TRANSWITCH CORP /DE
10-K, 1998-03-31
SEMICONDUCTORS & RELATED DEVICES
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                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                                  FORM 10--K
 
[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE
    ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997
 
                                      OR
 
[_] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
    EXCHANGE ACT OF 1934
 
          FOR THE TRANSITION PERIOD FROM              TO
 
                        COMMISSION FILE NUMBER 0-25996
 
                            TRANSWITCH CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                         <C>
                 DELAWARE                                      06-1236189
         (STATE OF INCORPORATION)               (I.R.S. EMPLOYER IDENTIFICATION NUMBER)
</TABLE>
 
                            THREE ENTERPRISE DRIVE
                          SHELTON, CONNECTICUT 06484
                   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
 
                           TELEPHONE (203) 929-8810
 
  Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days.
                               Yes   X    No
 
  Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to
the best of Registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [_]
 
  The aggregate market value of the voting stock held by non-affiliates of the
Registrant, based upon the closing sale price of Common Stock on February 28,
1998, as reported on the Nasdaq National Market, was approximately
$127,681,803 Shares of Common Stock held by each executive officer and
director and by each person who to the Company's knowledge owns 5% or more of
the outstanding voting stock have been excluded in that such persons may be
deemed to be affiliates. This determination of affiliate status is not
necessarily a conclusive determination for other purposes.
 
  COMMON STOCK, PAR VALUE $.001 PER SHARE, OUTSTANDING AT FEBRUARY 28, 1998:
13,283,117
 
                      DOCUMENTS INCORPORATED BY REFERENCE
 
 Parts of the following document are incorporated by reference in Part III of
                            this Form 10-K Report:
(1) Proxy Statement for Registrant's 1998 Annual Meeting of Shareholders--
Items 10, 11, 12 and 13.
 
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<PAGE>
 
                                    PART I
 
ITEM 1. BUSINESS
 
GENERAL
 
  TranSwitch Corporation, a Delaware corporation established in April 1988
("TranSwitch" or the "Company"), designs, develops, markets and supports
highly integrated digital and mixed-signal semiconductor solutions for the
telecommunications and data communications markets. The Company's customers
are original equipment manufacturers (OEM's) who serve three communications
market segments: worldwide public network infrastructure, including cable
television (CATV), internet infrastructure and corporate wide area networks
(WAN).
 
  TranSwitch's VLSI devices are compliant with asynchronous (called PDH in
Europe), synchronous optical network (SONET, SDH in Europe) and asynchronous
transfer mode (ATM) data and telecommunications transmission standards and are
designed to transparently integrate these standards. The Company's mixed-
signal and digital design capability, in conjunction with its
telecommunications systems expertise, enables the Company to determine and
implement optimal combinations of design elements for desired analog and
digital functionality. The Company believes that this approach allows its
customers to achieve faster time-to-market and to introduce systems that offer
greater functionality, improved performance, lower power dissipation and
greater reliability relative to competing discrete solutions, while reducing
system size and cost.
 
  Statements in this Form 10-K which are not historical facts, so-called
"forward looking statements," are made pursuant to the safe harbor provisions
of Section 21 E of the Securities Exchange Act of 1934, as amended. Investors
are cautioned that all forward looking statements involve risks and
uncertainties, including those detailed in the Company's filings with the
Securities and Exchange Commission. See also "Item 7. Management's Discussion
and Analysis of Financial Condition and Results of Operations--Certain Factors
That May Affect Future Results."
 
PRODUCTS AND APPLICATIONS
 
  TranSwitch supplies high-speed (broadband) VLSI devices to systems vendors
of public network equipment, such as multiplexers and DACS (Digital Access
Cross-connect Systems); ISP's (Internet Service Providers) and CATV systems
equipment; and local area networks (LAN) and WAN equipment, such as routers,
bridges and hubs. The Company's core competencies as a systems innovation
leader include an in-depth understanding of relevant asynchronous/PDH,
SONET/SDH and ATM standards and associated nuances, the ability to design
complex mixed-signal high-speed VLSI devices, and the capability to verify the
design against customers' requirements and standards' requirements through
analysis, simulation and certification.
 
  The Company believes that its "chip-set" approach and broad product coverage
in all three product lines position it as a "one-stop source" for broadband
communications VLSI products. Systems vendors can mix and match TranSwitch's
VLSI devices to optimally configure a specific system. The Company's products
utilizing three technologies can be grouped synergistically, providing
seamless integration of asynchronous/PDH, SONET/SDH and ATM applications.
 
  The prices for the Company's products typically range from $15 to $300
depending on volume, complexity and functionality.
 
 Asynchronous/PDH Products
 
  TranSwitch's asynchronous products provide high bandwidth connections and
can be used to configure transmission products for use in the public network,
to ease the management burden of public networks and to enable CPE (Customer
Premises Equipment) products like hubs and routers LANs and WANs to access the
public network for communication with similar products in other locations.
 
                                       1
<PAGE>
 
  The Company's asynchronous VLSI products include devices that provide
physical interfaces for DS-series and E-series standards. This product line
also includes multiplexers, devices that combine multiple low speed lines to
form a higher speed line, and demultiplexers, which perform the reverse
function. In addition, the Company offers framers, devices that identify the
starting point of a defined bit stream, permitting a system to recognize other
bits.
 
 SONET/SDH Products
 
  In the SONET/SDH area, the Company offers devices that provide a direct
interface for fiber optic transmission in North America, Europe and the Far
East. The Company's "mappers" bridge the interconnection between SONET/SDH
equipment and asynchronous equipment, allowing DS-series and E-series
transmission lines to be connected with SONET/SDH lines. Asynchronous signals
can therefore be transported across the SONET/SDH network transparently.
 
  TranSwitch's SONET/SDH products are used in Add/Drop multiplexers (ADM),
DACS and other telecommunications and data communications equipment. The
SONET/SDH products also have applications in CPE products such as routers and
LAN-switches, as well as in microwave transmission products. CATV vendors are
now using optical fiber technology based on SONET/SDH standards to upgrade
their infrastructure and provide new value-added services.
 
ATM Products
 
  In the ATM area, TranSwitch offers devices that convert data communications
packets (such as those on LANs and WANs) into the cell format needed for
transmission on ATM networks, along with devices that provide ATM interfaces
to both asynchronous and SONET/SDH transmission links.
 
TECHNOLOGY
 
  The Company believes that one of its core competencies is the
telecommunications and data communications knowledge and expertise of its key
executives and its engineering organization. The group possesses substantial
telecommunications and data communications design experience, as well as
extensive knowledge of relevant standards. A key aspect of "know-how" includes
not only a thorough understanding of the actual written standards promulgated,
but also an awareness of and appreciation for the nuances associated with
these standards necessary for assuring that device designs are fully
compliant. The Company's telecommunications and data communications experience
and participation in the standards development and promulgation process
provide it with significant advantages in designing semiconductor devices
meeting the evolving needs of its customers.
 
  Complementing the Company's accumulated communications industry expertise is
its VLSI design competence. The Company's VLSI design staff has extensive
experience in designing analog and mixed-signal devices, which require a
sophisticated understanding of complex technology, as well as the specifics of
manufacturing processes and their resulting impact on device performance.
TranSwitch has also developed a large number of VLSI blocks that operate under
the demanding requirements of the telecommunications and data communications
industry. These blocks have been designed to be merged using standard
programming languages such as VHDL and M (a C-like language) to create new
devices that meet expanding customer requirements.
 
