set-points, to adapt to the error condition. In addition, by
   utilizing its built-in processing power, each device can keep track of its
   own status and can report problems before they occur.
 
 .  Increased Market Demand. The Company believes that by eliminating high-cost
   centralized controllers and fostering interoperability between devices,
   LonWorks technology enables both OEMs and systems integrators to create low-
   cost, customized solutions to satisfy market demands that have not been met
   by traditional control systems.
 
STRATEGY
 
  Echelon's objective is to be the leading supplier of products and services
used in the growing market for open, interoperable control networks. Key
elements of the Company's strategy to accomplish this objective include:
 
 .  Extend Technological Leadership. Echelon's LonWorks networking technology is
   the foundation for a low-cost, flexible, interoperable and reliable platform
   for implementing networked control applications. The Company intends to
   leverage its position as the developer of the LonWorks platform, along with
   its expertise in networking software, distributed control systems and
   digital and analog circuit design, to deliver a full range of highly-
   functional and cost-effective products and systems that meet its customers'
   needs.
 
 .  Target Industry-Leading OEM Customers. The Company seeks to develop broad
   industry support for its LonWorks platform. To help accomplish this
   objective, the Company works closely with industry-leading OEMs, such as
   Bombardier, Edwards and Honeywell, in the product design process and invests
   in programs that enable these customers to develop, market and support their
   products. The Company believes that close collaborative relationships with
   OEM customers will continue to accelerate the transition of its targeted
   industries toward open, multi-vendor architectures for control networks.
 
 .  Develop Systems Integrator Distribution Channel. The Company believes that
   end-users increasingly prefer multi-vendor control networks in order to
   decrease life-cycle costs and improve the functionality of their control
   systems. In order to capitalize on this opportunity, the Company complements
   its OEM distribution channel by aggressively targeting independent systems
   integrators as an additional channel to install, configure and maintain
   highly-functional control networks for end-users. To more effectively meet
   the needs of systems integrators, the Company recently released its LonPoint
   System, which provides the infrastructure needed to implement open,
   interoperable, distributed control networks. The Company intends to continue
   promoting the benefits of the LonWorks technology and products to systems
   integrators and end-users as a means to create stronger demand for its
   control network solutions.
 
 .  Increase Penetration of Existing Vertical Markets. While the Company's
   control network products are applicable across a broad range of industries,
   the Company intends to continue to focus its marketing efforts on those
   vertical markets in which it has established a large customer base, namely
   the building, industrial, transportation and home automation industries. The
   Company works closely with OEMs and systems integrators in these vertical
   markets to identify market needs, and targets its product development
   efforts to meet those needs. For instance, in 1997, the Company began
   shipping its network operating system, LonWorks Network Services, in
   response to the needs of OEMs for a multi-user platform to install,
   maintain, monitor and interface with control networks. In addition, the
   Company established the LonMark Interoperability Association in May 1994 to
   facilitate the development and implementation of interoperable LonWorks
   based control systems within various industries. Several industry leaders in
   the Company's targeted markets have announced and currently promote products
   that conform to these standards.
 
 
                                       32
<PAGE>
 
 .  Integrate LonWorks Control Networks with Enterprise Data Networks. The
   Company believes that the seamless integration between LonWorks control
   networks and enterprise data networks is important to enable end-users to
   remotely monitor and manage their control networks, as well as to collect
   and analyze data generated by their control networks. To meet this market
   demand, the Company is developing systems and technology that combine
   standard data networking and communications protocols with the Company's
   products and technology. In support of this effort, the Company recently
   entered into a strategic agreement with Toshiba and a non-binding
   memorandum of understanding with Cisco to develop products that integrate
   LonWorks control networks with enterprise data networks.
 
 .  Leverage International Market Opportunities. With sales and marketing
   operations in 10 countries and 57.5% of the Company's total revenues in
   1997 attributable to international sales, the Company has established a
   significant international presence. The Company plans to continue to devote
   significant resources to international sales, marketing and product
   development efforts to capitalize on markets for control networks outside
   of the United States. For example, the Company's most popular power line
   transceiver was designed to meet the requirements imposed by regulators in
   both North America and Europe, enabling OEMs to leverage their product
   development programs across these markets.
 
MARKETS, APPLICATIONS AND CUSTOMERS
 
  The Company markets its products and services primarily in North America,
Europe, Japan and selected Asia Pacific countries. The Company's target
markets include:
 
  Building Automation. Companies worldwide are using LonWorks control networks
in most facets of the building automation industry, including access control,
automatic doors, elevators, energy management, fire/life/safety, HVAC,
lighting, metering, security and window blinds. The Company believes that
LonWorks networks are widely accepted because they lower installed system
cost, reduce ongoing life-cycle costs and increase functionality. For example,
a major automation project is currently being completed for British Airways'
new combined business center, BA Waterside, near Heathrow Airport. The project
uses LonWorks control networks throughout the six building campus to connect
the building management, lighting and access control systems together in a
unified system. Echelon's OEM customers in the building automation market
include Honeywell, Johnson Controls, Landis & Staefa, Philips Lighting B.V.,
Schindler Elevator Corp. and Siebe.
 
  Industrial Automation. LonWorks control networks are found in semiconductor
fabrication plants, gas compressor stations, gasoline tank farms, oil pumping
stations, water pumping stations, textile dyeing machinery, pulp and paper
processing equipment, automated conveyor systems and many other industrial
environments. In such industrial installations, LonWorks networks can replace
complex wiring harnesses, reduce installation costs, eliminate expensive
programmable logic controllers and distribute control among sensors, actuators
and other devices, thereby reducing system costs, improving control and
eliminating the problem of a single point of failure, among other things. For
example, Edwards, a leading supplier of vacuum pumping systems to the
semiconductor industry, is using LonWorks control networks within each pumping
station to replace complex wiring used to connect various motors, sensors,
actuators and displays. The same control network is extended to connect up to
400 pumping stations together in a semiconductor fabrication plant to form a
complete pumping system. Echelon's OEM customers in the industrial automation
market include Brooks Instrument, Edwards, Fuji Electric, Hitachi, Lam
Research Corporation and Marley Pump.
 
  Transportation. Echelon's technology is used in important transportation
applications, including railcars, light rail, buses, motor coaches, fire
trucks, naval vessels and aircraft. LonWorks networks can be used in these
transportation systems to improve efficiency, reduce maintenance costs and
increase safety and comfort. LonWorks technology has been specified as the
standard for electro-pneumatic braking for freight transportation trains by
the American Association of Railroads, and as one of the standards by the New
York City Transit Authority for the replacement of its subway cars. Key OEMs
in the transportation market include Bombardier, Cummins Engine, Kawasaki and
Raytheon.
 
                                      33
<PAGE>
 
  Home Automation and Other. While the home automation market is still in its
infancy, numerous companies are now selling LonWorks based products for HVAC,
lighting, security, utility meters and whole house automation. A number of
utility companies located throughout the world, including CSW Communications
(the holding company for Central and Southwest Utilities), Detroit Edison and
Enron Energy Services in the United States, and Sydkraft and Scottish Hydro
Electric in Europe, currently are pursuing residential projects involving
LonWorks networks. Other industries in which LonWorks control networks have
been utilized or are being developed for use include telecommunications
(including alarm systems for switching equipment), agriculture (including
feeding and watering systems) and medical instrumentation (including the use
of CAT scans to create holographic images).
 
PRODUCTS AND SERVICES
 
  The Company offers a comprehensive set of over 80 products and services
marketed under the LonWorks brand name that provide the infrastructure and
support required to implement and deploy open, interoperable, control network
solutions. All of the Company's products either incorporate or operate with
the Neuron Chip and the LonTalk protocol. While the Company recommends broad
use of various of its products with other Echelon products, there is no
inherent requirement for a customer to do so, given the Company's open
networking technology. For instance, a customer's product could incorporate a
transceiver purchased from the Company but could be installed with software
that did not incorporate the Company's network operating system.
 
  LonWorks Control and Connectivity Products. This suite of hardware products,
some with embedded firmware, serves as the physical interface between the
control software resident on the managed devices and the cabling and wiring
infrastructure. These products include a variety of transceivers, control
modules, routers and network interface devices. Standard, off-the-shelf
LonWorks transceivers and control modules simplify the development of LonWorks
nodes, provide the foundation for interoperability and reduce the development
cost and time for an OEM's product development. LonWorks routers provide
transparent support for multiple media, which makes it possible to signal
between different types of media, such as twisted pair, power line, radio
frequency, optical fiber and infrared. Routers can also be used to control
network traffic and partition sections of the network from traffic in another
area, increasing the total throughput and speed of the network. Network
interfaces can be used to connect computers to a LonWorks network. The
Company's FTT-10 transceiver product, one of the LonWorks Control and
Connectivity products, and the FTT-10A successor product, which permits
communication over a twisted pair of wires, together have generated
approximately 19% and 21% of the Company's revenues during the year ended
December 31, 1997 and the three month period ended March 31, 1998,
respectively. The FTT-10 was released in May 1994 and the FTT-10A was released
in May 1997.
 
  LonWorks Network Services ("LNS"). Echelon's network operating system, LNS,
serves as the platform for installing, maintaining, monitoring and interfacing
with control networks. The LNS family of products adds the power of client-
server architecture and component-based software design into control systems
and allows tools from multiple vendors to work together. The Company's most
recent release of LNS is version 1.5, which was first shipped in December
1997.
 
  The LonMaker for Windows tool, built on the LNS network operating system and
the Visio technical drawing package, gives users a familiar, CAD-like
environment in which to design their network's control system. The graphical
nature of the LonMaker tool provides an intuitive interface for designing,
installing and maintaining multi-vendor, open, interoperable LonWorks control
networks. LNS also allows multiple users, each running their own copy of
LonMaker for Windows or other LNS-based tools, to utilize the system in
parallel, thereby streamlining the design and commissioning process, and
facilitating future adds, moves and changes. LonMaker for Windows, released in
version 1.0, was first shipped in June 1998.
 
  LonPoint System Products. In the second quarter of 1998, the Company began
shipment of the LonPoint System, which provides the infrastructure to
implement open, interoperable, distributed control networks. In contrast to
traditional closed, centrally-controlled systems, the LonPoint System offers a
flat network architecture
 
                                      34
<PAGE>
 
in which every device performs control processing. Distributing the processing
throughout the network lowers installation and overall life-cycle costs,
increases reliability by eliminating central points of failure, and provides
the flexibility to adapt the system to a wide variety of applications.
 
  The LonPoint System includes a family of hardware and software products.
Hardware products include interface modules (which convert a variety of legacy
digital and analog sensors and actuators into intelligent and interoperable
network devices), routers (which provide transparent connectivity and
intelligent message passing between various combinations of standard LonWorks
media), and scheduler modules (which provide system timekeeping and state
coordination). The LonPoint System is installed using the LonMaker for Windows
tool and includes LNS software plug-ins that provide end-users with a
customized configuration view of each LonPoint module, thereby reducing the
time and training required to configure LonPoint interface modules.
 
  Development Tools. Echelon provides development tools that are used by an
OEM to design LonWorks technology into the OEM's products. The LonBuilder
Developer's Workbench integrates a complete set of tools for developing
LonWorks based control networks. These tools include an environment for
developing and debugging applications at multiple nodes, a network manager to
install and configure these nodes, and a protocol analyzer to examine network
traffic to ensure adequate capacity and to debug errors. The LonBuilder
Developer's Workbench represented approximately 18% of the Company's revenues
during 1995. The Company's most recent release of this product is version
3.01, which was first shipped in July 1996.
 
  The NodeBuilder development tool is designed to make it easy for OEMs to
develop and test individual LonWorks nodes. It uses a familiar Windows based
development environment with easy-to-use on-line help. The NodeBuilder tool
can complement the development capabilities of the LonBuilder Developer's
Workbench, since the NodeBuilder tool can be used to develop individual nodes
that are then integrated and tested as a system using the LonBuilder tool. The
Company's most recent release of the NodeBuilder development tool is version
1.5, which was first shipped in August 1996.
 
  Training and Support. The Company conducts a variety of technical training
courses covering its LonWorks network technology and products. These courses
are designed to provide hands-on, in-depth and practical experience that can
be used immediately by OEMs and systems integrators of LonWorks systems. The
Company also offers technical support to its customers on a per incident and
annual contract basis. These support services are intended to ensure proper
use of the Company's products and to shorten development time for the
customer's products that use Echelon's technology through timely resolution of
the customer's technical problems. As of May 31, 1998, the Company had 14
employees in the United States, Japan and the United Kingdom engaged in
training and support.
 
SALES AND MARKETING
 
  The Company markets and sells its products and services to OEMs and
increasingly to systems integrators to promote the widespread use of its
LonWorks technology. In addition, the Company believes that awareness of the
benefits of LonWorks networks among end-users will increase demand "pull" for
the Company's products. In North America, the Company sells its products
through a direct sales organization. Outside the United States, direct sales,
applications engineering and customer support are conducted through the
Company's operations in China, France, Germany, Hong Kong, Italy, Japan, the
Netherlands, South Korea and the United Kingdom. Each of these offices is
staffed primarily with local employees. The Company supplements its worldwide
sales personnel with application engineers and technical and industry experts
working in the Company's headquarters. The Company also leverages its selling
efforts through the use of an in-house telephone sales staff. Internationally,
the Company augments its direct sales with the use of distributors. These
distributors tend to specialize in certain geographical markets. The Company
sells its products in Europe principally through EBV, its sole independent
European distributor, and through its direct sales force. The Company relies
solely on distributors in certain countries in the Asia Pacific region,
including Australia and Taiwan, and in Latin America, through its distributor
in Argentina. See "Risk Factors--Dependence on OEMs and Distribution
Channels."
 
                                      35
<PAGE>
 
  The Company has recently implemented an authorized network integrator
program to increase the distribution of its products through systems
integrators worldwide. These systems integrators design, install and service
control systems using the Company's LonPoint System with legacy devices and
other manufacturers' products that meet the certification guidelines of the
LonMark Interoperability Association, thereby reducing dependence on single-
vendor products, eliminating the risks of centralized, closed controllers and
supporting less complex, peer-to-peer system architectures. The Company
provides these systems integrators with access to the training, tools and
products required to cost-effectively install, commission and maintain open,
multi-vendor distributed control systems based on LonWorks control networks.
 
  The Company's marketing efforts are augmented by the LonMark
Interoperability Association and the LonUsers International group. The LonMark
Interoperability Association was formed by Echelon in May 1994 and has over
200 members. This Association defines the technical standards for
interoperability for LonWorks technology and promotes the use of open control
networks based on the LonMark standard. The purpose of LonUsers International,
established by Echelon in 1991, is to provide a forum in which parties can
share recent information concerning LonWorks technology and applications,
build alliances and support the LonWorks standard for control networking. In
1997, LonUsers International meetings in North America, Europe and Asia drew
nearly 4,000 participants.
 
STRATEGIC ALLIANCES
 
  Neuron Chips, which are important components in control network nodes, are
manufactured and sold by both Motorola and Toshiba. The Company has entered
into licensing agreements with each of Motorola and Toshiba. Among other
things, the agreements grant Motorola and Toshiba the worldwide right to
manufacture and distribute Neuron Chips using technology licensed from the
Company and require the Company to provide support and unspecified updates to
the licensed technology over the terms of the agreements. The Motorola and
Toshiba agreements expire in December 1999 and January 2000 respectively,
unless renewed. However, both Motorola and Toshiba have the right to terminate
the agreements at any time. While the Company developed the first version of
the Neuron Chip, Motorola and Toshiba subsequently developed improved, lower-
cost versions of the Neuron Chip that are presently utilized in products
developed and sold by the Company and its customers. The Company currently has
no other source of supply for Neuron Chips and has neither the resources nor
the skills to replace either Motorola or Toshiba as a designer, manufacturer
or distributor of Neuron Chips. Motorola and Toshiba have played, and are
expected to continue to play, a key role in the development and marketing of
LonWorks technology. The loss of either Motorola or Toshiba as a supplier of
the Neuron Chip would have a material adverse effect on the business,
operating results and financial condition of the Company, and in such event
there can be no assurance that the Company would be able to locate an
alternate source for the design, manufacture or distribution of Neuron Chips.
See "Risk Factors--Dependence on Key Manufacturers" and "Certain
Transactions."
 
  The Company has an agreement with Toshiba and a non-binding memorandum of
understanding with Cisco to develop products that integrate LonWorks control
networks into enterprise data networks. Echelon's joint development agreement
with Toshiba is intended to enable products and technologies to be developed
using the Java programming language to program LonWorks control devices. The
Company expects that its relationship with Cisco will result in jointly-
developed products that simplify enterprise-wide integration of LonWorks
control and Internet protocol data networks.
 
PRODUCT DEVELOPMENT
 
  The Company's future success depends in large part on its ability to enhance
existing products, lower product cost and develop new products that maintain
technological competitiveness. The Company has made and intends to continue to
make substantial investments in product development. The Company recently has
made significant engineering investments in bringing its LNS network operating
system and LonPoint System products to market. Extensive product development
input is obtained from customers and by monitoring end-user needs and changes
in the marketplace. See "Risk Factors--New Products and Rapid Technological
Change."
 
                                      36
<PAGE>
 
  The Company's total expenses for product development for the three months
ended March 31, 1998 and for fiscal 1997 and 1996 were $2.0 million, $7.1
million and $7.5 million, respectively. The Company anticipates that it will
continue to commit substantial resources to product development in the future
and that product development expenses may increase in the future. To date, the
Company's development efforts have not resulted in any capitalized software
development costs. As of May 31, 1998, the Company's product development
organization consisted of 44 personnel.
 
COMPETITION
 
  Competition in the Company's markets is intense and involves rapidly
changing technologies, evolving industry standards, frequent new product
introductions and rapid changes in customer requirements. To maintain and
improve its competitive position, the Company must continue to develop and
introduce, on a timely and cost-effective basis, new products, features and
services that keep pace with the evolving needs of its customers. The
principal competitive factors affecting the markets for the Company's control
network products are customer service and support, product reputation,
quality, performance and price, and product features such as adaptability,
scalability, ability to integrate with other products, functionality and ease
of use. The Company believes it has in the past generally competed favorably
with offerings of its competitors on the basis of these factors. However,
there can be no assurance that the Company will continue to be able to compete
effectively based on these or any other competitive factors in the future.
 
  In each of its markets, the Company competes with a wide array of
manufacturers, vendors, strategic alliances, systems developers and other
businesses. The Company's competitors include some of the largest companies in
the electronics industry, such as Siemens in the building and industrial
automation industries and Allen-Bradley and Schneider in the industrial
automation industry. Many of the Company's competitors, alone or together with
their trade associations and partners, have longer operating histories,
significantly greater financial, technical, marketing, service and other
resources, significantly greater name recognition and broader product
offerings. As a result, such competitors may be able to devote greater
resources to the development, marketing and sale of their products, and may be
able to respond more quickly to changes in customer requirements or product
technology. In addition, those competitors that manufacture and promote
closed, centralized proprietary systems may enjoy a captive customer base
dependent on such competitors for service, maintenance, upgrades and
enhancements. Accordingly, there can be no assurance that the Company will be
able to compete successfully with existing or new competitors, or that
competition will not have a material adverse effect on the business, operating
results or financial condition of the Company.
 