  TranSwitch has also developed a proprietary toolset called the "Test Bench,"
which facilitates on-time development of products and ensures that products
meet customer and standards requirements. TranSwitch has also developed a
large library of reusable portable cells. In addition to standard logic
functions, the cell library consists of a large number of analog cells such as
clock-recovery functions, phase-locked-loops, and equalizers. The library also
includes key asynchronous, SONET/SDH and ATM functions. The Company is
investing significant resources in developing an architecture which allows
increased programmability. Programmability provides accelerated time-to-market
by decoupling hardware and software verification. In addition,
 
                                       2
<PAGE>
 
programmability permits standards upgrades and fixes to be effected more
easily. Further, customers can have the flexibility to tailor their products
to their specific requirements.
 
SALES AND MARKETING
 
  TranSwitch's sales and marketing strategy is to focus on worldwide suppliers
of high-speed communications and communications-oriented equipment. These
customers are easily identifiable and include telecommunications, data
communications, CPE, computing, process control and defense equipment vendors.
The Company has established a direct sales force and a worldwide network of
independent distributors and sales representatives for marketing its products.
 
  TranSwitch's direct sales force, technical support personnel and key
engineers work together in teams to support key customers. TranSwitch has
located technical support capabilities in key geographical locations,
including Europe and the Far East. These field sales engineers and independent
distributors and sales representatives support the Company's customers.
TranSwitch maintains a technical support team at the Company's headquarters as
a backup to the field sales engineers.
 
  TranSwitch has established foreign distributors and sales representative
relationships in Australia, Benelux, Brazil, Canada, Finland, France, Germany,
Israel, Italy, Japan, Korea, People's Republic of China, Spain, Sweden,
Switzerland, Taiwan and the United Kingdom. The Company also sells its
products through a domestic distributor and a network of domestic sales
representatives. The Company has regional sales/technical support capabilities
in Boston, Ma., Sunnyvale, Ca., Morristown, N.J., Great Falls, Va., Brussels,
Belgium, and Taipei, Taiwan, as well as in its headquarters facility in
Shelton, Connecticut.
 
CUSTOMERS
 
  Since shipping its first product in 1990, the Company has sold its products
and services to over 300 customers. The Company's customers include: public
network systems suppliers that incorporate the Company's products into
telecommunications systems; LAN and WAN equipment suppliers; ISP's;
communications test and performance measurement equipment suppliers; and
government, university and private laboratories that use the Company's
products in advanced public network and LAN/WAN developments.
 
  In 1997, Insight Electronics, Inc. (a distributor selling to various end
users, none of which comprise more than 10% of the Company's total revenues)
and Tellabs Operations accounted for 41% and 16% of total revenues,
respectively. In 1996, ECI Telecom Ltd, Insight Electronics, Inc. and Tellabs
Operations, Inc. accounted for 22%, 16% and 14% of total revenues,
respectively. In 1995, Tellabs Operations, Inc. and Insight Electronics, Inc.
accounted for 17% and 16% of total revenues, respectively. No other customer
accounted for 10% or more of revenues during 1997, 1996, and 1995. Export
revenues represented 33%, 46%, and 38% of total revenues in 1997, 1996 and
1995, respectively. See "Note 12 of Notes to Consolidated Financial
Statements."
 
RESEARCH AND DEVELOPMENT
 
  The Company believes that the continued introduction of new products in its
target markets is essential to its growth. As of December 31, 1997, the
Company had 56 full-time employees engaged in research and development
efforts. The Company currently anticipates only slight increases in its
research and development staffing in 1998. Expenditures for research and
development in 1997, 1996 and 1995 were approximately $9.2 million, $8.9
million and $6.5 million, respectively.
 
  Currently, the Company's major development programs include new SONET/SDH
products, new ATM products and new Asynchronous/PDH products which are
targeted at end markets in the public network transmission structure, the
Internet infrastructure and the corporate wide area network (WAN).
 
 
                                       3
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PATENTS AND LICENSES
 
  The Company has 24 patents issued and seven patent applications pending in
the U.S. Of the 24 issued patents, one is co-owned by ECI Telecom Ltd and one
is co-owned by Siemens Telecommunications Systems Ltd.. The Company has three
patents issued and 15 patent applications pending in Canada. The Company has
six patents issued in Taiwan, with one patent being co-owned by Siemens
Telecommunications Systems Ltd. The Company has three patents issued and four
patents pending in the People's Republic of China. The Company has 14 patent
applications pending in selected countries in the European Patent Office
(EPO), and one patent issued in France, Germany, and the U.K. In addition, the
Company has seven patent applications pending in Japan and four patents issued
in Israel. Further, the Company has two patent applications pending under the
Patent Cooperation Treaty (PCT) with the possibility of filing one PCT
application in the EPO, Canada, Japan and Israel and one PCT application in
Canada, the EPO and Japan. None of the Company's domestic and foreign patents
that have issued will expire in the near future. The Company's oldest patent
is not scheduled to expire for more than seven years. There can be no
assurance, however, that the claims allowed in any of the Company's existing
or future patents will provide competitive advantages for the Company's
products, will not be successfully challenged or circumvented by competitors
or that pending patent applications will ultimately issue as patents. Under
current law, patent applications in the United States are maintained in
secrecy until patents are issued and patent applications in foreign countries
are maintained in secrecy for a period after filing. The right to a patent in
the United States is attributable to the first to invent, not the first to
file a patent application. The Company cannot be sure that its product or
technologies do not infringe patents that may be granted in the future
pursuant to pending patent applications or that its products do not infringe
any patents or proprietary rights of third parties. In the event that any
relevant claims of third-party patents are upheld as valid and enforceable,
the Company could be prevented from selling its products or could be required
to obtain licenses from the owners of such patents or be required to redesign
its products to avoid infringement. There can be no assurance that such
licenses would be available or, if available, would be on terms acceptable to
the Company or that the Company would be successful in any attempts to
redesign its products or processes to avoid infringement. The Company's
failure to obtain these licenses or to redesign its products would have a
material adverse effect on the Company's business, financial condition and
results of operations.
 
  The Company also has been granted registration of six trade or service marks
in the U.S., and it has eight more U.S. applications for trademarks awaiting
approval. The Company has also filed three trademark applications under the
European Trademark (ECT) procedure.
 
  The Company's ability to compete depends upon its ability to protect its
proprietary information through various means, including ownership of patents,
copyrights, mask work registrations and trademarks. While no intellectual
property right of the Company has been invalidated or declared unenforceable,
there can be no assurance that such rights will be upheld in the future. The
Company believes that, in view of the rapid pace of technological change in
the semiconductor industry, the technical experience and creative skills of
its engineers and other personnel are the most important factors in
determining the Company's future technological success.
 
  TranSwitch has entered into various license agreements for product or
technology exchange. The purpose of these licenses has, in general, been to
obtain second sources for standard products or to convey or receive rights to
certain proprietary or patented cores, cells or other technology. In March
1995, the Company entered into an agreement with StrataCom, Inc., whereby the
Company obtained the right to use intellectual property covered by two
StrataCom, Inc. patents. The Company entered into an OEM relationship with IBM
Corporation in 1994, whereby it was granted the right to purchase and resell
two ATM line interface products.
 
  The Company sells its products into the telecommunications industry, an
industry whose products are subject to various standards which are agreed upon
by recognized industry standards committees. Where applicable, the Company
designs its product to be in conformity with these standards. The Company has
received and expects to continue to receive, in the normal course of business,
communications from third parties stating that if certain of TranSwitch's
products meet a particular standard, these products may infringe one or more
patents of that third party. After a review of the circumstances of each
communication, the Company in its discretion and upon the advice of counsel
has taken or may take in the future one of the following courses of
 
                                       4
<PAGE>
 
action; the Company may negotiate payment for a license under the patent or
patents that may be infringed, the Company may use its technology and/or
patents to negotiate a cross-license with the third party or the Company may
decline to obtain a license on the basis that it does not infringe the
claimant's patent or patents, or that such patents are not valid, or other
basis. There can be no assurance that licenses for any of these patents will
be available to the Company on reasonable terms, or that the Company would
prevail in any litigation seeking damages or expenses from the Company or to
enjoin the Company from selling its products on the basis of any of the
alleged infringements.
 