  Many of the Company's current and prospective competitors are dedicated to
promoting closed or proprietary systems, technologies, software and network
protocols or product standards that differ from, or are incompatible with,
those of the Company. In some cases, companies have established associations
or cooperative relationships to enhance the competitiveness and popularity of
their products, or to promote such different or incompatible technologies,
protocols and standards. For example, in the building automation market, the
Company faces widespread reluctance by vendors of traditional closed or
proprietary control systems (who enjoy a captive market for servicing and
replacing equipment) to utilize the Company's interoperable technologies, as
well as strong competition by large trade associations that promote
alternative technologies and standards in their native countries, such as the
BatiBus Club International in France and the European Installation Bus
Association in Germany (each of which has over 100 members and licensees).
Other examples include the CEBus Industry Council, which is the proponent of
an alternative protocol to the Company's LonTalk protocol for use in the home
automation industry, and a group comprised of Asea Brown Boveri, ADtranz AB,
Siemens, GEC Alstrom and other manufacturers that support an alternative rail
transportation protocol to LonWorks networks. The Company works with
standards-setting organizations to establish open markets for LonWorks
products in the Company's targeted markets. There can be no assurance that the
Company's technologies, protocols or standards will be successful in any of
its markets, or that the Company will be able to compete with new or enhanced
products or standards introduced by existing or future competitors. Any
increase in competition or failure by the Company to effectively compete with
new or enhanced products or standards could result in fewer customer
 
                                      37
<PAGE>
 
orders, price reductions, reduced order size, reduced operating margins and
loss of market share, any of which could have a material adverse effect on the
business, operating results or financial condition of the Company. See "Risk
Factors--Competition."
 
  LonWorks technology is open, meaning that many of the Company's key
technology patents are broadly licensed without royalties or license fees. As
a result, the Company's customers are capable of developing products that
compete with some of the Company's products. Because some of the Company's
customers are OEMs that develop and market their own control systems, these
customers in particular could develop competing products based on the
Company's open technology. This could decrease the market for the Company's
products, increase competition, and have a material adverse effect on the
Company's business, operating results and financial condition. See "Business--
Products and Services."
 
MANUFACTURING
 
  The Company's manufacturing strategy is to outsource production to third
parties where it is more cost- effective and to limit its internal
manufacturing to such tasks as quality inspection, system integration, testing
and order fulfillment. Echelon maintains manufacturing agreements with
Motorola and Toshiba related to the Neuron Chip, an important component in
many of the Company's products. Additionally, for certain key products, the
Company utilizes outsourced manufacturers including GET, Hi-Tech, muRata and
Quadrus. These outsourced manufacturers procure material and assemble, test
and inspect the final products to the Company's specifications.
 
  The Company's future success will depend, in significant part, on its
ability to successfully manufacture its products cost-effectively and in
sufficient volumes. To date, the Company has not experienced any significant
delays or material unanticipated costs resulting from the use of third party
manufacturing; however, such a strategy involves certain risks, including the
potential absence of adequate capacity and reduced control over delivery
schedules, manufacturing yields, quality and costs. The loss of either
Motorola or Toshiba as a supplier of the Neuron Chip would have a material
adverse effect on the business, operating results and financial condition of
the Company, and in such event there can be no assurance that the Company
would be able to locate an alternate source for the design, manufacture or
distribution of Neuron Chips. Further, several key components are currently
purchased only from sole or limited sources. Any interruption in the supply of
these components, or the inability of the Company to procure these components
from alternate sources at acceptable prices and within a reasonable time,
could have a material adverse effect upon the Company's business, operating
results and financial condition. See "Risk Factors--Dependence on Key
Manufacturers."
 
GOVERNMENT REGULATION
 
  Many of the Company's products and the industries in which they are used are
subject to U.S. and foreign regulation. Government regulatory action could
greatly reduce the market for the Company's products. For example, the power
line medium (the communications medium used by some of the Company's products)
is subject to special regulations in North America, Europe and Japan. These
regulations limit the ability of companies in general to use power lines as a
communication medium. In addition, some of the Company's competitors have
attempted to use regulatory actions to reduce the market opportunity for the
Company's products or to increase the market opportunity for the competitors'
products. For example, CEMA, a trade association that developed the CEBus
protocol for use in home automation applications, has proposed that the FCC
adopt a standard for television-cable compatibility that encompasses CEBus.
CEMA has also proposed the use of such standard with respect to an FCC rule
making relating to the commercial availability of navigation devices, such as
set-top boxes. The Company has resisted these efforts and will continue to
oppose competitors' efforts to use regulation to impede competition in the
markets for the Company's products. There can be no assurance that existing or
future regulations or regulatory actions would not adversely affect the market
for the Company's products or require significant expenditures of management
or financial resources, any of which could have a material adverse effect on
the Company's business, operating results and a financial condition. See "Risk
Factors--Regulatory Actions."
 
                                      38
<PAGE>
 
PROPRIETARY RIGHTS
 
  The Company is the owner of numerous patents, trademarks and logos. As of
May 31, 1998, the Company had received 65 United States patents, and has 21
patent applications pending. Some of these patents have also been granted in
selected foreign countries. Many of the specific patents that are fundamental
to LonWorks technology have been licensed to the Company's customers with no
license fee or royalties. The principal value of the remaining patents relates
to the Company's specific implementation of its products. See "Risk Factors--
Competition" and "--Limited Protection of Intellectual Property Rights."
 
  The Company holds several registered trademarks in the United States,
including Echelon, LonBuilder, LonMark, LonTalk, LonUsers, LonWorks, Neuron
and NodeBuilder. The Company has also registered some of its trademarks and
logos in foreign countries.
 
EMPLOYEES
 
  As of May 31, 1998, the Company had 154 employees worldwide, of which 44
were in product development, 23 were in operations, 51 were in sales and
marketing, 14 were in customer support and training and 22 were in general and
administrative. Approximately 115 employees are located at the Company's
headquarters in Palo Alto, California. The Company has employees in 10
countries worldwide, with the largest concentrations outside the United States
in Japan, the Netherlands and the United Kingdom. None of the Company's
employees is represented by a labor union. The Company has not experienced any
work stoppages and considers its relations with its employees to be good.
 
FACILITIES
 
  The Company leases approximately 55,000 square feet of office, manufacturing
and distribution facilities in Palo Alto, California under two leases that
expire on June 30, 2000. The Company has an option to extend the lease of a
portion of the facilities for a five year period. The aggregate rental expense
under these leases will be approximately $1.4 million during 1998. The Company
also leases office space for its employees in China, France, Germany, Hong
Kong, Italy, Japan, the Netherlands and the United Kingdom. The aggregate
rental expense for such office space will be approximately $348,000 during
1998. The Company believes that additional office space will be available as
required on acceptable terms.
 
LEGAL PROCEEDINGS
 
  There are no material legal proceedings to which the Company is a party or
to which any of its properties are subject, nor are there any material legal
proceedings known to the Company to be contemplated by any governmental
authority against the Company or any of its properties.
 
                                      39
<PAGE>
 
                                  MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS
 
<TABLE>
<CAPTION>
 NAME                          AGE POSITION
 ----                          --- --------
 <C>                           <C> <S>
 M. Kenneth Oshman...........   58 Chairman of the Board, President & Chief
                                   Executive Officer, Director
 Gibson Anderson.............   56 Vice President, Human Resources
 Frederik Bruggink...........   43 Vice President, Europe, Middle East and
                                   Africa
 Lawrence Y.H. Chan..........   47 Vice President, Asia Pacific and Japan
 Robert A. Dolin.............   43 Vice President and Chief Technology Officer
 James M. Kasson.............   55 Vice President, Chief Information Officer
 Kenneth E. Lavezzo..........   56 Vice President of Operations
 Peter A. Mehring............   36 Vice President, Engineering
 Oliver R. Stanfield.........   49 Vice President, Finance & Chief Financial
                                   Officer
 Edwin R. Sterbenc...........   53 Vice President, Americas
 Beatrice Yormark............   53 Vice President of Marketing and Sales
 Armas Clifford Markkula,
  Jr.(1).....................   56 Vice Chairman of the Board, Director
 Bertrand F. Cambou..........   42 Director
 Robert R. Maxfield(2).......   56 Director
 Richard M. Moley(2).........   59 Director
 Arthur Rock(1)..............   71 Director
 Larry W. Sonsini............   57 Director
</TABLE>
- --------
(1) Member of the Audit Committee.
(2) Member of the Compensation Committee.
 
  The Board of Directors is divided into three classes, designated as Class A,
Class B and Class C. The term of the Class A directors expires at the
Company's annual meeting of stockholders in 1999 and each third annual meeting
thereafter. M. Kenneth Oshman and Larry W. Sonsini have been designated as
Class A directors. The term of the Class B directors expires at the Company's
annual meeting of stockholders in 2000 and each third annual meeting
thereafter. Bertrand Cambou, Clifford Markkula, Jr. and Robert R. Maxfield
have been designated as Class B directors. The term of the Class C directors
expires at the Company's annual meeting of stockholders in 2001 and each third
annual meeting thereafter. Richard M. Moley and Arthur Rock have been
designated as Class C directors. Officers are appointed by the Board of
Directors and serve at the discretion of the Board. There are no family
relationships among the officers and directors of the Company.
 
  M. Kenneth Oshman has been President and Chief Executive Officer of the
Company since December 1988. Mr. Oshman, with three associates, founded ROLM
Corporation ("ROLM"), a telecommunications equipment company, in 1969. He was
Chief Executive Officer, President, and a director at ROLM from its founding
until its merger with IBM in 1984. Following the merger, he became a Vice
President of IBM and a member of the Corporate Management Board. He remained
in that position until he left IBM in 1986. Prior to founding ROLM, Mr. Oshman
was a member of the technical staff at Sylvania Electric Products from 1963 to
1969. In addition to his responsibilities at Echelon, Mr. Oshman serves as a
director of Sun Microsystems, Knight-Ridder, Inc. and CMC Industries, Inc. Mr.
Oshman earned B.A. and B.S.E.E. degrees from Rice University and M.S. and
Ph.D. degrees in Electrical Engineering at Stanford University.
 
  Gibson Anderson has been Vice President, Human Resources of the Company
since February 1997 and was the Director of Human Resources of the Company
from 1990 to 1997. Mr. Anderson was employed by ROLM from 1971 to 1986, where
he held positions in engineering, marketing, manufacturing and human
resources. Before joining ROLM, he spent three years at Hewlett-Packard
developing data acquisition systems and three years at IBM performing analog
and digital circuit design and research in computerized speech recognition.
 
                                      40
<PAGE>
 
Mr. Anderson holds B.A. and B.S.E.E. degrees from Rice University and a M.S.
degree in Electrical Engineering from Stanford University.
 
  Frederik Bruggink has been Vice President, Europe, Middle East and Africa,
since April 1996. Mr. Bruggink joined the Company from Banyan Systems, where
he was Vice President, Europe. From 1985 to 1993, Mr. Bruggink held several
positions at Stratus Computer, including General Manager positions for
Holland, Benelux, and Northern Europe. His last position at Stratus was Vice
President, Northern Europe (including Germany). Prior to joining Stratus, he
held sales positions at Burroughs Computers. Mr. Bruggink attended the
University of Leiden.
 
  Lawrence Y.H. Chan joined the Company in April 1997 as Vice President of
Asia Pacific and Japan and is based in Hong Kong. Prior to joining the
Company, Mr. Chan was Vice President of Asia Pacific and Japan for Banyan
Systems. Prior to that, he held management positions at Stratus Computer, both
in the U.S. and Hong Kong. Prior to joining Stratus, he held positions with
ComputerVision, Oriental Data Systems, Ltd., Hong Kong Terminals, John Swire
and Sons, Ltd., Kowloon Container Terminals Ltd. and NCR Hong Kong Ltd. Mr.
Chan received a General Certificate of Education from the University of
London, a degree in Electrical Engineering from Hong Kong Technical College
and a degree in Computer Programming from Hong Kong University.
 
  Robert A. Dolin has been Vice President and Chief Technology Officer of the
Company since May 1995. From 1989 until 1995, Mr. Dolin was the Director of
Systems Engineering of the Company. Before joining the Company, Mr. Dolin was
Manager of Architecture at ROLM where he worked for 12 years. He has a B.S.
degree in Electrical Engineering and Computer Science from the University of
California at Berkeley.
 
  James M. Kasson has been Vice President, Chief Information Officer of the
Company since November 1997. He served as Vice President of Engineering of the
Company from May 1995 to November 1997. From 1988 until May 1995, he was an
IBM Fellow, first as Director of IBM's Advanced Telecommunications Research
Laboratory and later at the Almaden Research Center in San Jose where he
worked in research on a wide variety of electronic imaging systems. Mr. Kasson
joined ROLM in 1973, which was purchased by IBM in 1984. Mr. Kasson received a
B.S. degree in Electrical Engineering from Stanford University and an M.S.
degree in Electrical Engineering from the University of Illinois.
 
  Kenneth E. Lavezzo has been Vice President of Operations of the Company
since September 1990 and has been employed by the Company since 1989. Mr.
Lavezzo joined the Company from ROLM, where he was the Director responsible
for Phonemail and Voice Applications. He also served as General Manager of the
Phones Division. Mr. Lavezzo joined ROLM in 1973 and held a variety of other
positions ranging from product design and program management to production and
manufacturing management. Prior to joining ROLM, he spent seven years at
Hewlett-Packard as a member of the technical staff developing medical products
and high-speed data acquisition products. Mr. Lavezzo received a B.S. degree
in Electrical Engineering from the University of California at Berkeley.
 
  Peter A. Mehring has been Vice President, Engineering of the Company since
March 1998. From January 1996 to March 1998, Mr. Mehring held a variety of
positions at Umax Computer Corporation ("Umax") where he was a Founder,
General Manager, and Vice President of research and development. From March
1995 to December 1995, Mr. Mehring held engineering management positions at
Radius, Inc., Power Computing Corporation, Sun Microsystems, Inc., and Wang
Laboratories, Inc. Mr. Mehring received a B.S. degree in Electrical
Engineering from Tufts University, Massachusetts.
 
  Oliver R. Stanfield has been Vice President of Finance & Chief Financial
Officer of the Company since March 1989. Mr. Stanfield joined the Company from
ROLM, where he served in several positions since 1980, including Director of
Pricing; Vice President, Plans and Controls; Vice President, Business
Planning; Vice President, Financial Planning and Analysis; Treasurer; and
Controller, Mil Spec Division. Prior to joining ROLM, Mr. Stanfield worked for
ITEL Corporation, Computer Automation and Rockwell International.
Mr. Stanfield began his business career with Ford Motor Company in 1969 in
various accounting positions while completing a B.S. in Business
Administration and an M.B.A. degree from the University of Southern
California.
 
                                      41
<PAGE>
 
  Edwin R. Sterbenc joined the Company in April 1997 as Vice President,
Americas. Prior to joining the Company, Mr. Sterbenc was with Tandem
Computers, Inc. from 1987 to 1997. At Tandem, he held positions in sales,
international sales and marketing. Prior to joining Tandem Computers, Inc.,
Mr. Sterbenc was Vice President of Sales at Syntelligence. He was a Sales
Manager for Cullinet Software from 1984 to 1986, and held positions in sales,
marketing and sales management at IBM from 1973 to 1984. Mr. Sterbenc worked
at Inland Steel prior to joining IBM. Mr. Sterbenc holds a B.S. degree in
Industrial Management and an A.A.S. degree in Computer Science from Purdue
University.
 
  Beatrice Yormark has been Vice President of Marketing and Sales of the
Company since January 1990. Ms. Yormark joined the Company from Connect, Inc.,
an on-line information services company, where she was the company's Chief
Operating Officer. Before joining Connect, Ms. Yormark held a variety of
positions, including Executive Director of Systems Engineering for Telaction
Corporation, Director in the role of Partner at Coopers & Lybrand, Vice
President of Sales at INTERACTIVE Systems Corporation, and various staff
positions at the Rand Corporation. Ms. Yormark received a B.S. degree in
Mathematics from City College of New York and an M.S. degree in Computer
Science from Purdue University.
 
  Armas Clifford Markkula, Jr. is the founder of the Company and has served as
a director since 1988. He has been Vice Chairman of the Company's Board since
1989. Mr. Markkula was Chairman of the Board of Directors of Apple Computer,
Inc. from October 1993 to February 1996 and was a director from 1977 to 1997.
A founder of Apple, he held a variety of positions there, including
President/Chief Executive Officer and Vice President of Marketing. Prior to
founding Apple, Mr. Markkula was with Intel Corporation as Marketing Manager,
Fairchild Camera and Instrument Corporation as Marketing Manager in the
Semiconductor Division, and Hughes Aircraft as a member of the technical staff
in the company's research and development laboratory. Mr. Markkula received
B.S. and M.S. degrees in Electrical Engineering from the University of
Southern California.
 
  Bertrand F. Cambou has been a director of the Company since 1998. He has
been Senior Vice President and General Manager of the Networking and Computing
System Group of Motorola since 1997. Between 1984 and 1997 he held various
management positions within Motorola in Operations and Research and
Development. From 1980 to 1984, he participated in the founding of Matra
Harris Semiconductor. Dr. Cambou received a B.S. degree in Electrical
Engineering from Supelec University, France, a Masters degree in Physics from
Toulouse University and a Doctorate degree in Electronics from Paris
University.
 
  Robert R. Maxfield has been a director of the Company since 1989. He was a
co-founder of ROLM in 1969, and served as Executive Vice President and a
director until ROLM's merger with IBM in 1984. Following the merger, he
continued to serve as Vice President of ROLM until 1988. Since 1988, he has
been a consulting professor in the Electrical Engineering and Engineering-
Economic Systems Departments at Stanford University, and was a venture partner
with Kleiner, Perkins, Caufield & Byers from 1989 to 1992. He serves as a
director of Cedro Group Inc. Dr. Maxfield received B.A. and B.S.E.E. degrees
from Rice University, and M.S. and Ph.D. degrees in Electrical Engineering
from Stanford University.
 
  Richard M. Moley has been a director of the Company since February 1997. Mr.
Moley was Senior Vice President, Wide Area Business Unit, of Cisco Systems,
Inc. from July 1996 to July 1997. He served as President and Chief Executive
Officer of StrataCom, Inc. from June 1986 to July 1996, when StrataCom was
acquired by Cisco. Mr. Moley serves on the Board of Directors of Linear
Technology, Inc. and Cidco, Inc. Mr. Moley received a B.S. degree in
Electrical Engineering from Manchester University, an M.S. degree in
Electrical Engineering from Stanford University and an M.B.A. from the
University of Santa Clara.
 
  Arthur Rock has been a director of the Company since December 1988. Mr. Rock
has been Principal of Arthur Rock & Co., a venture capital firm, since 1969.
He has been a director of Intel since its founding in 1968, and is presently
Chairman of the Executive Committee and Lead Director of the Board of
Directors of Intel. He is also a director of Argonaut Group, Inc. and AirTouch
Communications, Inc., and a trustee of California Institute of Technology. Mr.
Rock received a B.S. degree in Political Science and Finance from Syracuse
University and an M.B.A. from Harvard University.
 