MANUFACTURING AND QUALITY
 
  TranSwitch's manufacturing objective is to produce reliable, high quality
devices cost-competitively. To this end, the Company seeks to differentiate
itself by maximizing the reliability and quality of its products, achieving
on-time delivery of its products to its customers, minimizing capital and
other resource requirements by subcontracting capital-intensive manufacturing
and achieving a gross margin commensurate with the value of its products.
 
  Effective June 25, 1997, the Company was registered by TUV Rheinland of
North America, Inc. as complying with the requirements of ISO-9001.
 
  All of the Company's VLSI devices are manufactured by established
independent foundries. This approach permits the Company to focus on its
design strengths, minimize fixed costs and capital expenditures and access
diverse manufacturing technologies. Currently, the Company utilizes four
foundries to process its wafers: Texas Instruments Incorporated (TI), Symbios
Logic Inc. and LSI Logic Corporation in the U.S. and Taiwan Semiconductor
Manufacturing Company Limited (TSMC) in Taiwan. Foundries are required to have
qualified and reliable processes, high-frequency test capability, ISO-9002
qualification and quick turnaround prototyping. The selection of a foundry for
a specific device is based on availability of the required process technology
and the foundry's capability to support the particular set of tools used by
TranSwitch for that device. Currently, TI manufactures all of the Company's
BiCMOS devices. The Company entered into a foundry agreement with TI in
December 1995, pursuant to which the Company received access to TI's process
technology through 2000. The Company also has an agreement with TSMC that
guarantees the Company a minimum capacity level for four years, through 1999,
and in return the Company has agreed to purchase unutilized commitment below
an agreed minimum level. See also "Note 13 of Notes to Consolidated Financial
Statements."
 
  There are certain significant risks associated with the Company's reliance
on outside foundries, including the lack of assured wafer supply and control
over delivery schedules, the unavailability of or delays in obtaining access
to key process technologies and limited control over quality assurance,
manufacturing yields and production costs. In addition, the manufacture of
integrated circuits is a highly complex and technologically demanding process.
Although the Company has undertaken to diversify its sources of semiconductor
device supply and works closely with all its foundries to minimize the
likelihood of reduced manufacturing yields, the Company's foundries have from
time to time experienced lower than anticipated manufacturing yields,
particularly in connection with the introduction of new products and the
installation and start up of new process technologies. Such reduced yields
have at times adversely affected the Company's operating results. There can be
no assurance that the Company's foundries will not experience lower than
expected manufacturing yields in the future, which could materially and
adversely affect the Company's business, financial condition and operating
results.
 
COMPETITION
 
  The semiconductor industry is intensely competitive and is characterized by
price erosion, rapid technological change, shortage in fabrication capacity,
heightened international competition in many markets, and unforeseen
manufacturing yield problems. The telecommunications and data communications
industries, which are the primary target markets for TranSwitch, are also
becoming intensely competitive because of deregulation and heightened
international competition. This heightened competition is likely to result in
pricing
 
                                       5
<PAGE>
 
pressures on the Company's products, which could materially and adversely
affect the Company's business, financial condition and operating results.
 
  TranSwitch believes that the principal bases of competition in the
semiconductor industry include product definition, product design, test
capabilities, reliability, functionality, time-to-market, reputation and
price. The Company believes that it competes favorably with respect to these
factors. TranSwitch also believes that its competitive strengths include the
distribution channels it has established, the Company's workforce of highly
experienced digital and mixed-signal circuit designers with strong systems
architecture skills, and its proprietary design and development tools,
including its proprietary simulations and testing software and its library of
analog and digital blocks and cells.
 
  The ability of the Company to compete successfully in the rapidly evolving
area of high performance integrated circuit technology depends on factors both
within and outside its control, including success in designing and
subcontracting the manufacture of new products that implement new
technologies, protection of Company products by effective utilization of
intellectual property laws, product quality, reliability, price, efficiency of
production, the pace at which customers incorporate the Company's integrated
circuits into their products, success of competitors' products and general
economic conditions. Although the Company believes that it competes favorably
on the basis of functionality, reliability and price, there is no assurance
that the Company will be able to compete successfully in the future.
 
  The Company's competition consists of suppliers of similar products from the
United States as well as other countries, including internal competition from
semiconductor divisions of vertically integrated companies like Lucent
Technologies, IBM Corporation, NEC Corporation and Siemens Corporation. New
entrants are also likely to attempt to obtain a share of the market for the
Company's current and future products. The Company's principal competitors in
the asynchronous/PDH and SONET/SDH areas are AMCC Corporation, Crystal
Semiconductor, Inc., Dallas Semiconductor Corp., EXAR Corporation, Integrated
Telecom Technology, Inc., Lucent Technologies, National Semiconductor
Corporation, PMC Sierra Corporation, Texas Instruments, Inc., Triquint
Semiconductor Inc., Vitesse Semiconductor Corp. and VLSI Technology. In
addition, there are a number of ASIC vendors, including AMI Industries, Inc.,
LSI Logic Corp., and SGS-Thompson Microelectronics, Inc. who compete with the
Company by supplying customer-specific products to OEMs. In the ATM area, the
Company's principal competitors include all the vendors mentioned above and
AMD Corporation, MMC Networks, Inc. and IDT. Numerous other domestic and
international vendors have announced plans to enter this market.
 
BACKLOG
 
  As of December 31, 1997, the Company's backlog was $9.4 million, as compared
to $4.9 million as of December 31, 1996. Backlog represents firm orders
anticipated to be shipped within the next 12 months. The Company's business
and, to a large extent, that of the entire semiconductor industry is
characterized by short-term order and shipment schedules. Since orders
constituting the Company's current backlog are subject to changes in delivery
schedules or to cancellation at the option of the purchaser without
significant penalty, backlog is not necessarily an indication of future
revenue.
 
EMPLOYEES
 
  As of December 31, 1997, the Company had 115 full time employees. The
Company's employees are not represented by any collective bargaining agreement
and the Company has never experienced a work stoppage. The Company believes
that its employee relationships are good.
 
ITEM 2. PROPERTIES
 
 
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<PAGE>
 
FACILITIES
 
  The Company's headquarters are located in a suburban office park in Shelton,
Connecticut where it leases approximately 40,000 square feet in a four story
office building. Product development and all final inspection and shipping,
marketing and administration activities are located at this facility.
Approximately 80% of the existing space is fully utilized and the Company
believes its current space to be adequate to meet its needs for the next 12
months, although there can be no assurance that the space will be adequate or
that the Company will be able to obtain additional space on commercially
reasonable terms, if necessary. The lease is due to expire in November, 2007.
The Company also leases approximately 1,100 square feet in Research Triangle
Park, North Carolina where additional product development efforts take place.
In September, 1997 the Company leased approximately 3,200 square feet in
Stoneham, Massachusetts for product development and sales support. The Company
leases a 1,100 square foot sales and support facility in Sunnyvale,
California. The Company also maintains a small sales office in Brussels,
Belgium. In February 1996, the Company opened a new leased facility of 2,000
square feet in Taipei, Taiwan for product development and sales support.
 
ITEM 3. LEGAL PROCEEDINGS
 
  None.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY-HOLDERS
 
  No matters were submitted to a vote of security holders during the three
months ended December 31, 1997.
 
 
                                       7
<PAGE>
 
                                    PART II
 
ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS
 
  The Company's Common Stock has been quoted on the Nasdaq National Market
tier of The Nasdaq Stock Market under the symbol "TXCC" since its initial
public offering on June 14, 1995. The following table sets forth, for the
periods indicated, the range of quarterly high and low bid information for the
Company's Common Stock as reported on the Nasdaq National Market:
 
<TABLE>
<CAPTION>
                                                                HIGH BID LOW BID
                                                                -------- -------
   <S>                                                          <C>      <C>
   1996
   First Quarter...............................................  $13.75  $ 7.88
   Second Quarter..............................................   21.63   12.44
   Third Quarter...............................................   13.25    5.50
   Fourth Quarter..............................................    7.00    3.63
   1997
   First Quarter...............................................  $ 7.63  $ 4.63
   Second Quarter..............................................    9.88    4.00
   Third Quarter...............................................   12.38    8.25
   Fourth Quarter..............................................   14.25    6.82
</TABLE>
 
  On October 10, 1997, the Company issued 14,500 shares of Series A
Convertible Preferred Stock ("Series A Stock") to eleven accredited investors
in a private placement transaction exempt from registration under Rule 506 of
Regulation D under the Securities Act of 1933, as amended. The aggregate
consideration received by the Company for the Series A Stock was $14.5 million
in cash, or $1,000 per share. Each share of Series A Stock is convertible into
shares of Common Stock at any time at the option of the stockholder holding
such Series A Stock, subject to certain limitations, at the lesser of (i)
$10.58 per share and (ii) ninety percent (90%) of the average of the closing
bid price of the Company's Common Stock, as reported by the Nasdaq National
Market, for the ten (10) trading days immediately preceding the date written
notice of conversion is received by the Company; provided, however, that, in
no event shall the conversion price per share of Series A Stock be less than
$4.86 per share. Unless converted sooner at the option of the holders of
Series A Stock, all shares of Series A Stock will convert to Common Stock on
October 10, 2002 if, at that time, the Company's Registration Statement on
Form S-3 (Registration No. 333-40897) is in force and effect and the Company
is in compliance with the terms of the Series A Stock.
 
  As of February 28, 1998, there were approximately 238 holders of record of
the Company's Common Stock and at least 3,000 beneficial holders, based on
information obtained from the Company's transfer agent.
 
  The Company has never paid cash dividends on its Common Stock. The Company
currently intends to retain earnings, if any, for use in its business and does
not anticipate paying any cash dividend in the foreseeable future. In
addition, the Company's line of credit loan agreement prohibits the payment of
cash dividends without prior bank approval. Any future declaration and payment
of dividends will be subject to the discretion of the Company's Board of
Directors, will be subject to applicable law and will depend upon the
Company's results of operations, earnings, financial condition, contractual
limitations, cash requirements, future prospects and other factors deemed
relevant by the Company's Board of Directors.
 
                                       8
<PAGE>
 
ITEM 6. SELECTED FINANCIAL DATA
 
  The following table includes selected consolidated financial data for each
of the five years ended December 31, 1997 which are derived from and more
fully described in the consolidated financial statements and notes included in
this report at Item 14.
 
 Amounts presented in thousands, except per share data
 
<TABLE>
<CAPTION>
                                           YEAR ENDED DECEMBER 31,
                                    ------------------------------------------
                                     1997     1996     1995    1994     1993
                                    -------  -------  ------  -------  -------
<S>                                 <C>      <C>      <C>     <C>      <C>
CONSOLIDATED STATEMENT OF OPERA-
 TIONS DATA:
Total revenues....................  $27,084   19,650  17,466   12,101   12,018
Gross profit......................   15,830    5,844  10,071    6,185    6,006
Net loss..........................   (1,873) (10,077) (1,773)  (3,937)  (1,094)
Basic loss per share (1)(2)(3)....  $  (.15)   ( .86)   (.18)    (.48)
Shares used in calculation of
 basic loss per share............    12,152   11,751  10,062    8,178
<CAPTION>
                                                 DECEMBER 31,
                                    ------------------------------------------
                                     1997     1996     1995    1994     1993
                                    -------  -------  ------  -------  -------
<S>                                 <C>      <C>      <C>     <C>      <C>
CONSOLIDATED BALANCE SHEET DATA:
Cash, cash equivalents and short
 term investments.................  $21,618   12,688  17,250    3,352    6,702
Working capital...................   25,648   14,650  21,811    3,656    7,634
Total assets......................   36,589   23,311  32,670    8,969   10,994
Note payable to bank..............      --       --      --     1,191      128
Mandatorily redeemable convertible
 preferred stock..................      --       --      --    20,252   20,211
Stockholders' equity (deficit)....  $30,161   17,299  26,706  (15,324) (11,445)
</TABLE>
- --------
(1)See Note 1 of Note to Consolidated Financial Statements included in this
Report at Item 14.
 
(2) Gives effect to the mandatory conversion of all then outstanding Preferred
    Stock into 7,009,742 shares of Common Stock on completion of the Company's
    initial public offering in June, 1995. 1994 per share amount based on pro-
    forma weighted average shares outstanding for 1994.
 
(3)Net loss per share amounts prior to 1994 are not meaningful.
 
                                       9
<PAGE>
 
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
        RESULTS OF OPERATIONS
 
  The following discussion should be read in conjunction with the Consolidated
Financial Statements and the notes thereto included in this Report at Item 14.
 
OVERVIEW
 
  TranSwitch Corporation commenced its operations in April, 1988. Since
incorporation, the Company has designed, sourced and marketed high-speed VLSI
devices for public and private network applications worldwide. The Company
shipped its first product in 1990 and has increased its volume of shipments
over the last eight years. The Company's product development efforts have been
focused on devices that meet the needs of public and private network
telecommunications and data communications equipment providers and are
compliant with established standards in these markets, including
asynchronous/PDH, SONET/SDH and the emerging ATM standards. The Company's
products are generally incorporated into original equipment manufacturer's
(OEM's) products at the design stage, which often requires significant
expenditures by the Company well in advance of substantial orders from the
customer.
 
  The Company has not been profitable, on a yearly basis, since its inception.
As of December 31, 1997, the Company had an accumulated deficit of $30.0
million and there can be no assurance the Company will achieve profitability
in the future. The Company's operating results are subject to quarterly and
annual fluctuations as a result of a wide variety of factors that could
materially and adversely affect profitability, including but not limited to
competitive pressures on selling prices, availability and cost of
semiconductor foundry capacity and materials, fluctuations in yields, changes
in product mix, the Company's ability to introduce new products and
technologies on a timely basis, market acceptance of products of both the
Company and its customers, scheduling of orders by its customers, decisions by
customers to withhold or delay orders, fluctuations of inventory cycles in the
industry, foreign sales and currency fluctuations, the level of orders that
are received and can be shipped in a quarter and whether the Company's
customers buy through a distributor or directly from the Company. See "Certain
Factors that May Affect Future Results."
 
  The Company recognizes product revenues upon shipment to customers. Sales to
certain distributors are made under distributor agreements which provide
certain price protection and return and allowance rights to the distributor.
 
RESULTS OF OPERATIONS
 
YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
 
  Total Revenues. The Company derives its revenues principally from the sales
of its products. In 1997, the Company reported revenues of $27.1 million, an
increase of 38.0% over 1996. The increase was primarily in product revenues as
this was the Company's focus. The Company did not derive any revenue in 1997
attributable to product license and royalty fees. In December 1995, the
Company repurchased from Texas Instruments its license agreement (the "TI
License") which was the sole source of license and royalty fees in 1995. In
1996, the Company reported revenues of $19.7 million, an increase of 13.0%
over 1995. This increase was primarily due to the continued increase of
product revenues which grew to 97.9% of total revenues in 1996.
 