 
                                      42
<PAGE>
 
  Larry W. Sonsini has been a director of the Company since August 1993. Mr.
Sonsini serves as Chairman of the Executive Committee of the law firm of
Wilson Sonsini Goodrich & Rosati, where he has practiced since 1966. Mr.
Sonsini serves as a director of Novell, Inc., Lattice Semiconductor
Corporation and PIXAR Inc. Mr. Sonsini received an A.B. degree in Political
Science and Economics and an L.L.B. degree from the University of California
at Berkeley.
 
BOARD COMMITTEES
 
  The Board of Directors of the Company has an Audit Committee and a
Compensation Committee. The Audit Committee, which is comprised of Messrs.
Markkula and Rock, approves the Company's independent auditors, reviews the
results and scope of annual audits and other accounting related services and
evaluates the Company's internal control functions. The Compensation
Committee, comprised of Messrs. Maxfield and Moley, reviews and makes
recommendations to the Board of Directors regarding the compensation policy
for executive officers, directors and consultants of the Company. The
Compensation Committee also administers the Company's stock plans. The Audit
and Compensation Committees were established in May 1996.
 
DIRECTOR COMPENSATION
 
  The Company does not pay any compensation to directors for serving in that
capacity. Non-employee directors are automatically eligible to participate in
the 1998 Director Option Plan. See "Management--Stock Option Plans and
Warrants."
 
LIMITATION OF LIABILITY AND INDEMNIFICATION MATTERS
 
  The Company's Certificate of Incorporation limits the liability of directors
to the maximum extent permitted by Delaware law. Delaware law provides that
directors of a company will not be personally liable for monetary damages for
breach of their fiduciary duties as directors, except for liability (i) for
any breach of their duty of loyalty to the company or its stockholders, (ii)
for acts or omissions not in good faith or which involve intentional
misconduct or a knowing violation of law, (iii) for unlawful payments of
dividends or unlawful stock repurchases or redemptions as provided in Section
174 of the Delaware General Corporation Law, or (iv) for any transaction from
which the director derived an improper personal benefit.
 
  The Company's Bylaws provide that the Company shall indemnify its officers
and directors and may indemnify its employees and other agents to the fullest
extent permitted by law. The Company believes that indemnification under its
Bylaws covers at least negligence and gross negligence on the part of
indemnified parties. The Company's Bylaws also permit it to secure insurance
on behalf of any officer, director, employee or other agent for any liability
arising out of his or her actions in such capacity, regardless of whether the
Bylaws would permit indemnification.
 
  The Company has entered into agreements to indemnify its directors and
officers, in addition to the indemnification provided for in the Company's
Bylaws. These agreements, among other things, indemnify the Company's
directors and officers for certain expenses (including attorneys' fees),
judgments, fines and settlement amounts incurred by any such person in any
action or proceeding, including any action by or in the right of the Company,
arising out of such person's services as a director or officer of the Company,
any subsidiary of the Company or any other company or enterprise to which the
person provides services at the request of the Company. The Company believes
that these provisions and agreements are necessary to attract and retain
qualified persons as directors and officers.
 
  At present, there is no pending litigation or proceeding involving any
director, officer, employee or agent of the Company, where indemnification
will be required or permitted. The Company is not aware of any threatened
litigation or proceeding which may result in a claim for such indemnification.
 
 
                                      43
<PAGE>
 
EXECUTIVE COMPENSATION
 
  The following table sets forth certain summary information regarding
compensation earned in the fiscal year ended December 31, 1997 by the
Company's Chief Executive Officer and each of the Company's four other most
highly paid executive officers (collectively, the "Named Executive Officers").
 
<TABLE>
<CAPTION>
                                                         LONG-TERM
                              ANNUAL COMPENSATION      COMPENSATION
                          ---------------------------- -------------
                                                        SECURITIES
NAME AND PRINCIPAL                        OTHER ANNUAL  UNDERLYING      ALL OTHER
POSITION                   SALARY  BONUS  COMPENSATION OPTIONS(#)(1) COMPENSATION(2)
- ------------------        -------- ------ ------------ ------------- ---------------
<S>                       <C>      <C>    <C>          <C>           <C>
M. Kenneth Oshman
 Chairman of the Board,
 President and CEO......  $270,000 $   --    $   --         --           $1,636
Oliver R. Stanfield
 Vice President of Fi-
 nance and CFO..........   260,000     --        --       150,000         1,438
Beatrice Yormark
 Vice President of Mar-
 keting and Sales.......   260,000     --        --       150,000         1,584
James M. Kasson
 Vice President, Chief
 Information Officer....   230,000     --        --       100,000         1,122
Kenneth E. Lavezzo
 Vice President of Oper-
 ations.................   220,000     --        --        75,000           998
</TABLE>
- --------
(1) The options were granted under the Company's 1997 Stock Plan. See "--Stock
    Option Plans and Warrants" for a description of the 1997 Stock Plan.
(2) Consists of premiums paid by the Company for life insurance coverage.
 
OPTION GRANTS DURING THE FISCAL YEAR ENDED DECEMBER 31, 1997
 
  The following table sets forth certain information regarding the stock
options granted during the fiscal year ended December 31, 1997 to each of the
Named Executive Officers. No stock appreciation rights were granted to those
individuals during the fiscal year ended December 31, 1997.
 
<TABLE>
<CAPTION>
                                      INDIVIDUAL GRANTS(1)
                         -----------------------------------------------
                                                                         POTENTIAL REALIZABLE
                                                                           VALUE AT ASSUMED
                                                                           ANNUAL RATES OF
                         NUMBER OF                                           STOCK PRICE
                         SECURITIES  % OF TOTAL                            APPRECIATION FOR
                         UNDERLYING   OPTIONS      EXERCISE                OPTION TERM (4)
                          OPTIONS    GRANTED TO     PRICE     EXPIRATION --------------------
NAMED EXECUTIVE OFFICER   GRANTED   EMPLOYEES(2) PER SHARE(3)    DATE       5%        10%
- -----------------------  ---------- ------------ ------------ ---------- --------- ----------
<S>                      <C>        <C>          <C>          <C>        <C>       <C>
M. Kenneth Oshman.......     --          --           --          --        --         --
Oliver R. Stanfield.....  150,000       6.9%        $1.40      6/10/02     $58,019   $128,207
Beatrice Yormark........  150,000       6.9          1.40      6/10/02      58,019    128,207
James M. Kasson.........  100,000       4.6          1.40      6/10/02      38,679     85,471
Kenneth E. Lavezzo......   75,000       3.4          1.40      6/10/02      29,010     64,104
</TABLE>
- --------
(1) All options granted during the fiscal year were granted under the 1997
    Stock Plan. Each option is immediately exercisable and vests according to
    a vesting schedule, subject to the employee's continued employment with
    the Company. See "--Stock Option Plans and Warrants."
(2) Based on a total of 2,185,700 options granted to all employees during the
    fiscal year ended December 31, 1997.
(3) The exercise price per share of options granted represented the fair
    market value as determined by the Board of Directors on June 10, 1997, the
    date the options were granted.
 
                                      44
<PAGE>
 
(4) Potential gains are net of the exercise price but before taxes associated
    with the exercise. The 5% and 10% assumed annual rates of compounded stock
    appreciation based upon the deemed fair market value as mandated by the
    rules of the Securities and Exchange Commission and do not represent the
    Company's estimate or projection of the future common stock price. Actual
    gains, if any, on stock option exercises are dependent on the future
    financial performance of the Company, overall market conditions and the
    option holders' continued employment through the vesting period. This
    table does not take into account any appreciation in the deemed fair
    market value of the Common Stock from the date of grant to the date of
    this Prospectus, other than the columns reflecting assumed rates of
    appreciation of 5% and 10%.
 
AGGREGATE OPTION EXERCISES IN 1997 AND 1997 FISCAL YEAR-END OPTION VALUES
 
  There were no option exercises by the Named Executive Officers in the fiscal
year ended December 31, 1997. The following table sets forth for each Named
Executive Officer the number of shares covered by exercisable stock options as
of December 31, 1997. Also reported are values for "in-the-money" options that
represent the positive spread between the respective exercise prices of
outstanding options and the fair market value of the Company's Common Stock as
of December 31, 1997, as determined by the Board of Directors of the Company.
No stock appreciation rights to those individuals were outstanding during the
fiscal year ended December 31, 1997.
 
<TABLE>
<CAPTION>
                               NUMBER OF SECURITIES
                              UNDERLYING UNEXERCISED     VALUE OF UNEXERCISED
                              OPTIONS AT FISCAL YEAR-   IN-THE-MONEY OPTIONS AT
                                        END              FISCAL YEAR-END(1)(2)
                             ------------------------- -------------------------
                                                       EXERCISABLE UNEXERCISABLE
NAME                         EXERCISABLE UNEXERCISABLE     ($)          ($)
- ----                         ----------- ------------- ----------- -------------
<S>                          <C>         <C>           <C>         <C>
M. Kenneth Oshman...........     --            --       $     --    $       --
Oliver R. Stanfield......... 300,000(3)        --             --            --
Beatrice Yormark............ 300,000(3)        --             --            --
James M. Kasson............. 175,000(4)        --             --            --
Kenneth E. Lavezzo..........  75,000(5)        --             --            --
</TABLE>
- --------
(1) Options granted under the 1988 Stock Option Plan and 1997 Stock Plan may
    be exercised immediately upon grant and prior to full vesting, subject to
    the optionee's entering into a restricted stock purchase agreement with
    the Company with respect to any unvested shares.
(2) Calculated by determining the difference between fair market value of the
    securities underlying the option at December 31, 1997 ($1.40 per share, as
    determined by the Board of Directors) and the exercise price ($1.40 per
    share) of the options.
(3) Includes 37,500 vested shares and 262,500 unvested shares as of December
    31, 1997.
(4) Includes 18,750 vested shares and 156,250 unvested shares as of December
    31, 1997.
(5) Includes no vested shares and 75,000 unvested shares as of December 31,
    1997.
 
STOCK OPTION PLANS AND WARRANTS
 
  1988 Stock Option Plan. A total of 8,900,000 shares of Common Stock were
reserved for issuance under the Company's 1988 Stock Option Plan (the "1988
Plan"), the reservation of which shares was approved by the Company's
stockholders. The 1988 Plan was terminated as to new option grants, effective
as of April 23, 1997. Outstanding options granted and unvested stock issued
under the 1988 Plan remain subject to the terms and conditions of the
agreements evidencing those grants or issuances. The Board currently
administers the 1988 Plan with respect to the outstanding options and stock
issuances and has full authority to interpret and construe the provisions of
those options and issuances. As of March 31, 1998, 4,996,813 shares of Common
Stock had been issued upon the exercise of stock options granted under the
1988 Plan, 2,072,770 shares were outstanding (the "Outstanding 1988 Plan
Options"), no shares had been issued upon the exercise of stock purchase
rights, and as a result of the termination of the 1988 Plan, all shares that
had been available for future grant were returned to the status of authorized
and unissued shares. Of the Outstanding 1988 Plan Options, the per share
 
                                      45
<PAGE>
 
exercise prices range from $0.15 to $1.40 and the expiration dates range from
May 19, 1998 to November 12, 2001.
 
  The 1988 Plan provides that options and stock purchase rights may be granted
to employees (including officers and employee directors) and consultants
(including non-employee directors) of the Company and its majority-owned
subsidiaries. Options intended to qualify as incentive stock options ("ISOs")
within the meaning of Section 422 of the Internal Revenue Code of 1986, as
amended, may only be granted to employees, while options not intended to
qualify as ISOs, also known as nonstatutory stock options ("NSOs"), may be
granted to both employees and consultants.
 
  The exercise price of any ISOs granted under the 1988 Plan were at least
equal to the fair market value of the shares of Common Stock on the date of
grant; provided, however, that the exercise price of ISOs granted to an
employee holding stock representing more than 10% of the voting power of the
Company (a "10% Stockholder") had to be 110% of the fair market value of the
shares of Common Stock on the date of grant. The exercise price of NSOs and
stock purchase rights granted under the 1988 Plan had to be at least equal to
85% of the fair market value of the shares of Common Stock on the date of
grant; provided, however, that the exercise price of NSOs to a 10% Stockholder
had to be 110% of the fair market value of the shares of Common Stock on the
date of grant. The Board has the authority to reprice options outstanding
under the 1988 Plan at a lower exercise price than the original exercise price
in the event the fair market value of the Common Stock declines after the date
the option was granted. The maximum term of each option must not exceed 10
years; however, the term of an ISO granted to a 10% Stockholder must not
exceed five years. Options granted under the 1988 Plan generally have a term
of five years.
 
  Options granted under the 1988 Plan are subject to vesting, which generally
occurs at the rate of one-fourth of the shares each year following the date of
hire or grant. Generally, shares which have not yet vested may be exercised
pursuant to a restricted stock purchase agreement subject to a repurchase
option in favor of the Company which lapses at the same rate as the vesting
schedule set forth in the option agreement. In the event of termination of an
optionee's employment or consulting relationship, ISOs may be exercised, to
the extent vested, within 30 days following such termination, and any
outstanding NSOs may be exercised, to the extent vested, during such period of
time, as determined by the Board not to exceed six months following
termination; provided, however, that in the event of termination due to
disability or death, both ISOs and NSOs may be exercised, to the extent
vested, within 12 months following termination due to disability or death.
Options granted under the 1988 Plan may not be transferred other than by will
or by the laws of descent or distribution. In the event of the dissolution or
liquidation of the Company, unexercised options shall terminate immediately
prior to the consummation of such proposed action. In the event of a merger of
the Company with or into another corporation, the 1988 Plan provides that each
outstanding option shall be assumed or an equivalent option shall be
substituted by the successor corporation; provided, however, that if such
successor corporation refuses to assume or substitute the then outstanding
options, (i) any options granted prior to October 19, 1993 shall become fully
exercisable, and (ii) any options granted on or after October 19, 1993 will
terminate as of the closing of the merger.
 
  1997 Stock Plan. The Company's 1997 Stock Plan, as amended and restated (the
"1997 Plan"), provides for the granting to employees of incentive stock
options within the meaning of Section 422 of the Internal Revenue Code of
1986, as amended (the "Code"), and for the granting to employees and
consultants of nonstatutory stock options and stock purchase rights ("SPRs").
The 1997 Plan was approved by the Board of Directors in February 1997 and by
the stockholders in April 1997. Unless terminated sooner, the 1997 Plan will
terminate automatically in 2007. A total of 6,200,000 shares of Common Stock
are currently reserved for issuance pursuant to the 1997 Plan, plus annual
increases on the first day of the Company's fiscal year (beginning in 1999)
not to exceed the lesser of (i) 5,000,000 shares or (ii) 5% of the outstanding
shares on such date. As of March 31, 1998, 247,375 shares of Common Stock had
been issued upon the exercise of stock options granted under the 1997 Plan,
and 2,009,925 options were outstanding.
 
  The 1997 Plan may be administered by the Board of Directors or a committee
of the Board (as applicable, the "Administrator"), which committee shall, in
the case of options intended to qualify as "performance-based
 
                                      46
<PAGE>
 
compensation" within the meaning of Section 162(m) of the Code, consist of two
or more "outside directors" within the meaning of Section 162(m) of the Code.
The Administrator has the power to determine the terms of the options or SPRs
granted, including the exercise price, the number of shares subject to each
option or SPR, the exercisability thereof, and the form of consideration
payable upon such exercise. In addition, the Administrator has the discretion
to reprice outstanding options or to cancel and regrant options with the
exercise price lower than the original exercise price. The Administrator has
the authority to amend, suspend or terminate the 1997 Plan, provided that no
such action may affect any share of Common Stock previously issued and sold or
any option previously granted under the 1997 Plan.
 
  Options and SPRs granted under the 1997 Plan are not generally transferable
by the optionee, and each option and SPR is exercisable during the lifetime of
the optionee only by such optionee. Options granted under the 1997 Plan must
generally be exercised within three months of the end of optionee's status as
an employee or consultant of the Company, or within 12 months after such
optionee's termination by death or disability, but in no event later than the
expiration of the option's term. In the case of SPRs, unless the Administrator
determines otherwise, the Restricted Stock Purchase Agreement shall grant the
Company a repurchase option exercisable upon the voluntary or involuntary
termination of the purchaser's employment with the Company for any reason
(including death or disability). The purchase price for shares repurchased
pursuant to the Restricted Stock Purchase Agreement shall be the original
price paid by the purchaser and may be paid by cancellation of any
indebtedness of the purchaser to the Company. The repurchase option shall
lapse at a rate determined by the Administrator. The exercise price of all
incentive stock options granted under the 1997 Plan must be at least equal to
the fair market value of the Common Stock on the date of grant. The exercise
price of nonstatutory stock options and SPRs granted under the 1997 Plan is
determined by the Administrator, but will also be at least equal to 100% of
the fair market value per share of Common Stock on the grant or issue date,
except that up to 10% of the aggregate number of shares reserved for issuance
under the 1997 Plan (including shares that have been issued or are issuable in
connection with options exercised or granted under the 1997 Plan) may have
exercise prices that are from 0% to 100% of the fair market value of the
Common Stock on the date of grant. With respect to any participant who owns
stock possessing more than 10% of the voting power of all classes of the
Company's outstanding capital stock, the exercise price of any incentive stock
option granted must equal at least 110% of the fair market value on the grant
date and the term of such incentive stock option must not exceed five years.
The term of all other options granted under the 1997 Plan may not exceed 10
years.
 
  The 1997 Plan provides that in the event of a merger of the Company with or
into another corporation, a sale of substantially all of the Company's assets
or a like transaction involving the Company, each option or right shall be
assumed or an equivalent option or right substituted by the successor
corporation. If the outstanding options or rights are not assumed or
substituted as described in the preceding sentence, the Administrator shall
provide for the Optionee to have the right to exercise the option or SPR as to
all of the optioned stock, including shares as to which it would not otherwise
be exercisable for a period of 15 days from the date of such notice, and the
option or SPR will terminate upon the expiration of such period. In the event
of involuntary termination of employment (or termination of status as a
director of a successor corporation) within 12 months following a change of
control merger pursuant to which options and SPRs are assumed or substituted
by a successor corporation, the optionee shall have the right to exercise the
option or SPR as to all of the optioned stock, including shares as to which it
would not otherwise be exercisable.
 
  1998 Director Option Plan. Non-employee directors are entitled to
participate in the 1998 Director Option Plan (the "Director Plan"). The
Director Plan was adopted by the Board of Directors in May 1998, and is
subject to stockholder approval, but it will in no event become effective
until the date of this offering. The Director Plan has a term of 10 years,
unless terminated sooner by the Board. A total of 300,000 shares of Common
Stock have been reserved for issuance under the Director Plan. The share
reserve under the Director Plan will increase each year on the first day of
the Company's fiscal year, beginning in 1999, by an amount equal to 100,000
shares or a lesser amount determined by the Board.
 