  In 1997, Insight Electronics, Inc. (a distributor selling to various end
users, none of which comprise more than 10% of the Company's total revenues)
and Tellabs Operations, Inc. accounted for 41% and 16% of total revenues,
respectively. In 1996, ECI Telecom, Ltd., Insight Electronics, Inc. and
Tellabs Operations, Inc. accounted for 22%, 16% and 14% of total revenues,
respectively. In 1995, Tellabs Operations, Inc. and Insight Electronics, Inc.
accounted for 17% and 16% of total revenues, respectively. No other customer
accounted for more than 10.0% of the Company's total revenues during these
periods.
 
                                      10
<PAGE>
 
  Foreign sales, primarily consisting of sales to customers in Europe, the
Middle East and the Far East, constituted 33%, 46% and 38% of total revenues
in 1997, 1996 and 1995, respectively. All sales are denominated in U.S.
dollars. The Company anticipates that international revenues will continue to
represent a significant portion of total revenues, particularly as the Company
opens direct sales offices in foreign countries. The Company maintains a sales
support office in Europe and one in the Far East. A significant portion of the
Company's total revenues may be subject to risks associated with foreign
sales, including unexpected changes in legal and regulatory requirements and
policy changes affecting the telecommunications and data communications
markets, changes in tariffs, exchange rates and other barriers, political and
economic instability, and potentially adverse tax consequences. In particular,
sales to Korea and other Pacific Rim countries may be impacted by the current
financial instability plaguing these nations. The currency fluctuations and
difficulty of obtaining loans from unstable banking and other financial
institutions in the Far East may cause the Company's customers in that region
to delay or reduce their orders.
 
  Product revenues, net. In 1997, product revenues grew 40.1% to $26.9 million
from $19.2 million in 1996. This growth was driven by a broad strength across
all of the Company's product lines. In 1996, product revenues grew 16.8% to
$19.2 million from $16.5 million in 1995. This growth was primarily driven by
increased sales of SONET/SDH products. Revenues from ATM products as a portion
of total product revenues grew significantly both in absolute dollars and as a
percentage of total revenues during 1995 as systems manufacturers designed
products incorporating the new ATM standard and the Company introduced new ATM
VLSI devices.
 
  Gross profit. Gross profit is derived from product sales. Cost of products
sold includes the costs of production of finished semiconductors produced by
third-party vendors, direct and indirect costs associated with procurement,
testing and other quality assurance procedures followed by the Company,
product royalty fees and the amortization of product licenses. Gross margin in
1997 increased to 58.4%. The increase was due to the lack of the TI License
expense recognized in 1996 and the growth in total volumes. Gross margin in
1996 decreased to 29.7% of total revenues from 57.6% in 1995 due primarily to
the write down of the TI License in the fourth quarter of 1996. The TI License
was written down to its net realizable value as the incremental revenue which
was originally forecast did not materialize.
 
  In 1997, gross profit increased to $15.8 million, a function of the increase
in overall volume and the lack of the TI License expense recognized in 1996.
In 1996, product gross profit decreased to $5.8 million from $9.6 million in
1995, as the Company recognized $3.1 million of the cost of repurchasing the
TI License in cost of sales. In the fourth quarter of 1996, the Company
reviewed the drop in product revenue that occurred in the third and fourth
quarters and as a result determined that the originally forecasted revenues
were not going to materialize. Also in the cost of sales is the write down of
approximately $600 thousand of ATM product inventory which was primarily
related to those specific products for which there was a significant decline
in revenue the last two quarters of the year.
 
  Research and development. In 1997, research and development expenditures
were $9.2 million, or 33.9% of total revenues, an increase of 3.3% over 1996.
In 1996, research and development expenditures were $8.9 million, or 45.3% of
total revenues, an increase of 34.0% over 1995. The increase was primarily
attributable to increases in staff and in non-recurring engineering charges
related to the introduction of new products during 1996. The Company believes
that the continued introduction of new products is essential to its
competitiveness and is committed to continued investment in research and
development. The Company believes that its research and development expenses
will increase in absolute dollars in the future as it continues to add
products to all of its product lines.
 
  Marketing and sales. In 1997, marketing and sales expense increased 22.5% to
$6.7 million or 24.7% of total revenues compared to 1996. The increase is the
result of the increase in variable commissions on the increased volume as well
as an increase in staff in this area. In 1996, marketing and sales expense
increased 26.0% to $5.5 million or 27.8% of total revenues, from $4.3 million,
or 24.8% of total revenues in 1995. During 1995, the Company added new staff
in this area, opened a new sales office in Sunnyvale, California and Taipei,
Taiwan, and expanded its manufacturing representative coverage. The Company
anticipates that it will
 
                                      11
<PAGE>
 
continue to incur higher marketing and sales expenses in absolute dollars as
it expands its marketing and sales efforts.
 
  General and administrative. In 1997, general and administrative expenses
increased 2.6% to $2.3 million over 1996 or 8.5% of total revenues. In 1996,
general and administrative expenses increased 51.4% to $2.2 million or 11.2%
of total revenues from $1.5 million or 8.0% of total revenues in 1995.
Included in the 1997 and 1996 expense is $225 thousand and $195 thousand,
respectively of non-cash expense related to the recognition of compensation
expense under SFAS No. 123 using a fair value approach to non-employee stock
option grants, and the remaining increase is attributed to the legal and
investor relations expenses required by the Company's being public for the
full year in 1996 versus 1995, in which the Company was a public company for
approximately six months.
 
LIQUIDITY AND CAPITAL RESOURCES
 
  The Company has financed its operations and met its capital requirements
since incorporation in 1988 primarily through cash generated from its
operations, private placements of preferred stock, and borrowings under a
working capital line of credit, and equipment financing line of credit from
Silicon Valley Bank. The Company completed an initial public offering by July
13, 1995 and raised a total of $24.0 million, including $3.1 million from the
exercise of an over-allotment option of 375,000 shares granted to the
Underwriters of the initial public offering. On October 10, 1997, the Company
received net proceeds of $13.7 million in cash in connection with a private
placement of its Series A Convertible Preferred Stock.
 
  The Company's principal sources of liquidity as of December 31, 1997
consisted of $21.6 million in cash and short-term investments and $8.0 million
available under the Company's working capital line of credit and equipment
line of credit provided by Silicon Valley Bank. As of December 31, 1997 the
Company had no outstanding balance under these lines of credit. Pursuant to
the working capital and equipment financing agreements with Silicon Valley
Bank, the Company is restricted from further pledging its assets or granting
additional security interests in such assets.
 
  In 1997, the Company used $2.0 million in cash for operating activities, the
result of a loss of $1.9 million, inclusive of non-cash charges of $1.8
million for depreciation and amortization, an increase of $2.9 million in
accounts receivable and inventory and a corresponding increase of $1.6 million
in accrued expenses. In 1996, the Company used $2.2 million in cash for
operating activities, the result of a loss of $10.1 million, offset by non-
cash charges of $2.2 million for depreciation and amortization, $3.1 million
write-down of the TI License, a decrease of $2.5 million in accounts
receivables and the remainder in other working capital items. In 1995 the
Company used $4.9 million of cash for operating activities to finance an
increase of $3.1 million in accounts receivable, a result of the growth in
total revenues, as well as a $1.4 million increase in inventories to support
the growth in shipments of products, while it sustained a loss of $1.8
million. The increase of $0.7 million in accounts payable was primarily due to
the increase in inventory.
 
  In 1997, 1996 and 1995, the Company paid $0.7 million, $0.4 million and $2.1
million to Texas Instruments. The Company will make a minimum cash payment of
$1,250,000 to Texas Instruments in 1998 under the TI License, in addition to
incremental royalties based upon exceeding certain level of sales volume. The
Company anticipates that it will fund such payment from existing cash and
short term investments. See "Note 13 of Notes to Consolidated Financial
Statements." Capital expenditures, including purchases of computer equipment,
test equipment, furniture and fixtures and software, were $2.7 million in
1997, $1.9 million in 1996 and $1.3 million in 1995. In 1997, they were funded
from existing cash and short term investments. In 1996 and 1995, they were
funded from existing cash and by funds generated in the initial public
offering.
 
  Net cash provided by financing activities consists primarily of proceeds
from the exercise of stock options and warrants of $0.7, $0.3 and $0.3 million
in 1997, 1996 and 1995, respectively, the gross proceeds from the issuance of
common stock for $24.0 million in 1995 and the gross proceeds from the
issuance of preferred stock of $14.5 million in 1997. In June 1995, the
Company repaid all outstanding notes payable of $1.2 million to Silicon Valley
Bank.
 
                                      12
<PAGE>
 
  The Company believes that its existing cash resources and cash generated
from operations will fund necessary purchases of capital equipment and provide
adequate working capital through the end of 1998. However, there can be no
assurance that events in the future will not require the Company to seek
additional capital sooner or, if so required, that such capital will be
available on terms favorable or acceptable to the Company, if at all.
 
  Inflation has not had a significant impact on the Company's operations.
 
CERTAIN FACTORS THAT MAY AFFECT FUTURE RESULTS
 
  From time to time, information provided by the Company, statements made by
its employees or information included in its filings with the Securities and
Exchange Commission (including this Form 10-K) may contain statements which
are not historical facts, so-called "forward-looking statements," which
involve risks and uncertainties. Such forward-looking statements are made
pursuant to the safe harbor provisions of Section 21E of the Securities
Exchange Act of 1934, as amended. In particular, statements in "Item 1.
Business" relating to product introductions and the availability of third
party VLSI fabrication facilities, in "Item 2. Properties" concerning the
adequacy of the Company's current facility space, and in "Item 7. Management's
Discussion and Analysis of Financial Condition and Results of Operations"
relating to anticipated levels of contract revenues and license and royalty
fees, the anticipated level of foreign sales, anticipated increases in
research and development and sales and marketing expenses, and the
availability of capital for working capital and for the purchase of capital
equipment, may be forward-looking statements. The Company's actual future
results may differ significantly from those stated in any forward-looking
statements. Factors that may cause such differences include, but are not
limited to, the factors discussed below. Each of these factors, and others,
are discussed from time to time in the Company's filings with the Securities
and Exchange Commission.
 
  The Company's future results are subject to substantial risks and
uncertainties. The Company currently relies on four third-party VLSI
fabrication foundries to manufacture its products. There are significant risks
associated with this reliance on outside foundries, including the lack of
assured water supply and control over delivery schedules, the unavailability
of or delays in obtaining access to key process technologies and limited
control over quality assurance, manufacturing yields and production costs,
among others. Also, the Company relies on certain intellectual property
protections to preserve its intellectual property rights. Any invalidation of
the Company's intellectual property rights or lengthy and expensive defense of
those rights could have a material adverse affect on the Company. The
development of new technologies, commercialization of those technologies into
products, and market acceptance and customer demand for those products are
critical to the Company's success. Successful product development and
introduction depend upon a number of factors, including accurate new product
definition, timely completion and introduction of new product designs,
availability of foundry capacity, achievement of manufacturing yields, market
acceptance of the Company's products and its customers' products, the ability
to continue to attract, retain and motivate key management and technical
personnel, such as experienced circuit designers and systems applications
engineers, and the ability to accurately specify and certify the conformance
of its products to applicable standards and to develop its products in
conformance with customer standards. The Company believes that factors
affecting its ability to achieve market acceptance of its products include
product performance, time to market, price and other factors. The
semiconductor industry is intensely competitive and is characterized by price
erosion, rapid technological change, shortage in fabrication capacity,
heightened international competition, and unforeseen manufacturing yield
problems. The telecommunications and data communications markets, which are
the Company's primary target markets, are also becoming intensely competitive.
Certain current and potential competitors of the Company are more established,
benefit from greater market recognition, and have substantially greater
financial, development, manufacturing and marketing resources than the
Company. Competitive pressures or other factors could result in significant
price erosion that could have a material adverse effect on the Company's
results of operations. The Company derives a significant
 
                                      13
<PAGE>
 
portion of its total revenues from foreign sales. Foreign sales are subject to
significant risks, including unexpected changes in legal and regulatory
requirements and policy changes affecting the Company's markets, changes in
tariffs, exchange rates and other barriers, political and economic
instability, difficulties in accounts receivable collection, difficulties in
managing distributors and representatives, difficulties in staffing and
managing foreign operations, difficulties in protecting the Company's
intellectual property and potentially adverse tax consequences. In particular,
sales to Korea and other Pacific Rim countries may be impacted by the current
financial instability plaguing these nations. The currency fluctuations and
difficulty of obtaining loans from unstable banking and other financial
institutions in the Far East may cause the Company's customers in that region
to delay or reduce their orders. Historically, a relatively small number of
customers have accounted for a significant portion of the Company's total
revenues. Loss of, or a decrease in orders from any one or more of the
Company's customers could have a material adverse effect on the Company's
results of operations.
 
  The Company has created a committee to study the Year 2000 issue and take
actions to understand the nature and extent of work required to make its
products, systems and infrastructure Year 2000 compliant. The Company uses a
number of computer software programs and operating systems in its internal
operations, including applications in manufacturing, material planning,
product development, financial business systems and various administrative
functions. To the extent that these software applications contain source code
that is unable to appropriately interpret the upcoming year "2000", some level
of modification or possibly replacement of such source code or applications
will be necessary. The Company continues to evaluate the estimated costs
associated with these efforts based on actual experience. While these efforts
will involve some additional costs, the Company believes, based on available
information, that it will be able to manage its total Year 2000 transition
without material adverse effect on its business, financial condition or
operating results.
 
  The Company's quarterly and annual operating results are affected by a wide
variety of factors that could materially adversely affect revenues and
profitability, including: competitive pressures on selling prices; the timing
and cancellation of customer orders; the timing and provision of pricing
protections and returns from certain distributors; availability of foundry
capacity and raw materials; fluctuations in yields; changes in product mix;
the Company's ability to introduce new products and technologies on a timely
basis; introduction of products and technologies by the Company's competitors;
market acceptance of the Company's and its customers' products; the level of
orders received that can be shipped in a quarter; the amount and timing of
recognition of non-recurring engineering revenue; the timing of investments in
research and development, including tooling expenses associated with product
development and pre-production; and whether the Company's customers buy
directly from the Company or from a distributor. Sudden shortages of raw
materials or production capacity constraints can lead producers to allocate
available supplies or capacity to customers with resources greater than those
of the Company, which could interrupt the Company's ability to meet its
production obligations. Historically, average selling prices in the
semiconductor industry have decreased over the life of a product, and as a
result, the average selling prices of the Company's products may be subject to
significant pricing pressures in the future. The Company's business is
characterized by short-term orders and shipment schedules, and customer orders
typically can be canceled or rescheduled without significant penalty to the
customer. Due to the absence of substantial noncancellable backlog, the
Company typically plans its production and inventory levels based on internal
forecasts of customer demand, which are highly unpredictable and can fluctuate
substantially. Because the Company is continuing to increase its operating
expenses for personnel and new product development and for inventory in
anticipation of increasing sales levels, operating results would be adversely
affected if increased sales are not achieved. In addition, the Company is
limited in its ability to reduce costs quickly in response to any revenue
shortfalls. From time to time, in response to anticipated long lead times to
obtain inventory and materials from its foundries, the Company may order in
advance of anticipated customer demand, which might result in excess inventory
levels if expected orders fail to materialize or other factors render the
customer's product less marketable. As a result of the foregoing and other
factors, the Company may experience material fluctuations in future operating
results on a quarterly or annual basis which could materially and adversely
affect its business, financial condition and operating results.
 