  The Director Plan provides for the automatic grant of an option to purchase
25,000 shares of Common Stock (the "First Option") to each non-employee
director who first becomes a non-employee director after May 29,
 
                                      47
<PAGE>
 
1998, whether by appointment by the Board or election by the stockholders,
provided such non-employee director has not previously been in the employ of
the Company. Each non-employee director shall also automatically be granted an
option to purchase 10,000 shares (a "Subsequent Option") on both the effective
date of this offering and on the date of the Company's Annual Stockholder
Meeting provided that he or she is re-elected to the Board or otherwise
remains on the Board, if on such date he or she shall have served on the Board
for at least the preceding six months. Each First Option and each Subsequent
Option shall have a term of five years and the shares subject to the option
will become exercisable in four equal annual installments subject to the
optionee's completion of each year of Board service over the four year period
measured from the grant date. The exercise price of any option granted under
the Director Plan will be equal to the fair market value per share of Common
Stock on the grant date. The fair market value per share will be equal to the
closing sales price per share of Common Stock on the Nasdaq National Market on
the last market trading day prior to the grant date. However, for automatic
options granted on the effective date of this offering, the fair market value
will be equal to the initial price per share offered to the public in this
offering. On the effective date of this offering options to purchase an
aggregate of 60,000 shares will be granted under the Director Plan.
 
  Options granted under the Director Plan must be exercised within three
months of the end of the optionee's tenure as a director of the Company, or
within 12 months after such director's termination by death or disability, but
in no event later than the expiration of the option's five year term. Options
outstanding at the end of an optionee's tenure as a director may only be
exercised to the extent exercisable at the time of such cessation of service
as a director. However, if the optionee has served as a director for at least
five years at the time of such cessation of service as a director, then the
option will accelerate and become immediately exercisable for all of the
option shares at the time subject to the option as fully-vested shares and
will remain exercisable for those shares until the end of the five year term.
No option granted under the Director Plan is transferable by the optionee
other than by will or the laws of descent and distribution, and each option is
exercisable, during the lifetime of the optionee, only by such optionee. In
the event of a merger of the Company or the sale of substantially all of the
assets of the Company, each outstanding option will become fully-vested and
exercisable for all of the option shares, unless such outstanding options are
assumed or substituted by the successor corporation. In the event outstanding
options are either assumed or substituted by the successor corporation, each
outstanding option will continue to become exercisable in accordance with its
original exercise schedule. If an outstanding option is assumed or substituted
and the optionee's status as a director or as a director of the successor
corporation terminates other than upon a voluntary resignation by the
optionee, then the option will become immediately exercisable for all of the
option shares at the time of such termination as fully-vested shares.
 
  Warrants. Warrants to purchase an aggregate of 30,000 shares of Common Stock
at a per share exercise price of $12.00 are outstanding and unexercised (the
"Common Stock Warrants"). The Common Stock Warrants are exercisable at any
time until their expiration on the earlier of February 2, 1999 or the
consummation of a merger of the Company with another entity or the sale of
substantially all of the Company's assets, whereby the holders of the
Company's voting securities prior to such transaction do not hold more than
50% of the voting securities of the surviving entity following such
transaction (a "Change in Control").
 
  In addition, warrants to purchase an aggregate of 400,000 shares of Series E
Preferred Stock (or Common Stock, if all Series E Preferred Stock has then
been converted into Common Stock) at a per share exercise price of $5.00 are
outstanding and unexercised (the "Series E Warrants"; and together with the
Common Stock Warrants, the "Warrants"). The Series E Warrants are exercisable
at any time until their expiration on the earlier of May 15, 2002 or a Change
in Control. Each Warrant contains a cashless conversion right that allows the
holder to receive a number of shares of the Company's Common Stock or Series E
Preferred Stock, as applicable, equal to the quotient obtained by dividing (x)
the value of the Warrant on the date of exercise, which value is determined by
subtracting (a) the aggregate exercise price of the Warrant from (b) the
aggregate fair market value of the Warrant shares on the date of exercise, by
(y) the fair market value of one share of the Company's Common Stock or Series
E Preferred Stock, as applicable, on the date of exercise, as determined by
the Company's Board of Directors. The issuance of the Warrants did not require
stockholder approval. Upon the closing of this offering, the Series E
Preferred Stock will be converted into Common Stock and the Series E Warrants
will be exercisable for Common Stock.
 
                                      48
<PAGE>
 
                             CERTAIN TRANSACTIONS
 
  In June and July 1995, the Company sold shares of Common Stock to the
following officers of the Company at a per share purchase price of $1.10, the
then fair market value of the Company's Common Stock as determined by the
Company's Board of Directors: James M. Kasson--150,000 shares; Kenneth E.
Lavezzo--75,000 shares; M. Kenneth Oshman--250,000 shares, Oliver R.
Stanfield--175,000 shares; Beatrice Yormark--200,000 shares. These shares are
subject to a repurchase option by the Company, which repurchase option lapses
at the rate of one-fourth of the shares on May 23, 1996 and each one year
anniversary thereafter, subject to the continued employment with the Company
of each such officer.
 
  In December 1995, the Company sold 100,000 shares of Common Stock to James
M. Kasson at a per share purchase price of $1.29, the then fair market value
of the Company's Common Stock as determined by the Company's Board of
Directors. These shares are subject to a repurchase option by the Company,
which repurchase option lapses at the rate of one-fourth of the shares on
November 17, 1996 and each one year anniversary thereafter, subject to Mr.
Kasson's continued employment with the Company.
 
  In November 1996, the Company sold 1,000,000 shares of Common Stock to M.
Kenneth Oshman at a per share purchase price of $1.40, the then fair market
value of the Company's Common Stock as determined by the Company's Board of
Directors. These shares are subject to a repurchase option by the Company,
which repurchase option lapses at the rate of one-fourth of the shares on
September 17, 1997 and each one year anniversary thereafter, subject to Mr.
Oshman's continued employment with the Company.
 
  In May 1997, the Company sold an aggregate of 2,000,000 shares of Series E
Preferred Stock, at a per share purchase price of $5.00, and issued warrants
to purchase an aggregate of 400,000 shares of Series E Preferred Stock at a
per share exercise price of $5.00 each in a private placement financing with
existing stockholders of the Company, including (i) an aggregate of 1,022,428
shares purchased by M. Kenneth Oshman and Barbara S. Oshman, Trustees of the
Oshman Trust dated July 10, 1979 (the "Oshman Trust"), and O-S Ventures, of
which Dr. Oshman is general partner ("O-S Ventures"), and a warrant to
purchase 249,713 shares issued to the Oshman Trust, (ii) an aggregate of
186,011 shares purchased by Armas Clifford Markkula, Jr. and Linda Kathryn
Markkula, Trustees of the Restated Arlin Trust Dated December 12, 1990 (the
"Arlin Trust"), and Markkula Family Limited Partnership (the "Markkula
Partnership"), and a warrant to purchase 40,183 shares issued to the Arlin
Trust, (iii) 121,029 shares purchased by Arthur Rock and a warrant to purchase
29,187 shares issued to Mr. Rock, (iv) 66,230 shares purchased by a trust for
the benefit of Robert R. Maxfield (the "Maxfield Trust") and a warrant to
purchase 15,736 shares issued to the Maxfield Trust, and (v) 37,803 shares
purchased by Richard M. Moley and a warrant to purchase 10,000 shares issued
to Mr. Moley.
 
  In March 1998, Peter Mehring was granted an option to purchase 200,000
shares of Common Stock pursuant to the Company's 1997 Stock Plan at a per
share exercise price of $2.00. The option vests at the rate of one-fourth of
the shares on March 9, 1999 and each one-year anniversary thereafter, subject
to Mr. Mehring's continued employment with the Company. Mr. Mehring's stock
option agreement provides that at any time in 1998, following the date of
grant of the option, Mr. Mehring may exercise the option for 50,000 shares
which vest on March 9, 1999; at any time in 1999 Mr. Mehring may exercise the
option for 50,000 shares which vest on March 9, 2000; at any time in 2000 Mr.
Mehring may exercise the option for 50,000 shares which vest on March 9, 2001;
and at any time in 2001 Mr. Mehring may exercise the option for 50,000 shares
which vest on March 9, 2002. In April 1998, Mr. Mehring exercised 50,000
unvested option shares and executed a promissory note in the principal amount
of $100,000 payable to the Company. The note is a full recourse note and is
secured by the shares, bears interest at the annual rate of 5.7% and is due in
April 2003.
 
  The Company has entered into licensing agreements with Motorola, which is a
principal stockholder of the Company and Motorola has had a representative on
the Company's Board of Directors from time to time since 1991. Pursuant to
this agreement, Motorola has the right to manufacture and distribute Neuron
Chips using technology licensed from the Company and the Company is required
to provide support and unspecified updates to the licensed technology. During
the year ended December 31, 1997, the Company recognized $360,000 in
 
                                      49
<PAGE>
 
revenues from Motorola pursuant to the Motorola agreement, which were
comprised of $225,000 related to the amortization of the prepaid royalty
amount and $135,000 in variable royalty payments received during the year. The
Motorola agreement expires in December 1999 unless renewed. However, Motorola
has the right to terminate the agreement at any time. Further, pursuant to the
terms of the stock purchase agreement under which Motorola initially acquired
its shares, Motorola has agreed to vote (i) all of its shares in favor of the
slate of director nominees recommended by the Board of Directors, and (ii) a
number of shares equal to at least that percentage of shares voted by all
other stockholders for or against any given matter, as recommended by the
Board of Directors (except certain matters relating to certain changes to the
Company's charter, liquidations, a sale of the Company or a merger of the
Company into another entity), as recommended by a majority of the Board of
Directors. See "Risk Factors--Dependence on Key Manufacturers" and "--
 Control by Existing Stockholders" and "Business--Strategic Alliances."
 
  From time to time beginning April 1998, Dr. Oshman uses private air travel
services for business trips for himself and for any employees accompanying
him. These private air travel services are provided by certain entities
controlled by Dr. Oshman or Mr. Markkula. The net cash outlay to the Company
with respect to such private air travel services is no greater than comparable
first class commercial air travel services. Such net outlays to date have not
been material.
 
                                      50
<PAGE>
 
                            PRINCIPAL STOCKHOLDERS
 
  The following table sets forth the beneficial ownership of the Company's
Common Stock as of June 30, 1998, by all persons known to the Company to be
the beneficial owners of more than 5% of the Company's Common Stock, by each
director, by each of the Named Executive Officers, and by all directors and
executive officers as a group. Except as otherwise indicated in the footnotes
to the table, the persons and entities named in the table have sole voting and
investment power with respect to all shares beneficially owned, subject to
community property laws, where applicable.
 
<TABLE>
<CAPTION>
                                                                           PERCENTAGE OF SHARES
                                                                           BENEFICIALLY OWNED(1)
                                                                           ------------------------
                                                       NUMBER OF SHARES      BEFORE        AFTER
NAME OF BENEFICIAL OWNER                             BENEFICIALLY OWNED(1)  OFFERING      OFFERING
- ------------------------                             --------------------- ----------    ----------
<S>                                                  <C>                   <C>           <C>
M. Kenneth Oshman(2)................................       5,180,413               18.7%         15.8%
 Echelon Corporation
 4015 Miranda Avenue
 Palo Alto, CA 94304
Motorola, Inc.
Bertrand F. Cambou(3)...............................       3,912,381               14.3          12.1
 1303 East Algonquin Road
 Schaumburg, IL 60196
Armas Clifford Markkula, Jr.(4).....................       1,577,038                5.8           4.9
 c/o ACM Investments
 P.O. Box 620170
 Woodside, CA 94062
Beatrice Yormark(5).................................       1,018,000                3.7           3.1
Oliver R. Stanfield(6)..............................         975,000                3.5           3.0
Arthur Rock(7)......................................         717,716                2.6           2.2
Kenneth E. Lavezzo(8)...............................         500,000                1.8           1.5
Robert R. Maxfield(9)...............................         436,966                1.6           1.4
James M. Kasson(10).................................         437,500                1.6           1.3
Richard M. Moley(11)................................          85,303                  *             *
Larry W. Sonsini(12)................................          82,500                  *             *
All Officers and Directors as a Group (17 persons)
 (13)...............................................      16,440,317               55.3%         47.3%
</TABLE>
- --------
  *  Represents less than 1% of the Company's Common Stock outstanding as of
     June 30, 1998.
 (1) The number of shares outstanding and percent of ownership is based on:
     (i) 27,358,206 shares of Common Stock outstanding as of June 30, 1998;
     and (ii) 32,358,206 shares of Common Stock outstanding upon the closing
     of this offering. Unless otherwise indicted below, the persons and
     entities named in the table have sole voting and sole investment power
     with respect to all shares of Common Stock beneficially owned, subject to
     community property laws where applicable. The shares of Common Stock
     issuable pursuant to options and warrants that are currently exercisable
     or exercisable within 60 days of June 30, 1998 are deemed to be
     outstanding and to be beneficially owned by the person holding such
     options for the purpose of computing the percentage ownership of such
     person, but are not deemed to be outstanding and to be beneficially owned
     for the purpose of computing the percentage ownership of any other
     person.
 (2) Includes 4,395,700 shares of Common Stock held by M. Kenneth Oshman and
     Barbara S. Oshman, Trustees of the Oshman Trust dated July 10, 1979, and
     435,000 shares held by O-S Ventures, of which Mr. Oshman is general
     partner, and excludes an aggregate of 36,000 shares held by trusts, not
     for the benefit of Mr. Oshman, of which Mr. Oshman serves as trustee.
     Includes a warrant to purchase 249,713 shares of Common Stock exercisable
     within 60 days of June 30, 1998. Includes an option to purchase 100,000
     shares of Common Stock exercisable within 60 days of June 30, 1998, none
     of which are vested at June 30, 1998. The Company has the right, but not
     the obligation, to repurchase 812,500 shares owned by Mr. Oshman if he
     should discontinue his employment with the Company. This repurchase right
     expires on various future dates through September 17, 2000.
 
                                      51
<PAGE>
 
 (3) All 3,912,381 shares are held by Motorola, Inc. Dr. Cambou, a director of
     the Company, is Senior Vice President and General Manager of the
     Networking and Computing Group of Motorola, Inc. and may be deemed to be
     a beneficial owner of shares held by such corporation. Dr. Cambou
     disclaims beneficial ownership of such shares.
 (4) Includes 1,379,927 shares of Common Stock held by Armas Clifford
     Markkula, Jr. and Linda Kathryn Markkula, Trustees of the Restated Arlin
     Trust Dated December 12, 1990, and 151,928 shares held by Markkula Family
     Limited Partnership (the "Markkula Partnership"). Mr. and Mrs. Markkula
     disclaim beneficial ownership of all but 27,500 of the shares held by the
     Markkula Partnership. Includes a warrant to purchase 40,183 shares of
     Common Stock exercisable within 60 days of June 30, 1998. The Company has
     the right, but not the obligation, to repurchase 7,500 shares owned by
     Mr. Markkula if he should cease to serve on the Company's Board of
     Directors. This repurchase right expires on various future dates through
     April 23, 2002.
 (5) Includes 668,000 shares held by Justin C. Walker and Beatrice Yormark,
     Trustees of the Walker-Yormark Family Trust Dated October 2, 1992 (the
     "Walker-Yormark Trust"). Includes options to purchase 350,000 shares of
     Common Stock exercisable within 60 days of June 30, 1998, of which
     112,500 shares are vested at June 30, 1998. The Company has the right,
     but not the obligation, to repurchase 50,000 shares owned by the Walker-
     Yormark Trust if Ms. Yormark should discontinue her employment with the
     Company. This repurchase right expires on various future dates through
     May 23, 1999.
 (6) Includes an aggregate of 170,600 shares held in individual retirement
     accounts for the benefit of Mr. Stanfield and his wife. Includes options
     to purchase 350,000 shares of Common Stock exercisable within 60 days of
     June 30, 1998, of which 112,500 shares are vested at June 30, 1998. The
     Company has the right, but not the obligation, to repurchase 43,750
     shares owned by Mr. Stanfield if he should discontinue his employment
     with the Company. This repurchase right expires on various future dates
     through May 23, 1999.
 (7) Includes 20,000 shares held by a trust for the benefit of Mr. Rock's
     wife, of which Mr. Rock serves as trustee, and as to which Mr. Rock
     disclaims beneficial ownership. Includes 2,000 shares held by a trust,
     not for the benefit of Mr. Rock, of which Mr. Rock has sole voting and
     dispositive power, and as to which Mr. Rock disclaims beneficial
     ownership. Includes a warrant to purchase 29,187 shares of Common Stock
     exercisable within 60 days of June 30, 1998. The Company has the right,
     but not the obligation, to repurchase 7,500 shares owned by Mr. Rock if
     he should cease to serve on the Company's Board of Directors. This
     repurchase right expires on various future dates through April 23, 2002.
 (8) Includes options to purchase 43,750 shares of Common Stock exercisable
     within 60 days of June 30, 1998, none of which shares are vested at June
     30, 1998. The Company has the right, but not the obligation, to
     repurchase 93,750 shares owned by Mr. Lavezzo if he should discontinue
     his employment with the Company. This repurchase right expires on various
     future dates through June 10, 2001.
 (9) Includes a warrant to purchase 15,736 shares of Common Stock exercisable
     within 60 days of June 30, 1998. The Company has the right, but not the
     obligation, to repurchase 7,500 shares owned by Mr. Maxfield if he should
     cease to serve on the Company's Board of Directors. This repurchase right
     expires on various future dates through April 23, 2002.
(10) Includes options to purchase 187,500 shares of Common Stock exercisable
     within 60 days of March 31, 1998, of which 62,500 shares are vested at
     June 30, 1998. The Company has the right, but not the obligation, to
     repurchase 87,500 shares owned by Mr. Kasson if he should discontinue his
     employment with the Company. This repurchase right expires on various
     future dates through November 17, 1999.
(11) Includes a warrant to purchase 10,000 shares of Common Stock exercisable
     within 60 days of June 30, 1998. Includes an option to purchase 25,000
     shares of Common Stock exercisable within 60 days of June 30, 1998, 6,250
     of which shares are vested at June 30, 1998.
(12) Includes 60,000 shares held by investment accounts of Wilson Sonsini
     Goodrich & Rosati, Professional Corporation ("WSGR"). Mr. Sonsini is
     Chairman of the Executive Committee of WSGR and disclaims beneficial
     ownership of such shares except as to those shares in which he has a
     pecuniary interest. Includes options to purchase 20,000 shares of Common
     Stock exercisable within 60 days of June 30, 1998, of which 12,500 shares
     are vested at June 30, 1998.
 
                                      52
<PAGE>
 
(13) Includes warrants to purchase an aggregate of 344,819 shares of Common
     Stock exercisable within 60 days of June 30, 1998. Includes options to
     purchase an aggregate of 2,046,250 shares of Common Stock exercisable
     within 60 days of June 30, 1998, of which 588,750 shares are vested at
     June 30, 1998. The Company has the right, but not the obligation, to
     repurchase an aggregate of 1,270,000 shares owned by the Company's
     officers and directors if such officers and directors should discontinue
     their employment with the Company or cease to serve on the Company's Board
     of Directors. This repurchase right expires on various future dates
     through April 23, 2002.
 