                                      14
<PAGE>
 
ITEM 8. CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
  The information required by this Item is contained in the financial
statements and schedule set forth in Item 14 (a) of this Form 10-K.
 
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
        FINANCIAL DISCLOSURE
 
  There has been no change of accountants nor any disagreements with
accountants on any matter of accounting principles or practices or financial
statement disclosure required to be reported under this Item.
 
                                       15
<PAGE>
 
                                   PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
  The information required by this Item is incorporated herein by reference to
the information in the sections entitled "Election of Directors," "Occupations
of Directors and Executive Officers," and "Compensation and Other Information
Concerning Directors and Officers" contained in the Company's definitive proxy
statement to be filed with the Securities and Exchange Commission not later
than 120 days after the close of the fiscal year ended December 31, 1997.
 
ITEM 11. EXECUTIVE COMPENSATION
 
  The information required by this Item is incorporated herein by reference to
the information in the section entitled "Compensation and Other Information
Concerning Directors and Officers" contained in the Company's definitive proxy
statement to be filed with the Securities and Exchange Commission not later
than 120 days after the close of the fiscal year ended December 31, 1997.
 
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
  The information required by this Item is incorporated herein by reference to
the information in the section entitled "Management and Principal
Stockholders" contained in the Company's definitive proxy statement to be
filed with the Securities and Exchange Commission not later than 120 days
after the close of the fiscal year ended December 31, 1997.
 
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
  None.
 
                                      16
<PAGE>
 
                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K
 
(a) 1. Consolidated Financial Statements
 
  For the following financial information included herein, see Index on page
F-1:
 
    Independent Auditors' Report
 
    Consolidated Balance Sheets as of December 31, 1997 and December 31, 1996
 
    Consolidated Statements of Operations for each of the years in the three
  year period ended December 31, 1997.
 
    Consolidated Statements of Stockholders' Equity (Deficit) for each of the
  years in the three year period ended December 31, 1997.
 
    Consolidated Statements of Cash Flows for each of the years in the three
  year period ended December 31, 1997.
 
    Notes to Consolidated Financial Statements
 
 2. Financial Statement Schedule
 
  The following financial statement schedule is included herein:
 
    Schedule II Valuation and Qualifying Accounts
 
    All other schedules are not submitted because they are not applicable,
  not required or because the information is included in the Consolidated
  Financial Statements or Notes to Consolidated Financial Statements.
 
 3. Exhibits
 
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER                               DESCRIPTION
 --------                              -----------
 <C>       <S>
   3.2*    Amended and Restated Certificate of Incorporation of the Company
   3.3*    By-laws, as amended and restated, of the Company
   4.1*    Specimen certificate representing the Common Stock
   4.2*    Fourth Amended and Restated Registration Rights Agreement
   4.3+    Certificate of Designations, Preferences and Rights of Series A
            Preferred Stock
   4.4+    Form of Stock Purchase Agreement, dated October 10, 1997 among the
            Company and the purchasers of Series A Convertible Preferred Stock
  10.1*    1989 Stock Option Plan
  10.2++   Second Amended and Restated 1995 Stock Plan
  10.3*    1995 Employee Stock Purchase Plan
  10.4*    1995 Non-Employee Director Stock Option Plan
  10.5*    Form of Incentive Stock Option Agreement for 1989 Stock Option Plan
  10.6*    Form of Non-Qualified Stock Option Agreement for 1989 Stock Option
            Plan
  10.7***  Form of Incentive Stock Option Agreement under the 1995 Stock Plan
            of the Company
  10.8***  Form of Non-Qualified Stock Option Agreement under the 1995 Stock
            Plan of the Company
  10.9***  1995 Employee Stock Purchase Plan Enrollment/Authorization Form of
            the Company
  10.10*** Form of Non-Qualified Stock Option Agreement under the 1995 Non-
            Employee Director Stock Option Plan of the Company
 #10.11*   Agreement with Texas Instruments Incorporated
  10.12*   Authorized Distributor Agreement with Insight Electronics, Inc.
  10.13*   Development Agreement with Connecticut Innovations, Incorporated
  10.14**  Lease Agreement, as amended, with Robert D. Scinto
  10.15+++ Amended and Restated Promissory Note (Working Capital Line of
            Credit) with Silicon Valley Bank
</TABLE>
 
                                      17
<PAGE>
 
<TABLE>
<CAPTION>
  EXHIBIT
   NUMBER                              DESCRIPTION
  -------                              -----------
 <C>        <S>
  10.16+++  Amended and restated Promissory Note (Equipment Line of Credit)
             with Silicon Valley Bank
  10.17*    Commitment Letter, as amended, from Silicon Valley Bank
  10.18*    Security Agreement with Silicon Valley Bank
  10.19+++  Silicon Valley Bank Loan Modification Agreement
  10.20*    Development and License Agreement with Adaptive Corporation
  10.21*    OEM Agreement for Acquisition of IBM Products with International
             Business Machines Corporation
 #10.22*    License Agreement with StrataCom, Inc.
 #10.23**** Agreement with Texas Instruments Incorporated
 #10.24**** Integrated Circuit Foundry Agreement with Texas Instruments
             Incorporated
  21.1**    Subsidiary of the Company
  23.1**    Consent of KPMG Peat Marwick LLP
  27.1**    Financial Data Schedule
</TABLE>
- --------
   # Confidential treatment obtained as to certain portions.
   * Previously filed as an exhibit to the Company's Registration Statement on
     Form S-1 (File No. 33-91694) and incorporated herein by reference.
   + Previously filed as an exhibit to the Company's Registration Statement on
     Form S-3 (File No. 333-40897) and incorporated herein by reference.
  ++ Previously filed as an exhibit to the Company's Form 10-K for the year
     ended December 31, 1996 and incorporated herein by reference.
 +++ Previously filed as an exhibit to the Company's Form 10-Q for the quarter
     ended September 30, 1997 and incorporated herein by reference.
  ** Filed herewith.
 *** Previously filed as an exhibit to the Company's Registration Statement on
     Form S-8 (File No. 33-94324) and incorporated herein by reference.
**** Previously filed as an exhibit to the Company's Annual Report of Form 10-
     K for the fiscal year ended December 31, 1995
 
(b) Reports on Form 8-K
 
  No reports on Form 8-K were filed by the Company during the fourth quarter
ended December 31, 1997. On February 13, 1998, the Company filed a Form 8-K
reporting its unaudited financial results for its fourth quarter and the
fiscal year ended December 31, 1997.
 
(c) Exhibits
 
  The Company hereby files as exhibits to this Form 10-K, those exhibits
listed in Item 14 (a) (3) above.
 
(d) Financial Statement Schedule
 
  The Company hereby files as a financial statement schedule to this Form 10-
K, the financial statement schedule listed in Item 14(a) (2) above.
 
                                      18
<PAGE>
 
                                  SIGNATURES
 
  PURSUANT TO THE REQUIREMENTS OF SECTION 13 OR 15(D) OF THE SECURITIES
EXCHANGE ACT OF 1934, THE COMPANY HAS DULY CAUSED THIS REPORT TO BE SIGNED ON
ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED.
 