                                       53
<PAGE>
 
                         DESCRIPTION OF CAPITAL STOCK
 
  Upon the closing of this Offering, the authorized capital stock of the
Company will consist of 100,000,000 shares of Common Stock and 5,000,000
shares of Preferred Stock. The following summary of certain provisions of the
Common Stock and Preferred Stock does not purport to be complete and is
subject to, and qualified in its entirety by, the provisions of the Company's
Amended and Restated Certificate of Incorporation which is included as an
exhibit to the Registration Statement of which this Prospectus is a part and
by the provisions of applicable law.
 
COMMON STOCK
 
  The holders of Common Stock are entitled to one vote for each share held of
record on all matters submitted to a vote of stockholders. Subject to the
preferences that may be applicable to any outstanding Preferred Stock, the
holders of Common Stock are entitled to receive ratably the dividends, if any,
that may be declared from time to time by the Board of Directors out of funds
legally available for such dividends. The Company has never declared a
dividend and does not anticipate doing so in the foreseeable future. In the
event of a liquidation, dissolution or winding up of the Company, subject to
the prior rights of any outstanding shares of Preferred Stock, the holders of
Common Stock are entitled to share ratably in any remaining assets after
payment of liabilities. The Common Stock has no preemptive rights or
redemption or sinking fund provisions applicable to shares of Common Stock.
All of the outstanding shares of Common Stock are fully paid and
nonassessable.
 
PREFERRED STOCK
 
  Pursuant to the Company's Amended and Restated Certificate of Incorporation
effective after conversion of previously outstanding shares of Preferred Stock
into an aggregate of 7,887,381 shares of Common Stock, which conversion will
be effected simultaneously with the consummation of this offering, the Board
of Directors has the authority, without further action by the stockholders, to
issue up to 5,000,000 shares of Preferred Stock in one or more series and to
fix the designations, powers, preferences, privileges, and relative
participating, optional or special rights and the qualifications, limitations
or restrictions thereof, including dividend rights, conversion rights, voting
rights, terms of redemption and liquidation preferences, any or all of which
may be greater than the rights of the Common Stock. The Board of Directors,
without stockholder approval, can issue Preferred Stock with voting,
conversion or other rights that could adversely affect the voting power and
other rights of the holders of Common Stock. Preferred Stock could thus be
issued quickly with terms calculated to delay or prevent a change in control
of the Company or make removal of management more difficult. Additionally, the
issuance of Preferred Stock may have the effect of decreasing the market price
of the Common Stock, and may adversely affect the voting and other rights of
the holders of Common Stock. At present, there are no shares of Preferred
Stock outstanding and the Company has no plans to issue any of the Preferred
Stock. See "Risk Factors--Anti-Takeover Provisions."
 
COMMON STOCK WARRANTS
 
  As of the date of this Prospectus, the Company has warrants outstanding
exercisable to purchase an aggregate of 430,000 shares of Common Stock.
 
  In February 1994, the Company issued warrants to purchase an aggregate of
30,000 shares of Common Stock at a per share exercise price of $12.00. These
warrants are exercisable at any time until their expiration on the earlier of
February 2, 1999 or the consummation of a merger of the Company with another
entity or the sale of substantially all of the Company's assets, whereby the
holders of the Company's voting securities prior to such transaction do not
hold more than 50% of the voting securities of the surviving entity following
such transaction (a "Change in Control").
 
  In addition, in May 1997, the Company issued warrants to purchase an
aggregate of 400,000 shares of Common Stock at a per share exercise price of
$5.00. These warrants are exercisable at any time until their expiration on
the earlier of May 15, 2002 or a Change in Control. Each warrant contains a
cashless conversion right that allows the holder to receive a number of shares
of the Company's Common Stock equal to the quotient
 
                                      54
<PAGE>
 
obtained by dividing (x) the value of the warrant on the date of exercise,
which value is determined by subtracting (a) the aggregate exercise price of
the warrant from (b) the aggregate fair market value of the warrant shares on
the date of exercise, by (y) the fair market value of one share of the
Company's Common Stock.
 
  Registration Rights. After this offering, the holders of approximately
18,665,548 shares of Common Stock will be entitled to certain rights with
respect to the registration of such shares under the Securities Act (the
"Registrable Securities"). Under the terms of the Company's Amended and
Restated Modification Agreement (the "Modification Agreement"), subject to
certain conditions, if the Company proposes to register any of its securities
under the Securities Act, either for its own account or for the account of
other security holders, other than in connection with a registration relating
to shares of capital stock of the Company under employee benefit plans (such
as shares of Common Stock issuable upon exercise of Options granted under the
1997 Plan), the Company is required to include the Registrable Securities in
such registration. In addition, beginning one year after the date of this
Prospectus and subject to certain conditions, the holders of not less than 50%
of the Registrable Securities may also require the Company, on not more than
two occasions, to file a registration statement under the Securities Act with
respect to at least 1,500,000 of Registrable Securities. Further, if the
Company is a registrant entitled to use Form S-3, the holders of Registrable
Securities may require the Company to file a registration statement on Form S-
3 under the Securities Act with respect to such Registrable Securities,
subject to certain conditions and limitations. See "Risk Factors--Shares
Eligible for Future Sale" and "Shares Eligible for Future Sale."
 
DELAWARE LAW AND CERTAIN CHARTER AND BYLAW PROVISIONS
 
  The Company is subject to Section 203 of the Delaware General Corporation
Law ("Section 203"), which, subject to certain exceptions, prohibits a
Delaware corporation from engaging in any business combination with any
"interested stockholder" for a period of three (3) years following the date
that such stockholder became an interested stockholder, unless: (i) prior to
such date, the board of directors of the corporation approved either the
business combination or the transaction that resulted in the stockholder
becoming an interested stockholder; (ii) upon consummation of the transaction
that resulted in the stockholder becoming an interested stockholder, the
interested stockholder owned at least 85% of the voting stock of the
corporation outstanding at the time the transaction commenced, excluding, for
purposes of determining the number of shares outstanding, those shares owned
(x) by persons who are directors and also officers and (y) by employee stock
plans in which employee participants do not have the right to determine
confidentially whether shares held subject to the plan will be tendered in a
tender or exchange offer; or (iii) on or subsequent to such date, the business
combination is approved by the board of directors and authorized at an annual
or special meeting of stockholders, and not by written consent, by the
affirmative vote of at least 66 2/3% of the outstanding voting stock that is
not owned by the interested stockholder.
 
  Section 203 defines business combination to include: (i) any merger or
consolidation involving the corporation and the interested stockholder; (ii)
any sale, transfer, pledge or other disposition of 10% or more of the assets
of the corporation involving the interested stockholder; (iii) subject to
certain exceptions, any transaction that results in the issuance or transfer
by the corporation of any stock of the corporation to the interested
stockholder; (iv) any transaction involving the corporation that has the
effect of increasing the proportionate share of the stock of any class or
series of the corporation beneficially owned by the interested stockholder; or
(v) the receipt by the interested stockholder of the benefit of any loans,
advances, guarantees, pledges or other financial benefits provided by or
through the corporation. In general, Section 203 defines an interested
stockholder as any entity or person beneficially owning 15% or more of the
outstanding voting stock of the corporation and any entity or person
affiliated with or controlling or controlled by such entity or person.
 
  The Company's Amended and Restated Certificate of Incorporation requires
that any action required or permitted to be taken by the stockholders of the
Company must be effected at a duly called annual or special meeting of the
stockholders and may not be effected by a consent in writing. In addition, as
provided by the Company's Bylaws, special meetings of the stockholders of the
Company may be called only by the Board of Directors. The Amended and Restated
Certificate of Incorporation also provides that, beginning upon the closing of
this offering, the Board of Directors will be divided into three classes, with
each class serving staggered three-
 
                                      55
<PAGE>
 
year terms, and that certain amendments of the Company's Amended and Restated
Certificate of Incorporation and certain amendments by the stockholders of the
Company's Bylaws, require the approval of holders of at least 66 2/3% of the
voting power of all outstanding stock. These provisions may have the effect of
deferring hostile takeovers or delaying changes in control or management of
the Company. See "Risk Factors--Antitakover Provisions."
 
TRANSFER AGENT AND REGISTRAR
 
  The Transfer Agent and Registrar for the Company's Common Stock is
ChaseMellon Shareholder Services, L.L.C.
 
LISTING
 
  The Company's Common Stock has been approved for listing on the Nasdaq
National Market under the symbol ELON.
 
                                      56
<PAGE>
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
  Upon completion of this offering, based on the outstanding shares of Common
Stock at March 31, 1998, the Company will have outstanding 32,125,612 shares
of Common Stock (32,875,612 if the Underwriters' over-allotment option is
exercised in full). Of these shares, the 5,000,000 shares sold in this
offering (5,750,000 if the Underwriters' over-allotment option is exercised in
full) will be freely tradeable without restriction or further registration
under the Securities Act unless such shares are owned by "affiliates" of the
Company as that term is defined under Rule 144 under the Securities Act.
247,375 shares are held by existing stockholders pursuant to a Regulation A
Offering Statement and will become eligible for sale 180 days after the date
of this Prospectus upon the expiration of contractual lock-up agreements which
provide that the holders of these shares shall not sell or otherwise transfer
such shares for a period of 180 days after the date of this Prospectus. The
remaining 26,878,237 shares of Common Stock held by existing stockholders are
deemed to be "restricted" securities within the meaning of the Securities Act
and may be publicly sold only if registered under the Securities Act or sold
in accordance with an applicable exemption from registration, such as those
provided by Rule 144 promulgated under the Securities Act, as described below.
 
  In addition to the 5,000,000 shares sold in this offering, 483,674 shares of
Common Stock held by existing stockholders will be immediately eligible for
sale in the public market without restriction pursuant to Rule 144(k). The
remaining 26,641,938 shares of Common Stock (including 247,375 shares covered
by the Regulation A Offering Statement) will be eligible for sale beginning
180 days after the date of this Prospectus upon the expiration of contractual
lock-up agreements which provide that the holders of these shares shall not
sell or otherwise transfer such shares for a period of 180 days after the date
of this Prospectus. See "Risk Factors--Shares Eligible for Future Sale."
 
  In general, under Rule 144 as currently in effect, if one year has elapsed
since the later of the date of acquisition of restricted securities from the
Company or from an "affiliate" of the Company, as that term is defined under
the Securities Act, the acquiror or subsequent holder would be entitled to
sell within any three-month period commencing 90 days after the date of this
Prospectus a number of those shares that does not exceed the greater of one
percent of the number of shares of such class of stock then outstanding or the
average weekly trading volume of the shares of such class of stock during the
four calendar weeks preceding the filing of a Form 144 with respect to such
sale. Sales under Rule 144 are also subject to certain manner of sale
provisions and notice requirements and to the availability of current public
information about the Company. In addition, if two years have elapsed since
the later of the date of acquisition of restricted securities from the Company
or from any affiliate of the Company, and the acquirer or subsequent holder
thereof is deemed not to have been an affiliate of the Company of such
restricted securities at any time during the 90 days preceding a sale, such
person would be entitled to sell such restricted securities under Rule 144(k)
without regard to the requirements described above.
 
  Following this offering, the Company intends to file a registration
statement under the Securities Act covering shares of Common Stock reserved
for issuance under the Company's stock plans (other than shares issued upon
the exercise of options prior to the effective date of such registration
statement). Based on the number of shares of Common Stock subject to
outstanding options as of March 31, 1998 and the number of shares of Common
Stock reserved for issuance, such registration statement would cover
approximately 8,025,395 shares (including 4,082,695 shares subject to
outstanding options at March 31, 1998). Such registration statement will
automatically become effective upon filing. Shares of Common Stock issued
under the Company's Stock Plans after the effective date of such registration
will be freely tradeable in the public market, subject to the 180 day lock-up
referred to above and subject in the case of sales by affiliates to the volume
limitation, manner of sale, notice and public information requirements of Rule
144.
 
  No prediction can be made of the effect, if any, that sales of shares under
Rule 144 or the availability of shares for sale will have on the market price
of the Common Stock prevailing from time to time after this offering. The
Company is unable to estimate the number of shares that may be sold in the
public market under Rule 144, because such amount will depend on the trading
volume in, and market price for, the Common Stock
 
                                      57
<PAGE>
 
and other factors. Nevertheless, sales of substantial amounts of shares in the
public market, or the perception that such sales could occur, could adversely
affect the market price of the Common Stock. See "Underwriting."
 
  After this offering, the holders of approximately 18,665,548 shares of
Common Stock will be entitled to certain rights with respect to registration
of such shares under the Securities Act. Registration of such shares under the
Securities Act would result in such shares becoming freely tradeable without
restriction under the Securities Act (except for shares purchased by
affiliates of the Company pursuant to any such registration) immediately upon
the effectiveness of such registration. Such registration rights terminate for
each holder to the extent such holder's shares may be sold within a given
three month period under Rule 144 or other applicable exemption. See
"Description of Capital Stock--Registration Rights."
 
                                      58
<PAGE>
 
                                 UNDERWRITING
 
  The Underwriters named below, represented by NationsBanc Montgomery
Securities LLC, BancAmerica Robertson Stephens and Volpe Brown Whelan &
Company, LLC (the "Representatives"), have severally agreed, subject to the
terms and conditions set forth in the Underwriting Agreement, to purchase from
the Company the number of shares of Common Stock indicated below opposite
their respective names at the initial public offering price less the
underwriting discount set forth on the cover page of this Prospectus. The
Underwriting Agreement provides that the obligations of the Underwriters to
pay for and accept delivery of the shares of Common Stock are subject to
certain conditions precedent, and that the Underwriters are committed to
purchase all of such shares, if any are purchased.
 
<TABLE>
<CAPTION>
                                                                        NUMBER
   UNDERWRITERS                                                        OF SHARES
   ------------                                                        ---------
   <S>                                                                 <C>
   NationsBanc Montgomery Securities LLC.............................. 1,578,875
   BancAmerica Robertson Stephens.....................................   996,000
   Volpe Brown Whelan & Company, LLC..................................   745,125
   BT Alex. Brown Incorporated........................................   160,000
   CIBC Oppenheimer Corp..............................................   160,000
   Donaldson, Lufkin & Jenrette Securities Corporation................   160,000
   Hambrecht & Quist LLC..............................................   160,000
   Morgan Stanley & Co. Incorporated..................................   160,000
   SBC Warburg Dillon Read Inc........................................   160,000
   Cruttenden Roth Incorporated.......................................    90,000
   Dain Rauscher Wessels..............................................    90,000
   EVEREN Securities, Inc.............................................    90,000
   Gerard Klauer Mattison & Co., LLC..................................    90,000
   John G. Kinnard & Company, Incorporated............................    90,000
   Soundview Financial Group..........................................    90,000
   Loewenbaum & Company Incorporated..................................    90,000
   H.C. Wainwright & Co., Inc.........................................    90,000
                                                                       ---------
     Total............................................................ 5,000,000
                                                                       =========
</TABLE>
 
  The Representatives have advised the Company that the Underwriters initially
propose to offer the shares of Common Stock to the public on the terms set
forth on the cover page of this Prospectus. The Underwriters may allow to
selected dealers a concession of not more than $0.25 per share, and the
Underwriters may allow, and such dealers may reallow, a concession of not more
than $0.10 per share to certain other dealers. After this offering, the
offering price and concessions and reallowances to dealers may be changed by
the Representatives. The Common Stock is offered subject to receipt and
acceptance by the Underwriters and to certain other conditions, including the
right to reject orders in whole or in part.
 
  The Company has granted an option to the Underwriters, exercisable during
the 30-day period after the date of this Prospectus, to purchase up to a
maximum of 750,000 additional shares of Common Stock to cover over-allotments,
if any, at the same price per share as the initial 5,000,000 shares to be
purchased by the Underwriters. To the extent that the Underwriters exercise
this option, each of the Underwriters will be committed, subject to certain
conditions, to purchase such additional shares in approximately the same
proportion as set forth in the above table. The Underwriters may purchase such
shares only to cover over-allotments made in connection with this offering.
 
  The directors, officers and certain stockholders of the Company holding in
the aggregate 20,558,361 shares of Common Stock after this offering have
agreed that, for a period of 180 days after the date of this Prospectus, they
will not, without the prior written consent of NationsBanc Montgomery
Securities LLC, directly or indirectly sell, offer to sell or otherwise
dispose of any such shares of Common Stock or any right to acquire such
shares. In addition, the Company has agreed that, for a period of 180 days
after the date of this Prospectus,
 
                                      59
<PAGE>
 
it will not, without the prior written consent of NationsBanc Montgomery
Securities LLC, issue, offer, sell, grant options to purchase or otherwise
dispose of any of the Company's equity securities or any other securities
convertible into or exercisable or exchangeable for the Common Stock or other
equity security, other than the grant of options to purchase Common Stock or
the issuance of shares of Common Stock under the Company's stock option and
stock purchase plans and the issuance of shares of Common Stock pursuant to
the exercise of outstanding options and warrants.
 
  Under the terms of the Company's Stock Option Plans, the Modification
Agreement and representations made by various stockholders, the holders of
approximately 6,118,963 additional shares of the Company's Common Stock have
agreed not to sell or transfer their shares prior to the expiration of 180
days after the date of this Prospectus. The Company has agreed not to waive
any such restriction without the prior written consent of NationsBanc
Montgomery Securities LLC.
 
  The Underwriting Agreement provides that the Company will indemnify the
several Underwriters against certain liabilities, including civil liabilities
under the Securities Act, or will contribute to payments the Underwriters may
be required to make in respect thereof.
 
  Prior to this offering, there has been no public market for the Common
Stock. Consequently, the initial public offering price was determined by
negotiations between the Company and the Representatives. Among the factors
considered in such negotiations were the history of, and the prospects for,
the Company and the industry in which it competes, an assessment of the
Company's management, the Company's past and present operations, its past and
present financial performance, the prospects for future earnings of the
Company, the present state of the Company's development, the general condition
of the securities markets at the time of this offering and the market prices
of and demand for publicly traded common stock of comparable companies in
recent periods and other factors deemed relevant.
 
  Certain persons participating in this offering may engage in transactions
that stabilize, maintain or otherwise affect the price of the Common Stock
offered hereby. Such transactions may include stabilizing, the purchase of
Common Stock to cover syndicate short positions and the imposition of penalty
bids. A stabilizing bid means the placing of any bid or the effecting of any
purchase for the purpose of pegging, fixing or maintaining the price of the
Common Stock. A syndicate covering transaction means the placing of any bid on
behalf of the underwriting syndicate or the effecting of any purchase to
reduce a short position created in connection with this offering. A penalty
bid means an arrangement that permits the Underwriters to reclaim a selling
concession from a syndicate member in connection with this offering when
shares of Common Stock sold by the syndicate member are purchased in syndicate
covering transactions. Such transactions may stabilize or maintain the market
price of the Common Stock at a level above that which otherwise might prevail
in the open market and, if commenced, may be discontinued at any time.
 
  The Underwriters have reserved for sale, at the initial public offering
price, up to 250,000 shares of the Common Stock offered hereby for certain
individuals designated by the Company who have expressed an interest in
purchasing such shares of Common Stock in the offering. The number of shares
available for sale to the general public will be reduced to the extent such
persons purchase such reserved shares. Any reserved shares not so purchased
will be offered by the Underwriters to the general public on the same basis as
other shares offered hereby.
 
  The Representatives have informed the Company that the Underwriters do not
expect to make sales to accounts over which they exercise discretionary
authority in excess of 5% of the number of shares of Common Stock offered
hereby.
 
  Mr. Arthur Rock, one of the Company's directors, has an ownership interest
in Volpe Brown Whelan & Company, LLC.
 
                                      60
<PAGE>
 
                                 LEGAL MATTERS
 
  Certain legal matters with respect to the legality of the issuance of the
shares of Common Stock offered hereby will be passed upon for the Company by
Wilson Sonsini Goodrich & Rosati, Professional Corporation ("WSGR"), Palo
Alto, California. Certain legal matters in connection with this offering will
be passed upon for the Underwriters by Brobeck, Phleger & Harrison LLP.
Messrs. Larry W. Sonsini and John V. Roos, who are members of WSGR, own 22,500
and 5,000 shares, respectively, of Common Stock. In addition, 60,000 shares of
Common Stock are held by investment accounts of WSGR, in which Messrs. Sonsini
and Roos are participants.
 
                                    EXPERTS
 
  The Consolidated Financial Statements included in this Prospectus have been
audited by Arthur Andersen LLP, independent public accountants, to the extent
and for the periods indicated in their report and are included herein in
reliance upon the authority of said firm as experts in giving said report.
 
                            ADDITIONAL INFORMATION
 
  The Company has filed with the Securities and Exchange Commission (the
"Commission") a Registration Statement (of which this Prospectus is a part and
which term shall encompass any amendments thereto) on Form S-1 pursuant to the
Securities Act with respect to the Common Stock offered hereby. This
Prospectus does not contain all the information set forth in the Registration
Statement and the exhibits and schedules thereto, certain portions of which
are omitted as permitted by the rules and regulations of the Commission.
Statements made in this Prospectus as to the contents of any contract,
agreement or other document referred to are not necessarily complete. With
respect to any such contract, agreement or other document filed as an exhibit
to the Registration Statement, reference is made to the exhibit for a more
complete description of the matters involved, and each such statement shall be
deemed qualified in its entirety by such reference.
 
  Upon completion of the Offering, the Company will be subject to the
information requirements of the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), and, in accordance therewith, will file reports and
other information with the Commission. The Registration Statement, the
exhibits and schedules forming a part thereof and the report and other
information filed by the Company with the Commission in accordance with the
Exchange Act may be inspected and copied at the public reference facilities
maintained by the Commission at Room 1024, Judiciary Plaza, 450 Fifth Street,
N.W., Washington, D.C. 20549; 7 World Trade Center, 13th Floor, New York, New
York 10048; and Northwestern Atrium Center, 500 West Madison Street, Suite
1400, Chicago, Illinois 60661-2511. Copies of such material can also be
obtained at prescribed rates from the Public Reference Section of the
Commission, 450 Fifth Street, N.W., Washington, D.C. 20549. Such material may
also be accessed electronically by means of the Commission's home page on the
Internet at http://www.sec.gov.
 
  The Company intends to furnish to its stockholders annual reports containing
audited consolidated financial statements examined by an independent
accounting firm and quarterly reports for the first three quarters of each
fiscal year containing interim unaudited consolidated financial information.
 
                                      61
<PAGE>
 
                              ECHELON CORPORATION
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                                          <C>
Report of Independent Public Accountants.................................... F-2
Consolidated Balance Sheets................................................. F-3
Consolidated Statements of Operations....................................... F-4
Consolidated Statements of Stockholders' Equity............................. F-5
Consolidated Statements of Cash Flows....................................... F-6
Notes to Consolidated Financial Statements.................................. F-7
</TABLE>
 
                                      F-1
<PAGE>
 
                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Echelon Corporation:
 
  We have audited the accompanying consolidated balance sheets of Echelon
Corporation (a Delaware corporation) and subsidiaries as of December 31, 1996
and 1997, and the related consolidated statements of operations, stockholders'
equity and cash flows for each of the three years in the period ended December
31, 1997. These financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these financial
statements based on our audits.
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
 
  In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Echelon Corporation and
subsidiaries as of December 31, 1996 and 1997, and the results of their
operations and their cash flows for each of the three years in the period
ended December 31, 1997 in conformity with generally accepted accounting
principles.
 
                                          ARTHUR ANDERSEN LLP
 
San Jose, California
February 17, 1998
 
                                      F-2
<PAGE>
 
                              ECHELON CORPORATION
 
                          CONSOLIDATED BALANCE SHEETS
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                     MARCH 31,
                                                                       1998
                                      DECEMBER 31,                   PRO FORMA
                                    ------------------  MARCH 31,  STOCKHOLDERS'
                                      1996      1997      1998        EQUITY
                                    --------  --------  ---------  -------------
                                                              (UNAUDITED)
<S>                                 <C>       <C>       <C>        <C>
              ASSETS
CURRENT ASSETS:
 Cash and cash equivalents......... $  8,051  $  4,872  $  5,165
 Short-term investments............      --      2,981       --
 Accounts receivable, net of
  allowances of $819, $562 and
  $857, respectively...............    3,231     3,810     4,486
 Inventories.......................    1,592     2,444     3,176
 Other current assets..............    1,346     1,196     1,382
                                    --------  --------  --------
   Total current assets............   14,220    15,303    14,209
                                    --------  --------  --------
PROPERTY AND EQUIPMENT:
 Computer and other equipment......    6,486     6,816     6,832
 Furniture and fixtures............    1,297     1,323     1,337
 Leasehold improvements............      543       548       526
                                    --------  --------  --------
                                       8,326     8,687     8,695
 Less: Accumulated depreciation and
  amortization.....................   (6,691)   (7,174)   (7,209)
                                    --------  --------  --------
   Net property and equipment......    1,635     1,513     1,486
                                    --------  --------  --------
                                    $ 15,855  $ 16,816  $ 15,695
                                    ========  ========  ========
   LIABILITIES AND STOCKHOLDERS'
              EQUITY
CURRENT LIABILITIES:
 Accounts payable.................. $  1,800  $  2,081  $  2,758
 Accrued payroll and related
  expenses.........................    1,045     1,081     1,027
 Accrued liabilities...............      617       907       793
 Current portion of deferred
  revenues.........................    2,853     2,351     2,255
                                    --------  --------  --------
   Total current liabilities.......    6,315     6,420     6,833
                                    --------  --------  --------
LONG-TERM LIABILITIES:
 Deferred rent, net of current
  portion..........................      377       246       198
 Deferred revenues, net of current
  portion..........................    2,025     1,350     1,182
                                    --------  --------  --------
   Total long-term liabilities.....    2,402     1,596     1,380
                                    --------  --------  --------
STOCKHOLDERS' EQUITY:
 Convertible preferred stock, $.01
  par value; aggregate liquidation
  preference of $60,294 at December
  31, 1997:
  Authorized--11,000,000 shares
  Outstanding--(Series B, C, D and
   E)--5,887,381 shares in 1996,
   7,887,381 shares in 1997 and at
   March 31, 1998; 5,000,000 shares
   authorized, none issued and
   outstanding pro forma (Note 8)..       59        79        79     $    --
 Common stock, $.01 par value:
  Authorized--50,000,000 shares
  Outstanding--18,494,020,
   18,832,430 and 19,238,231 shares
   in 1996, 1997 and at March 31,
   1998, respectively; 100,000,000
   shares authorized, 27,125,612
   shares outstanding pro forma....      185       188       192          271
 Additional paid-in capital........   83,359    93,532    94,530       94,530
 Deferred compensation.............      --        --       (519)        (519)
 Cumulative translation
  adjustment.......................      (31)     (351)     (415)        (415)
 Accumulated deficit...............  (76,434)  (84,648)  (86,385)     (86,385)
                                    --------  --------  --------     --------
   Total stockholders' equity......    7,138     8,800     7,482     $  7,482
                                    --------  --------  --------     ========
                                    $ 15,855  $ 16,816  $ 15,695
                                    ========  ========  ========
</TABLE>
 
   The accompanying notes are an integral part of these consolidated balance
                                    sheets.
 
                                      F-3
<PAGE>
 
                              ECHELON CORPORATION
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                              FOR THE THREE MONTHS
                          FOR THE YEAR ENDED DECEMBER 31,        ENDED MARCH 31,
                         -----------------------------------  ----------------------
                            1995        1996         1997        1997        1998
                         ----------  -----------  ----------  ----------  ----------
                                                                   (UNAUDITED)
<S>                      <C>         <C>          <C>         <C>         <C>
REVENUES:
 Product................ $   20,183      $20,708  $   24,665  $    6,548  $    7,188
 Service................      3,160        3,282       3,637         926         771
                         ----------  -----------  ----------  ----------  ----------
  Total revenues........     23,343       23,990      28,302       7,474       7,959
                         ----------  -----------  ----------  ----------  ----------
COST OF REVENUES:
 Cost of product........      9,434       10,761      11,761       3,111       3,249
 Cost of service........      1,141        1,142       1,810         455         543
                         ----------  -----------  ----------  ----------  ----------
  Total cost of
   revenues.............     10,575       11,903      13,571       3,566       3,792
                         ----------  -----------  ----------  ----------  ----------
  Gross profit..........     12,768       12,087      14,731       3,908       4,167
                         ----------  -----------  ----------  ----------  ----------
OPERATING EXPENSES:
 Product development....      7,355        7,526       7,121       1,740       1,958
 Sales and marketing....     10,881       11,577      12,128       3,014       3,031
 General and
  administrative........      4,386        3,921       4,004       1,098         935
                         ----------  -----------  ----------  ----------  ----------
  Total operating
   expenses.............     22,622       23,024      23,253       5,852       5,924
                         ----------  -----------  ----------  ----------  ----------
  Loss from operations..     (9,854)     (10,937)     (8,522)     (1,944)     (1,757)
                         ----------  -----------  ----------  ----------  ----------
OTHER INCOME (EXPENSE):
 Interest income, net...      1,109          536         429          71          67
 Other income (expense),
  net...................        175         (163)         68          21           8
                         ----------  -----------  ----------  ----------  ----------
  Total other income
   (expense)............      1,284          373         497          92          75
                         ----------  -----------  ----------  ----------  ----------
  Loss before provision
   for income taxes.....     (8,570)     (10,564)     (8,025)     (1,852)     (1,682)
PROVISION FOR INCOME
 TAXES..................        143          152         189          55          55
                         ----------  -----------  ----------  ----------  ----------
 Net loss............... $   (8,713) $   (10,716) $   (8,214) $   (1,907) $   (1,737)
                         ==========  ===========  ==========  ==========  ==========
 Basic net loss per
  share................. $    (0.56) $     (0.62) $    (0.44) $    (0.10) $    (0.09)
                         ==========  ===========  ==========  ==========  ==========
 Shares used in
  computing basic net
  loss per share........     15,695       17,354      18,603      18,511      19,029
                         ==========  ===========  ==========  ==========  ==========
 Pro forma basic net
  loss per share........                          $    (0.32) $    (0.08) $    (0.06)
                                                  ==========  ==========  ==========
 Shares used in
  computing pro forma
  basic
  net loss per share....                              25,756      24,399      26,916
                                                  ==========  ==========  ==========
</TABLE>
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-4
<PAGE>
 
                              ECHELON CORPORATION
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                           CONVERTIBLE
                         PREFERRED STOCK    COMMON STOCK   ADDITIONAL              CUMULATIVE
                         -----------------  --------------  PAID-IN     DEFERRED   TRANSLATION ACCUMULATED
                         SHARES    AMOUNT   SHARES  AMOUNT  CAPITAL   COMPENSATION ADJUSTMENT    DEFICIT    TOTAL
                         --------  -------  ------  ------ ---------- ------------ ----------- ----------- --------
<S>                      <C>       <C>      <C>     <C>    <C>        <C>          <C>         <C>         <C>
BALANCE AT DECEMBER 31,
 1994...................    5,858   $   59  14,830   $148   $79,531      $  --        $  66     $(57,005)  $ 22,799
 Exercise of stock op-
  tions.................      --       --    1,072     11       558         --          --           --         569
 Sale of common stock...      --       --      975     10     1,082         --          --           --       1,092
 Sale of Series D pre-
  ferred stock..........       29      --      --     --        293         --          --           --         293
 Foreign currency trans-
  lation adjustment.....      --       --      --     --        --          --          (62)         --         (62)
 Net loss...............      --       --      --     --        --          --          --        (8,713)    (8,713)
                         --------   ------  ------   ----   -------      ------       -----     --------   --------
BALANCE AT DECEMBER 31,
 1995...................    5,887       59  16,877    169    81,464         --            4      (65,718)    15,978
 Exercise of stock op-
  tions.................      --       --      630      6       514         --          --           --         520
 Sale of common stock,
  net...................      --       --      987     10     1,381         --          --           --       1,391
 Foreign currency trans-
  lation adjustment.....      --       --      --     --        --          --          (35)         --         (35)
 Net loss...............      --       --      --     --        --          --          --       (10,716)   (10,716)
                         --------   ------  ------   ----   -------      ------       -----     --------   --------
BALANCE AT DECEMBER 31,
 1996...................    5,887       59  18,494    185    83,359         --          (31)     (76,434)     7,138
 Exercise of stock op-
  tions.................      --       --      354      3       289         --          --           --         292
 Repurchase of common
  stock, net............      --       --      (16)   --        (16)        --          --           --         (16)
 Sale of Series E pre-
  ferred stock..........    2,000       20     --     --      9,900         --          --           --       9,920
 Foreign currency trans-
  lation adjustment.....      --       --      --     --        --          --         (320)         --        (320)
 Net loss...............      --       --      --     --        --          --          --        (8,214)    (8,214)
                         --------   ------  ------   ----   -------      ------       -----     --------   --------
BALANCE AT DECEMBER 31,
 1997...................    7,887       79  18,832    188    93,532         --         (351)     (84,648)     8,800
 unaudited:
  Exercise of stock
   options..............      --       --      405      4       467         --          --           --         471
  Sale of common stock,
   net..................      --       --        1    --          1         --          --           --           1
  Deferred
   compensation.........      --       --      --     --        530        (530)        --           --         --
  Amortization of
   deferred
   compensation.........      --       --      --     --        --           11         --           --          11
  Foreign currency
   translation
   adjustment...........      --       --      --     --        --          --          (64)         --         (64)
  Net loss..............      --       --      --     --        --          --          --        (1,737)    (1,737)
                         --------   ------  ------   ----   -------      ------       -----     --------   --------
BALANCE AT MARCH 31,
 1998
 (unaudited)............    7,887   $   79  19,238   $192   $94,530      $(519)       $(415)    $(86,385)  $  7,482
                         ========   ======  ======   ====   =======      ======       =====     ========   ========
</TABLE>
 
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-5
<PAGE>
 
                              ECHELON CORPORATION
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                   FOR THE
                                                                THREE MONTHS
                           FOR THE YEAR ENDED DECEMBER 31,     ENDED MARCH 31,
                           ----------------------------------  ----------------
                              1995        1996        1997      1997     1998
                           ----------  ----------  ----------  -------  -------
                                                                 (UNAUDITED)
<S>                        <C>         <C>         <C>         <C>      <C>
CASH FLOWS FROM OPERATING
 ACTIVITIES:
 Net loss................  $   (8,713) $  (10,716) $   (8,214) $(1,907) $(1,737)
 Adjustments to reconcile
  net loss to net cash
  used in operating
  activities:
  Depreciation and
   amortization..........         988         771         715      141      194
  Deferred compensation
   expense...............         --          --          --       --        11
  Loss (gain) on disposal
   of fixed assets.......          10         (13)        --       --       --
  Change in operating
   assets and
   liabilities:
   Accounts receivable...        (929)        332        (579)    (216)    (676)
   Inventories...........        (476)        319        (852)     (18)    (732)
   Other current assets..        (300)        149         150      123     (186)
   Accounts payable......         887        (439)        281     (142)     677
   Accrued liabilities...         231         104         252      (57)    (186)
   Deferred revenues.....        (788)        552      (1,177)    (853)    (264)
   Deferred rent.........         (86)        (69)        (57)     (14)     (30)
                           ----------  ----------  ----------  -------  -------
   Net cash used in
    operating
    activities...........      (9,176)     (9,010)     (9,481)  (2,943)  (2,929)
                           ----------  ----------  ----------  -------  -------
CASH FLOWS FROM INVESTING
 ACTIVITIES:
 Purchase of held-to-
  maturity short-term
  investments............     (31,974)    (10,068)    (10,740)     --       --
 Proceeds from maturities
  of held-to-maturity
  short-term
  investments............      39,313      22,117       7,759      --     2,981
 Capital expenditures....        (882)       (872)       (628)     (84)    (167)
 Proceeds from sale of
  fixed assets...........         --           13          35       14      --
                           ----------  ----------  ----------  -------  -------
   Net cash provided by
    (used in)
    investing activities..      6,457      11,190      (3,574)     (70)   2,814
                           ----------  ----------  ----------  -------  -------
CASH FLOWS FROM FINANCING
 ACTIVITIES:
 Proceeds from issuance
  of preferred and
  common stock...........       1,954       1,911      10,196       16      472
                           ----------  ----------  ----------  -------  -------
EFFECT OF EXCHANGE RATES
 ON CASH.................         (62)        (35)       (320)    (201)     (64)
                           ----------  ----------  ----------  -------  -------
NET INCREASE (DECREASE)
 IN CASH AND
 CASH EQUIVALENTS........        (827)      4,056      (3,179)  (3,198)     293
CASH AND CASH
 EQUIVALENTS:
 Beginning of period.....       4,822       3,995       8,051    8,051    4,872
                           ----------  ----------  ----------  -------  -------
 End of period...........  $    3,995  $    8,051  $    4,872  $ 4,853  $ 5,165
                           ==========  ==========  ==========  =======  =======
SUPPLEMENTAL DISCLOSURES
 OF CASH
 FLOW INFORMATION:
 Cash paid for income
  taxes..................  $      111  $      123  $      185  $    14  $    42
                           ==========  ==========  ==========  =======  =======
</TABLE>
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-6
<PAGE>
 
                              ECHELON CORPORATION
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                               DECEMBER 31, 1997
    (ALL INFORMATION FOR THE THREE MONTHS ENDED MARCH 31, 1997 AND 1998 IS
                                  UNAUDITED)
 
1.  ORGANIZATION OF THE COMPANY:
 
  Echelon Corporation (the "Company") was incorporated in Delaware in January
1989. The Company develops, markets and supports a family of hardware and
software products and services that enable OEMs and systems integrators to
design and implement open, interoperable, distributed control networks. The
Company's products are based on its LonWorks networking technology, an open
standard for interoperable networked control developed by the Company. In a
LonWorks control network, intelligent control devices, called nodes,
communicate using the Company's LonTalk protocol. The Company sells its
products and services to the building, industrial, transportation, home and
other automation markets.
 
  The Company emerged from the development stage during 1990. However, the
Company continues to be subject to the risks and challenges associated with
other companies in a comparable stage of development including among others:
history of losses; fluctuation in operating results; dependence on OEMs and
distribution channels; dependence on key manufacturers; competition;
dependence on key personnel; new products and rapid technological change;
market acceptance of interoperability; international operations and currency
fluctuations; lengthy sales cycle; limited protection of intellectual property
rights; risks of product defects or misuse; regulatory actions.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
 
 Principles of Consolidation
 
  The Company's consolidated financial statements reflect operations of the
Company and its wholly owned subsidiaries. All significant intercompany
transactions and balances have been eliminated.
 
 Unaudited Interim Financial Data
 
  The unaudited financial statement data as of March 31, 1998 and for the
three months ended March 31, 1997 and 1998 has been prepared on the same basis
as the audited consolidated financial statements and, in the opinion of
management, include all adjustments (consisting of only normal recurring
adjustments) necessary to present fairly the financial information set forth
therein, in accordance with generally accepted accounting principles.
 
 Use of Estimates in the Preparation of Financial Statements
 
  The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosures of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
 
 Revenue Recognition and Product Warranty
 
  The Company's revenues are derived from the sale and license of its products
and to a lesser extent, from fees associated with training and technical
support offered to its customers. Product revenues consist of revenues from
hardware sales and software licensing arrangements. Revenues from software
licensing arrangements have not been significant to date. Service revenues
consist of product support (including software post-contract support services)
and training.
 
                                      F-7
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  Revenue from hardware sales are recognized upon shipment to the customer.
Estimated reserves for warranty costs as well as reserves for sales returns
and allowances related to anticipated return of products sold to distributors
with limited rights of return, which are not material to the consolidated
financial statements, are recorded at the time of sale. Revenue from software
sales, including sales to distributors, are recognized upon shipment of the
software if there are no significant post-delivery obligations and if
collection is probable. The Company generally has not had any significant
post-delivery obligations associated with the sale of its products. Service
revenue is recognized as the training services are performed, or ratably over
the term of the support period.
 
  During 1990, the Company entered into separate licensing agreements with
Motorola, Inc. ("Motorola") and one other major semiconductor company which
expire in December 1999 and January 2000, respectively, unless renewed.
Motorola and the other major semiconductor company have the right to terminate
the agreement at any time. Motorola is a significant stockholder and is also a
related party to the Company due to its representation on the Company's Board
of Directors during 1995, 1996 and part of 1997. The agreements provide, among
other things, for the worldwide right to manufacture and distribute products
subject to the licensed technology and requires the Company to provide support
and unspecified updates to the licensed technology over the terms of the
agreements, including support relating to compatibility testing and
qualification of updates to the licensed technology. The agreements also
provide for nonrefundable advance royalty payments aggregating $6,750,000,
which were received by the Company in 1990 and 1991. These payments are being
recognized as revenue ratably over the ten-year royalty period due to the
ongoing obligation to provide support and unspecified updates to the licensed
technology. As of December 31, 1997, the Company has deferred $2,025,000 (of
which $1,350,000 is classified as a long-term liability) of royalty payments
that will be recognized in future periods. Any additional royalties that are
reported by Motorola or the other company are recognized as revenue upon
receipt of such royalties by the Company. Product revenues for the years ended
December 31, 1995, 1996 and 1997 each include $675,000 related to these
advance royalty payments. For the years ended December 31, 1995, 1996 and
1997, Motorola accounted for approximately $595,000, $845,000 and $360,000 of
total revenues, respectively.
 
 Cash and Cash Equivalents
 
  The Company considers bank deposits, money market investments and U.S.
government securities with an original maturity of three months or less as
cash and cash equivalents.
 
 Short-Term Investments
 
  At December 31, 1997, short-term investments consist of U.S. government
securities with original maturities of approximately five months. These short-
term investments are classified as held-to-maturity and valued using the
amortized cost method, which approximated the fair market value.
 
 Inventories
 
  Inventories are stated at the lower of cost (first-in, first-out) or market
and include material, labor and manufacturing overhead. Inventories consist of
the following (in thousands):
 
<TABLE>
<CAPTION>
                                                       DECEMBER 31,
                                                       -------------  MARCH 31,
                                                        1996   1997     1998
                                                       ------ ------ -----------
                                                                     (UNAUDITED)
   <S>                                                 <C>    <C>    <C>
   Purchased materials................................ $1,079 $1,791   $2,286
   Work-in-process....................................    129    130      133
   Finished goods.....................................    384    523      757
                                                       ------ ------   ------
                                                       $1,592 $2,444   $3,176
                                                       ====== ======   ======
</TABLE>
 
                                      F-8
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
 Property and Equipment
 
  Property and equipment are stated at cost. Depreciation is provided using
the straight-line method over the estimated useful lives of two to five years
for computer and other equipment and furniture and fixtures. Leasehold
improvements are amortized over the shorter of the remaining lease term or the
estimated useful life of the improvements using the straight-line method.
 
 Software Development Costs
 
  The Company capitalizes eligible computer software development costs upon
the establishment of technological feasibility, which the Company has defined
as completion of a working model. For the years ended December 31, 1995, 1996
and 1997, and for the three months ended March 31, 1997 and 1998, costs that
were eligible for capitalization were insignificant and, thus, the Company has
charged all software development costs to product development expense in the
accompanying consolidated statements of operations.
 
 Foreign Currency Translation
 
  The functional currency of the Company's subsidiaries is the local currency.
Accordingly, all assets and liabilities are translated into U.S. dollars at
the current exchange rate as of the applicable balance sheet date. Revenues
and expenses are translated at the average exchange rate prevailing during the
period. Gains and losses resulting from the translation of the financial
statements are reported as a separate component of stockholders' equity.
 
 Concentrations of Credit Risk
 
  Financial instruments which potentially subject the Company to
concentrations of credit risk consist principally of temporary cash
investments and trade receivables. The Company has cash investment policies
that limit the amount of credit exposure to any one financial institution and
restrict placement of these investments to financial institutions evaluated as
highly creditworthy. Concentrations of credit risk with respect to trade
receivables are limited due to the large number of customers comprising the
Company's customer base and their dispersion across many different industries
and geographies. With respect to trade receivables, the Company performs
ongoing credit evaluations of its customers' financial condition.
Additionally, the Company establishes an allowance for doubtful accounts based
upon factors surrounding the credit risk of specific customers, historical
trends and other available information.
 
 Computation of Basic Net Loss Per Share and Pro Forma Basic Net Loss Per
Share
 
  Historical net loss per share has been calculated under Statement of
Financial Accounting Standards (SFAS) No. 128, "Earnings per Share." SFAS No.
128 requires companies to compute earnings per share under two different
methods (basic and diluted). Basic net loss per share is calculated by
dividing net loss by the weighted average shares of common stock outstanding
during the period. No diluted loss per share information has been presented in
the accompanying consolidated statements of operations since potential common
shares from the conversion of preferred stock, stock options and warrants are
antidilutive. The Company evaluated the requirements of the Securities and
Exchange Commission Staff Accounting Bulletin No. 98 ("SAB 98"), and concluded
that there are no nominal issuances of common stock or potential common stock
which would be required to be shown as outstanding for all periods as outlined
in SAB 98.
 
  Pro forma basic net loss per share has been calculated assuming the
conversion of the outstanding preferred stock into an equivalent number of
shares of common stock, as if the shares had been converted on the dates of
their issuance.
 
                                      F-9
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
 New Pronouncements
 
  In June 1997, the Financial Accounting Standards Board issued SFAS No. 130,
"Reporting Comprehensive Income," which establishes standards for reporting
and presentation of comprehensive income. SFAS No. 130, which was adopted by
the Company in the first quarter of 1998, requires companies to report a new
measurement of income. "Comprehensive Income (Loss)" is to include foreign
currency translation gains and losses and other unrealized gains and losses
that have historically been excluded from net income (loss) and reflected
instead in equity. The following table reconciles comprehensive net loss under
the provisions of SFAS No. 130 for the years ended December 31, 1995, 1996 and
1997 and for the three months ended March 31, 1997 and 1998 (in thousands):
 
<TABLE>
<CAPTION>
                                       DECEMBER 31,             MARCH 31,
                                 --------------------------  ----------------
                                  1995      1996     1997     1997     1998
                                 -------  --------  -------  -------  -------
                                                               (UNAUDITED)
   <S>                           <C>      <C>       <C>      <C>      <C>
   Net loss..................... $(8,713) $(10,716) $(8,214) $(1,907) $(1,737)
   Foreign currency translation
    adjustments.................     (62)      (35)    (320)    (201)     (64)
                                 -------  --------  -------  -------  -------
   Comprehensive net loss....... $(8,775) $(10,751) $(8,534) $(2,108) $(1,801)
                                 =======  ========  =======  =======  =======
</TABLE>
 
  In June 1997, the Financial Accounting Standards Board issued SFAS No. 131,
"Disclosures About Segments of an Enterprise and Related Information," which
establishes standards for disclosure of segment information and which will be
adopted by the Company in the fourth quarter of 1998. The Company anticipates
that SFAS No. 131 will not have a material impact on its financial statements.
 
  In December 1997, the American Institute of Certified Public Accountants
("AICPA") issued Statement of Position ("SOP") 97-2 which superseded SOP 91-1,
"Software Revenue Recognition." SOP 97-2 is effective for transactions entered
into in the Company's fiscal year beginning January 1, 1998. Management has
assessed this new statement and the adoption in the first quarter of fiscal
1998 did not have a material effect on the Company's financial statements or
on the timing of the Company's revenue recognition, or cause changes to its
revenue recognition policies.
 
  In April 1998, the AICPA issued SOP 98-5 "Reporting the Costs of Start-up
Activities". SOP 98-5 is effective for the Company's fiscal year beginning
January 1, 1999. SOP 98-5 provides guidance on the financial reporting of
start-up costs and organization costs and requires such costs to be expensed
as incurred. Management believes the adoption of SOP 98-5 will not have a
material effect on the Company's financial statements.
 
3. COMMITMENTS:
 
  The Company leases its facilities under operating leases which expire on
various dates through 2002. As of December 31, 1997, future minimum lease
payments under such agreements were as follows (in thousands):
 
<TABLE>
            <S>                                    <C>
            1998.................................. $1,579
            1999..................................  1,593
            2000..................................    804
            2001..................................     35
            2002..................................     35
                                                   ------
                                                   $4,046
                                                   ======
</TABLE>
 
  Rent expense for the years ended December 31, 1995, 1996 and 1997 was
approximately $1,645,000, $1,768,000 and $1,818,000, respectively. Certain
lease agreements provide for escalating rent payments over the
 
                                     F-10
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
term of the lease. Rent expense under these agreements is recognized on a
straight-line basis. As of December 31, 1996 and 1997, the Company has accrued
approximately $440,000 and $383,000, respectively, of deferred rent related to
these agreements of which $63,000 and $137,000 is included in accrued
liabilities as of December 31, 1996 and 1997, respectively, in the
accompanying consolidated balance sheets.
 
4. MAJOR CUSTOMER AND GEOGRAPHIC AREA:
 
  In 1996, no single customer accounted for 10% or more of total revenues. In
1995, 1997 and the three months ended March 31, 1998, one customer, who is
also a distributor of the Company's products, accounted for 12.0%, 10.9% and
20.6% of total revenues, respectively. For the three months ended March 31,
1997, no single customer accounted for 10% or more of total revenues.
 
  The Company operates in the control network industry segment. The Company's
operations by geographic area were as follows (in thousands):
 
<TABLE>
<CAPTION>
                                        DECEMBER 31,             MARCH 31,
                                  --------------------------  ----------------
                                   1995      1996     1997     1997     1998
                                  -------  --------  -------  -------  -------
                                                                (UNAUDITED)
   <S>                            <C>      <C>       <C>      <C>      <C>
   Revenues from customers:
    United States...............  $20,323  $ 21,445  $25,610  $ 6,805  $ 7,244
    Japan.......................    3,020     2,545    2,692      669      715
                                  -------  --------  -------  -------  -------
     Total......................  $23,343  $ 23,990  $28,302  $ 7,474  $ 7,959
                                  =======  ========  =======  =======  =======
   Intercompany revenues between
    geographic areas:
    United States...............  $ 1,405  $  2,085  $ 2,455  $   741  $   693
    Japan.......................      --        --       --       --       --
    Europe and Other............    3,257     4,025    4,523    1,024    1,031
    Eliminations................   (4,662)   (6,110)  (6,978)  (1,765)  (1,724)
                                  -------  --------  -------  -------  -------
     Total......................  $   --   $    --   $   --   $   --   $   --
                                  =======  ========  =======  =======  =======
   Income (loss) from
    operations:
    United States...............  $(6,974) $ (6,414) $(3,413) $  (777) $  (642)
    Japan.......................      118      (854)  (1,084)    (158)    (174)
    Europe and Other............      250       380      350       75       83
    Eliminations................   (3,248)   (4,049)  (4,375)  (1,084)  (1,024)
                                  -------  --------  -------  -------  -------
     Total......................  $(9,854) $(10,937) $(8,522) $(1,944) $(1,757)
                                  =======  ========  =======  =======  =======
   Identifiable assets:
    United States...............  $22,741  $ 13,789  $14,203           $13,044
    Japan.......................    1,264     1,191    1,800             1,886
    Europe and Other............      542       875      813               765
                                  -------  --------  -------           -------
     Total......................  $24,547  $ 15,855  $16,816           $15,695
                                  =======  ========  =======           =======
</TABLE>
 
  Revenues from export sales (primarily to Europe) accounted for approximately
39.1%, 43.0%, 48.0%, 45.7% and 48.0% of total revenues for the years ended
December 31, 1995, 1996 and 1997 and for the three months ended March 31, 1997
and 1998, respectively.
 
                                     F-11
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  The Company's operations are structured to achieve consolidated objectives.
As a result, significant interdependencies and overlaps exist among the
Company's operating units. Accordingly, the revenues from customers, income
(loss) from operations and identifiable assets shown for each geographic area
may not be indicative of the amounts that would have been reported if the
operating units were independent of one another.
 
  Intercompany sales and transfers of manufacturing materials and finished
goods between areas are accounted for based on established intercompany sales
prices.
 
5. PREFERRED STOCK:
 
  Preferred stock outstanding consists of the following (in thousands, except
share amounts):
 
<TABLE>
<CAPTION>
                                        DECEMBER 31,
                              ---------------------------------    MARCH 31,
                                    1996             1997             1998
                              ---------------- ---------------- ----------------
                                    ADDITIONAL       ADDITIONAL       ADDITIONAL
                               PAR   PAID-IN    PAR   PAID-IN    PAR   PAID-IN
                              VALUE  CAPITAL   VALUE  CAPITAL   VALUE  CAPITAL
                              ----- ---------- ----- ---------- ----- ----------
                                                                  (UNAUDITED)
<S>                           <C>   <C>        <C>   <C>        <C>   <C>
Series B, 1,250,000 shares
 authorized, 1,250,000
 shares outstanding in 1996,
 1997 and 1998, liquidation
 preference of $7,500.......   $13   $ 7,463    $13   $ 7,463    $13   $ 7,463
Series C, 1,608,000 shares
 authorized, 1,608,000
 shares outstanding in 1996,
 1997 and 1998, liquidation
 preference of $12,500......    16    12,483     16    12,483     16    12,483
Series D, 3,172,000 shares
 authorized, 3,029,381
 shares outstanding in 1996,
 1997 and 1998, liquidation
 preference of $30,294......    30    30,234     30    30,234     30    30,234
Series E, 2,400,000 shares
 authorized, no shares
 outstanding
 in 1996, 2,000,000 shares
 outstanding in 1997 and
 1998, liquidation
 preference of $10,000......   --        --      20     9,900     20     9,900
                               ---   -------    ---   -------    ---   -------
 Total......................   $59   $50,180    $79   $60,080    $79   $60,080
                               ===   =======    ===   =======    ===   =======
</TABLE>
 
  In February 1992, the Company completed a stock purchase agreement with
Motorola whereby it sold 1,250,000 shares of its authorized Series B preferred
stock at $6.00 per share for total gross proceeds of $7,500,000 to the
Company. In January 1993, the Company completed a stock purchase agreement
with Motorola whereby it sold 1,608,000 shares of its authorized Series C
preferred stock at $7.77 per share for total gross proceeds of $12,500,000 to
the Company. In 1994, the Company completed a stock purchase agreement with
Motorola and two new investors whereby it sold 1,000,000 shares of its
authorized Series D preferred stock at $10.00 per share to each investor for
total gross proceeds of $30,000,000 to the Company. In May 1997, the Company
completed a stock purchase agreement with existing shareholders whereby it
sold 2,000,000 shares of its authorized Series E preferred stock at $5.00 per
share for total gross proceeds of $10,000,000 to the Company. Motorola is a
party to certain licensing agreements discussed in Note 2.
 
  In connection with the issuance of the Series D preferred stock to Motorola
in 1994, Motorola was granted the right to purchase additional shares of
Series D preferred stock in order to maintain its ownership percentage (the
"Motorola Purchase Right"). The Motorola Purchase Right expires upon the
closing of an underwritten public offering of the common stock which results
in gross proceeds to the Company of not less than $15,000,000. The exercise
price of the stock purchase right is the last sales price per share of
preferred stock sold by the Company. During 1995, Motorola purchased 29,381
shares of Series D preferred stock at $10.00 per share under this agreement.
During 1996 and 1997, Motorola did not purchase any shares of preferred stock
under this agreement. As of December 31, 1997, Motorola had the right to
purchase approximately 49,000 additional shares of Series D preferred stock
under this agreement which expired in February 1998.
 
                                     F-12
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  The rights and preferences of the Series B, C, D and E convertible preferred
stock are as follows:
 
    (A) Each holder of Series B, C, D and E convertible preferred stock is
  entitled to receive noncumulative dividends at a rate of $0.48, $0.622,
  $0.80 and $0.40 per share, respectively, per annum, when and as declared by
  the Board of Directors, prior to payment of dividends on common stock. To
  date, no dividends have been declared by the Board of Directors for the
  preferred stock.
 
    (B) Each share of Series B, C, D and E preferred stock is convertible at
  the option of the holder, at any time after the issuance of such share,
  into such number of fully paid and nonassessable shares of common stock as
  is determined by the conversion rate. The initial conversion rate shall be
  one for one and is subject to adjustment upon the occurrence of specific
  events. The preferred shares automatically convert into shares of common
  stock upon the earlier of (1) the affirmative vote of the holders of a
  majority of the Series B, C, D and E preferred stock to cause all
  outstanding shares of Series B, C, D and E preferred stock to be converted;
  or (2) the closing of an underwritten public offering of the common stock
  which results in gross proceeds to the Company of not less than
  $15,000,000.
 
    (C) In the event of any liquidation, dissolution or winding up of the
  Company, either voluntary or involuntary, the holders of the Series B, C, D
  and E preferred stock shall be entitled to receive $6.00, $7.7736, $10.00
  and $5.00 per share, respectively, plus any declared but unpaid dividends,
  prior to any distribution to the holders of common stock.
 
    (D) The holder of each share of Series B, C, D and E preferred stock is
  entitled to vote in an amount equivalent to the number of shares of common
  stock into which the preferred stock could be converted.
 
    (E) Without the approval of a majority of the holders of the outstanding
  shares of Series B, C, D and E preferred stock, the Company cannot, among
  other things, materially alter or change the powers, preferences or special
  rights of the Series B, C, D and E preferred stock so as to affect them
  adversely.
 
6. COMMON STOCK:
 
  The Company sold 975,000, 1,005,000 and 5,000 shares of common stock during
1995, 1996 and 1997, respectively, at the fair value, as determined by the
Board of Directors, of $1.00 per share to $1.29 per share during 1995, $1.29
per share to $1.40 per share during 1996 and $1.40 per share during 1997 under
stock purchase agreements, primarily to certain officers of the Company. The
stock purchased under these agreements vests annually over four years. As of
December 31, 1997, 1,322,500 shares of common stock issued and outstanding
under these stock purchase agreements and previous stock purchase agreements
were unvested and subject to repurchase by the Company, at the Company's
discretion, at prices ranging from $0.77 to $1.40 per share and a weighted
average price of $1.26 per share.
 
 Warrants
 
  In connection with the issuance of the Series D preferred stock in 1994, the
Company granted certain investment bankers warrants to purchase 30,000 shares
of the Company's common stock at $12.00 per share (the "Common Stock
Warrants"). The Common Stock Warrants expire upon the earlier of (i) February
2, 1999 or (ii) the consummation of any transaction resulting in the sale,
transfer or disposition of all or substantially all of the Company's assets or
the merger of the Company with or into, or consolidation with, any other
corporation, whereby the holders of the Company's voting securities prior to
the transaction do not hold more than 50% of the voting securities of the
surviving entity following consummation of the transaction ("Change in
Control"). At December 31, 1997, these Common Stock Warrants were exercisable
but no warrants had been exercised.
 
  In addition, in connection with the issuance of the Series E preferred stock
in 1997, warrants to purchase an aggregate of 400,000 shares of Series E
preferred stock (or common stock, if all Series E preferred stock has
 
                                     F-13
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
then been converted into common stock) at a per share exercise price of $5.00
were issued (the "Series E Warrants" and together with the Common Stock
Warrants, the "Warrants"). The Series E Warrants are exercisable at any time
until their expiration on the earlier of May 15, 2002 or a Change in Control.
 Each Warrant contains a cashless conversion right that allows the holder to
receive a number of shares of the Company's common stock or Series E preferred
stock, as applicable, equal to the quotient obtained by dividing the value of
the Warrant on the date of exercise, which value is determined by subtracting
(i) the aggregate exercise price of the Warrant from (ii) the aggregate fair
market value of the Warrant shares on the date of exercise, by the fair market
value of one share of the Company's Common Stock or Series E Preferred Stock,
as applicable, on the date of exercise, as determined by the Company's Board
of Directors. At December 31, 1997, these Series E Warrants are exercisable
but no warrants had been exercised.
 
  At the date of issuance, the fair market value of these Warrants was deemed
to be immaterial.
 
 1988 Stock Option Plan
 
  During 1988, the Company adopted the 1988 Stock Option Plan (the "1988
Plan") for key employees, officers and directors. The Company has reserved
8,900,000 shares under the 1988 Plan. Incentive stock options to purchase
shares of common stock may be granted at not less than 100% of the fair market
value, as determined by the Board of Directors, and generally have a term of
five years from the date of grant, not to exceed ten years. The 1988 Plan also
provides for holders of non-qualified stock options to purchase shares at not
less than 85% of the fair market value, as determined by the Board of
Directors. Options generally vest ratably over four years.
 
  The 1988 Plan also allows for the issuance of options which are immediately
exercisable through execution of a restricted stock purchase agreement. Shares
purchased pursuant to a stock purchase agreement generally vest over four
years. In the event of termination of employment, the Company, at its
discretion, may repurchase unvested shares at a price equal to the original
issue price. Options granted under the 1988 Plan will remain outstanding in
accordance with their original terms. However, effective April 1997, the Board
of Directors determined that no further options will be granted under the 1988
Plan.
 
 1997 Stock Plan
 
  During 1997, the Company adopted the 1997 Stock Plan (the "1997 Plan") for
key employees, officers and directors. The Company has reserved 5,000,000
shares under the 1997 Plan. In February 1998, the Board of Directors
authorized an increase in the number of shares reserved for issuance under the
1997 Plan to 6,200,000 shares. Incentive stock options to purchase shares of
common stock may be granted at not less than 100% of the fair market value, as
determined by the Board of Directors, and generally have a term of five years
from the date of grant, not to exceed ten years. The 1997 Plan also provides
for holders of non-qualified stock options to purchase shares at not less than
85% of the fair market value, as determined by the Board of Directors. Options
generally vest ratably over four years.
 
  The 1997 Plan also allows for the issuance of options which are immediately
exercisable through execution of a restricted stock purchase agreement. Shares
purchased pursuant to a stock purchase agreement generally vest annually over
four years. In the event of termination of employment, the Company, at its
discretion, may repurchase unvested shares at a price equal to the original
issuance price. As of December 31, 1997, no shares of common stock were issued
and outstanding under these restricted stock purchase agreements.
 
 
                                     F-14
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
  Stock option activity under the 1988 and 1997 Plans is summarized below:
 
<TABLE>
<CAPTION>
                                            WEIGHTED
                               NUMBER       AVERAGE
                             OF OPTIONS  EXERCISE PRICE
                             ----------  --------------
   <S>                       <C>         <C>
   Options outstanding,
    December 31, 1994.......  2,227,000      $0.57
    Grants..................    943,800       1.11
    Cancellations...........   (104,551)      0.80
    Exercises............... (1,072,373)      0.53
                             ----------      -----
   Options outstanding,
    December 31, 1995.......  1,993,876       0.84
    Grants..................  1,618,700       1.38
    Cancellations...........   (130,938)      1.07
    Exercises...............   (630,124)      0.83
                             ----------      -----
   Options outstanding,
    December 31, 1996.......  2,851,514       1.14
    Grants..................  2,185,700       1.40
    Cancellations...........   (366,626)      1.29
    Exercises...............   (354,156)      0.83
                             ----------      -----
   Options outstanding,
    December 31, 1997.......  4,316,432       1.28
    Grants..................    215,250       2.00
    Cancellations...........    (43,938)      1.24
    Exercises...............   (405,049)      1.16
                             ----------      -----
   Options outstanding,
    March 31, 1998
    (unaudited).............  4,082,695      $1.33
                             ==========      =====
   Exercisable at December
    31, 1996................  2,851,514      $1.14
                             ==========      =====
   Exercisable at December
    31, 1997................  4,316,432      $1.28
                             ==========      =====
   Exercisable at March 31,
    1998 (unaudited)........  3,932,695      $1.31
                             ==========      =====
</TABLE>
 
  The following table summarizes the stock options outstanding as of December
31, 1997:
 
<TABLE>
<CAPTION>
                OPTIONS OUTSTANDING                   OPTIONS EXERCISABLE 
   -------------------------------------------------  ---------------------
                                 WEIGHTED                                  
                     NUMBER       AVERAGE   WEIGHTED     NUMBER    WEIGHTED
                 OUTSTANDING AT  REMAINING  AVERAGE   EXERCISABLE  AVERAGE 
    EXERCISE      DECEMBER 31,   LIFE (IN   EXERCISE  DECEMBER 31, EXERCISE
   PRICE RANGE        1997        YEARS)     PRICE        1997      PRICE  
   -----------   --------------  ---------  --------  ------------ --------
   <S>           <C>             <C>        <C>       <C>          <C>     
      $0.15           25,500        1.7      $0.15        25,500    $0.15  
    0.60-0.77        431,189        1.2       0.72       431,189     0.72  
    0.97-1.40      3,859,743        3.8       1.35     3,859,743     1.35  
                   ---------        ---      -----     ---------    -----  
    0.15-1.40      4,316,432        3.5      $1.28     4,316,432    $1.28  
                   =========        ===      =====     =========    =====   
</TABLE>                          
 
  Certain options issued under the 1988 and 1997 Plans may be exercised any
time prior to their expiration. In addition, the Company has the right, upon
termination of an optionholder's employment or service with the Company, at
its discretion, to repurchase any unvested shares issued under the 1988 and
1997 Plans at the original purchase price. As of December 31, 1997 and March
31, 1998, 220,938 and 479,938 shares, respectively, were subject to repurchase
by the Company at prices ranging from $0.77 to $1.40 per share and a weighted
average repurchase price of $1.12 and $1.27, respectively. Of the 4,316,432
options exercisable at December 31, 1997, 871,290 were vested, and of the
3,932,695 options exercisable at March 31, 1998, 764,915 were vested.
 
 
                                     F-15
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  In connection with the issuance of stock options to employees during the
three months ended March 31, 1998, the Company has recorded deferred
compensation in the aggregate amount of approximately $530,000, representing
the difference between the deemed fair value of the Company's common stock and
the exercise price of the stock options at the date of grant. The Company is
amortizing the deferred compensation expense over the shorter of the period in
which the employee provides services or the applicable vesting period, which
is typically 48 months. For the three-month period ended March 31, 1998,
amortization expense was approximately $11,000. Deferred compensation is
decreased in the period of forfeiture arising from the early termination of an
option holder's services. No compensation expense related to any other periods
presented has been recorded.
 
  The Company accounts for the Plans under APB Opinion No. 25, "Accounting for
Stock Issued to Employees." Had compensation expense for the Plans been
determined consistent with SFAS No. 123, "Accounting for Stock-Based
Compensation," the Company's net loss and basic net loss per share would have
been increased to the following pro forma amounts (in thousands, except per
share amounts):
 
<TABLE>
<CAPTION>
                                                    YEARS ENDED DECEMBER 31,
                                                    --------------------------
                                                     1995      1996     1997
                                                    -------  --------  -------
   <S>                                              <C>      <C>       <C>
   Net loss:
    As reported.................................... $(8,713) $(10,716) $(8,214)
    Pro forma......................................  (8,789)  (10,992)  (8,626)
   Basic net loss per share:
    As reported.................................... $ (0.56) $  (0.62) $ (0.44)
    Pro forma......................................   (0.56)    (0.63)   (0.46)
</TABLE>
 
  The weighted-average grant date fair value of options granted during 1995,
1996 and 1997 was $0.08, $0.17 and $0.19, respectively. The fair value of each
option grant is estimated on the date of grant using the minimum value method
and the Black-Scholes option pricing model with the following weighted average
assumptions used for grants in 1995, 1996 and 1997: risk-free interest rates
of 5.95%, 6.10% and 5.60%, respectively; expected dividend yields of zero
percent; expected lives of 4 years. Because the Company has been a non-public
entity, it has omitted expected volatility in determining a value for its
options.
 
 Shares Reserved
 
  At December 31, 1997, the Company has reserved shares of its common stock as
follows:
 
<TABLE>
   <S>                                                                <C>
   Conversion of convertible preferred stock.........................  7,887,381
   Exercise and future issuance of stock options.....................  7,265,382
   Warrants..........................................................    430,000
   Series D purchase right-Motorola..................................     49,000
                                                                      ----------
                                                                      15,631,763
                                                                      ==========
</TABLE>
 
                                     F-16
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
7. INCOME TAXES:
 
  The Company accounts for income taxes using SFAS No. 109, "Accounting for
Income Taxes". SFAS No. 109 provides for an asset and liability approach under
which deferred income taxes are based upon enacted tax laws and rates
applicable to the periods in which the taxes become payable.
 
  Income taxes for the years ended December 31, 1995, 1996 and 1997 primarily
consist of taxes related to foreign subsidiaries.
 
  The components of the net deferred income tax asset as of December 31, 1996
and 1997 are as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                               1996      1997
                                                             --------  --------
   <S>                                                       <C>       <C>
   Net operating loss carryforwards......................... $ 23,986  $ 26,315
   Deferred revenue.........................................    1,084       940
   Tax credit carryforwards.................................    3,051     3,537
   Capitalized research and development costs...............    1,469     1,852
   Reserves and other cumulative temporary differences......    1,104       906
                                                             --------  --------
                                                               30,694    33,550
   Valuation allowance......................................  (30,694)  (33,550)
                                                             --------  --------
   Net deferred income tax asset............................ $    --   $    --
                                                             ========  ========
</TABLE>
 
  As of December 31, 1997, the Company had net operating loss carryforwards
for Federal and state income tax reporting purposes of approximately $76.0
million and $5.0 million, respectively, which expire at various dates through
2012. In addition, as of December 31, 1997, the Company had tax credit
carryforwards of approximately $3.5 million, which expire at various dates
through 2012. The Internal Revenue Code of 1986, as amended, contains
provisions that may limit the net operating loss and credit carryforwards
available for use in any given period upon the occurrence of certain events,
including a significant change in ownership interests.
 
  A valuation allowance has been recorded for the entire deferred tax asset as
a result of uncertainties regarding the realization of the asset balance due
to the history of losses and the variability of operating results. As of
December 31, 1996 and 1997, the Company had no significant deferred tax
liabilities.
 
8. SUBSEQUENT EVENTS (UNAUDITED):
 
 Pro Forma Stockholders' Equity
 
  In April 1998, the Board of Directors authorized the filing of a
registration statement with the Securities and Exchange Commission permitting
the Company to sell shares of its common stock in connection with the proposed
initial public offering ("IPO"). In addition, the Board of Directors
authorized the Company to amend its articles of incorporation, whereby the
Company will be authorized to issue 100,000,000 shares of common stock and
5,000,000 shares of preferred stock. If the offering is consummated under the
terms presently anticipated, all of the currently outstanding preferred stock
will automatically convert into 7,887,381 shares of common stock upon the
closing of the IPO. The effect of the above has been reflected in the
accompanying unaudited pro forma stockholders' equity as of March 31, 1998.
 
 1998 Directors Option Plan
 
  Non-employee directors are entitled to participate in the 1998 Director
Option Plan (the "Director Plan"). The Director Plan was adopted by the Board
of Directors in May 1998, is subject to stockholder approval and will not
become effective until the date of this offering. The Director Plan has a term
of ten years, unless terminated sooner by the Board. A total of 300,000 shares
of Common Stock have been reserved for issuance under the Director Plan, plus
an increase each year equal to 100,000 shares or such lesser amount as the
Board may determine.
 
                                     F-17
<PAGE>
 
                              ECHELON CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONCLUDED)
 
 
  The Director Plan provides for the automatic grant of 25,000 shares of
common stock (the "First Option") to each non-employee director on the date he
or she first becomes a director (provided that such person joins the Board
after May 29, 1998). Each non-employee director shall also automatically be
granted an option to purchase 10,000 shares (a "Subsequent Option") on both
the effective date of this offering and on the date of the Company's Annual
Stockholder Meeting provided that he or she is re-elected to the Board or
otherwise remains on the Board, if on such date he or shall have served on the
Board for at least the preceding six months. Each First Option and each
Subsequent Option shall have a term of five years and the shares subject to
the option shall vest as to 25% of the shares subject to option on each
anniversary of the date of grant. The exercise price of each First Option and
Subsequent Option shall be 100% of the fair market value per share of the
common stock, generally determined with reference to the closing price of the
common stock as reported on the Nasdaq National Market on the date of grant.
On the effective date of this offering options to purchase an aggregate of
60,000 shares will be granted under the Director Plan, with an exercise price
equal to the initial public offering price per share.
 
  In the event of a merger of the Company with or into another corporation or
the sale of substantially all of the assets of the Company, each option shall
be assumed or an equivalent option may be substituted by the successor
corporation. Following such assumption or substitution, if the optionee's
status as a director of the successor corporation terminates other than upon a
voluntary resignation by the optionee, the option shall become fully
exercisable, including as to shares as to which it would not otherwise be
exercisable. If the outstanding options are not assumed or substituted, the
options shall become fully vested and exercisable. Options granted under the
Director Plan must be exercised within three months of the end of the
optionee's tenure as a director of the Company, or within twelve months after
such director's termination by death or disability, but in no event later than
the expiration of the option's five year term; provided, however, that shares
subject to an option granted to a director who has served as a director with
the Company for at least five years shall become fully vested and exercisable
for the remainder of the option's five year term upon such director's
termination. No option granted under the Director Plan is transferable by the
optionee other than by will or the laws of descent and distribution, and each
option is exercisable, during the lifetime of the optionee, only by such
optionee.
 
 Bank Revolving Line of Credit Agreement
 
  In May 1998, the Company entered into a revolving line of credit agreement
with a bank, whereby the Company may borrow up to 85% of eligible accounts
receivable, not to exceed $5.0 million. If the credit agreement had been in
place as of April 30, 1998, the amount available to be borrowed would have
been $2.6 million. Advances under the credit agreement bear interest at the
bank's reference rate or, at the option of the Company, at a fixed rate of
interest equal to the London interbank offered rate plus 150 basis points. As
of May 31, 1998, there was approximately $65,000 outstanding under this line
of credit in the form of a letter of credit. The credit agreement, which
expires in May 1999, contains certain negative covenants restricting the
Company's ability to pay dividends or enter into certain financial
transactions. The credit agreement also contains a minimum tangible net worth
requirement, determined on a quarterly basis.
 
                                     F-18
<PAGE>
 
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  No dealer, sales representative, or any other person has been authorized to
give any information or to make any representations in connection with this of-
fering other than those contained in this Prospectus, and, if given or made,
such information or representations must not be relied upon as having been au-
thorized by the Company or any of the Underwriters. This Prospectus does not
constitute an offer to sell or a solicitation of an offer to buy any securities
other than the Common Stock to which it relates or an offer to, or a solicita-
tion of, any person in any jurisdiction where such an offer or solicitation
would be unlawful. Neither the delivery of this Prospectus nor any sale made
hereunder shall, under any circumstances, create any implication that there has
been no change in the affairs of the Company since the date hereof or that the
information contained herein is correct as of any time subsequent to the date
hereof.
 
                          --------------------------
                               TABLE OF CONTENTS
                          --------------------------
 
<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
<S>                                                                       <C>
Prospectus Summary.......................................................   3
Risk Factors.............................................................   5
Use of Proceeds..........................................................  16
Dividend Policy..........................................................  16
Capitalization...........................................................  17
Dilution.................................................................  18
Selected Consolidated Financial Data.....................................  19
Management's Discussion and Analysis of Financial Condition and Results
 of Operations...........................................................  20
Business.................................................................  29
Management...............................................................  40
Certain Transactions.....................................................  49
Principal Stockholders...................................................  51
Description of Capital Stock.............................................  54
Shares Eligible for Future Sale..........................................  57
Underwriting.............................................................  59
Legal Matters............................................................  61
Experts..................................................................  61
Additional Information...................................................  61
Index to Consolidated Financial Statements............................... F-1
</TABLE>
 
  Until August 21, 1998 (25 days after the date of this Prospectus), all deal-
ers effecting transactions in the Common Stock offered hereby, whether or not
participating in this distribution, may be required to deliver a Prospectus.
This is in addition to the obligation of dealers to deliver a Prospectus when
acting as Underwriters and with respect to their unsold allotments or
subscriptions.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                                5,000,000 SHARES
 
                             [LOGO OF ECHELON(R)]

                                  COMMON STOCK
 
                                ---------------
                                   PROSPECTUS
                                ---------------
 
                     NationsBanc Montgomery Securities LLC
 
                         BancAmerica Robertson Stephens
 
                          Volpe Brown Whelan & Company
 
                                 July 27, 1998
 
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