March 27, 1998
 
                                          TranSwitch Corporation
 
                                                    /s/ Dr. Santanu Das
                                          By: _________________________________
                                            Name: Dr. Santanu Das
                                            Title: Chairman of the Board
                                                   President and Chief
                                                    Executive Officer
 
                       POWER OF ATTORNEY AND SIGNATURES
 
  WE, THE UNDERSIGNED OFFICERS AND DIRECTORS OF TRANSWITCH CORPORATION, HEREBY
SEVERALLY CONSTITUTE AND APPOINT SANTANU DAS AND MICHAEL MCCOY, AND EACH OF
THEM SINGLY, OUR TRUE AND LAWFUL ATTORNEYS, WITH FULL POWER TO THEM AND EACH
OF THEM SINGLY, TO SIGN FOR US IN OUR NAMES IN THE CAPACITIES INDICATED BELOW,
ALL AMENDMENTS TO THIS REPORT, AND GENERALLY TO DO ALL THINGS IN OUR NAMES AND
ON OUR BEHALF IN SUCH CAPACITIES TO ENABLE TRANSWITCH CORPORATION TO COMPLY
WITH THE PROVISIONS OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED AND ALL
REQUIREMENTS OF THE SECURITIES AND EXCHANGE COMMISSION.
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THIS
REPORT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS ON BEHALF OF THE COMPANY
AND IN THE CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
         NAME AND SIGNATURE                    TITLE(S)                   DATE
         ------------------                    --------                   ----
<S>                                  <C>                           <C>
      /s/ Dr. Santanu Das            Chairman of the Board,          March 27, 1998
____________________________________  President, and Chief
          DR. SANTANU DAS             Executive Officer
                                      (principal executive
                                      officer)
     /s/ Michael F. Stauff           Senior Vice President, Chief    March 27, 1998
____________________________________  Financial Officer and
         MICHAEL F. STAUFF            Treasurer (principal
                                      financial and accounting
                                      officer)
  /s/ Dr. Steward S. Flaschen        Director                        March 27, 1998
____________________________________
      DR. STEWARD S. FLASCHEN

      /s/ Dr. Charles Lee            Director                        March 27, 1998
____________________________________
          DR. CHARLES LEE
</TABLE>
 
                                      19
<PAGE>
 
<TABLE>
<CAPTION>
         NAME AND SIGNATURE                    TITLE(S)                   DATE
         ------------------                    --------                   ----
<S>                                  <C>                           <C>
    /s/ Dr. Ljubomir Micic           Director                        March 27, 1998
____________________________________
        DR. LJUBOMIR MICIC

  /s/ Dr. Albert E. Paladino         Director                        March 27, 1998
____________________________________
       DR. ALBERT E. PALADINO

     /s/ Erik van der Kaay           Director                        March 27, 1998
____________________________________
         ERIK VAN DER KAAY
</TABLE>
 
                                       20
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
Report of Independent Auditors...........................................  F-2
Consolidated Balance Sheets as of December 31, 1997 and 1996.............  F-3
Consolidated Statements of Operations for each of the years in the three-
 year period ended
 December 31, 1997.......................................................  F-4
Consolidated Statements of Stockholders' Equity for each of the years in
 the three-year period ended December 31, 1997...........................  F-5
Consolidated Statements of Cash Flows for each of the years in the three-
 year period ended December 31, 1997.....................................  F-6
Notes to Consolidated Financial Statements...............................  F-7
</TABLE>
 
                                      F-1
<PAGE>
 
                        REPORT OF INDEPENDENT AUDITORS
 
The Board of Directors and Shareholders
 TranSwitch Corporation:
 
  We have audited the accompanying consolidated balance sheets of TranSwitch
Corporation and subsidiary as of December 31, 1997 and 1996, and the related
consolidated statements of operations, stockholders' equity, and cash flows
for each of the years in the three-year period ended December 31, 1997. These
consolidated financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these consolidated
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 consolidated financial statements referred to above
present fairly, in all material respects, the financial position of TranSwitch
Corporation and subsidiary as of December 31, 1997 and 1996, and the results
of their operations and their cash flows for each of the years in the three-
year period ended December 31, 1997, in conformity with generally accepted
accounting principles.
 
Stamford, Connecticut
February 4, 1998
 
                                      F-2
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
                          CONSOLIDATED BALANCE SHEETS
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31,
                                                            ------------------
                                                              1997      1996
                                                            --------  --------
<S>                                                         <C>       <C>
                          ASSETS
Current assets:
  Cash and cash equivalents................................ $ 20,508  $  3,911
  Short-term investments...................................    1,110     8,777
  Accounts receivable, less allowance for doubtful accounts
   of $218 in 1997 and $140 in 1996........................    4,528     2,893
  Inventories, net.........................................    4,812     3,524
  Prepaid expenses and other current assets................      815       305
                                                            --------  --------
    Total current assets...................................   31,773    19,410
Property and equipment, net................................    3,816     2,647
Product licenses, net......................................    1,000     1,254
                                                            --------  --------
    Total assets........................................... $ 36,589  $ 23,311
                                                            ========  ========
           LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable......................................... $  1,350  $  1,805
  Accrued expenses.........................................    1,235       724
  Accrued compensation.....................................      993       535
  Warranty reserve.........................................      532       286
  Sales allowance reserve..................................      649       356
  Royalty payable..........................................      299       209
  Product license fee payable, current portion.............    1,067       845
                                                            --------  --------
    Total current liabilities..............................    6,125     4,760
Product license fee payable, less current portion..........      303     1,252
Commitments and contingencies (Note 13)
Stockholders' equity:
  Convertible Preferred Stock $0.01 par value; authorized
   15,000 shares; issued and outstanding 14,500 shares in
   1997; none in 1996......................................   14,357       --
  Common Stock $.001 par value; authorized 25,000,000
   shares; issued and outstanding 12,318,271 shares in
   1997; 11,912,486 shares in 1996.........................       12        12
  Additional paid-in capital...............................   45,753    45,375
  Accumulated deficit......................................  (29,961)  (28,088)
                                                            --------  --------
    Total stockholders' equity.............................   30,161    17,299
                                                            --------  --------
    Total liabilities and stockholders' equity............. $ 36,589  $ 23,311
                                                            ========  ========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-3
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                    YEARS ENDED DECEMBER 31,
                                                    --------------------------
                                                     1997      1996     1995
                                                    -------  --------  -------
<S>                                                 <C>      <C>       <C>
Revenues:
  Product revenues, net............................ $26,930  $ 19,236  $16,464
  Research and development contracts...............     154       414      877
  License and royalty fees.........................     --        --       125
                                                    -------  --------  -------
    Total revenues.................................  27,084    19,650   17,466
                                                    -------  --------  -------
Cost of revenues:
  Cost of products sold............................  11,254    10,615    6,913
  Write-down of product license....................     --      3,128      --
  Cost of research and development contracts.......     --         63      482
                                                    -------  --------  -------
    Total cost of revenues.........................  11,254    13,806    7,395
                                                    -------  --------  -------
Gross profit.......................................  15,830     5,844   10,071
                                                    -------  --------  -------
Operating expenses:
  Research and development.........................   9,194     8,928    6,660
  Marketing and sales..............................   6,681     5,454    4,329
  General and administrative.......................   2,288     2,229    1,472
                                                    -------  --------  -------
    Total operating expenses.......................  18,163    16,611   12,461
                                                    -------  --------  -------
Operating loss.....................................  (2,333)  (10,767)  (2,390)
                                                    -------  --------  -------
Interest income (expense):
  Interest income..................................     641       819      664
  Interest expense.................................    (181)     (129)     (47)
                                                    -------  --------  -------
    Interest income, net...........................     460       690      617
                                                    -------  --------  -------
Net loss........................................... $(1,873) $(10,077) $(1,773)
                                                    =======  ========  =======
Basic loss per share (Note 10)..................... $  (.15) $   (.86) $  (.18)
                                                    =======  ========  =======
</TABLE>
 
 
          See accompanying notes to consolidated financial statements.
 
                                      F-4
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
<TABLE>
<CAPTION>
                            COMMON STOCK
                          -----------------
                                            CONVERTIBLE ADDITIONAL
                                             PREFERRED   PAID-IN   ACCUMULATED
                            SHARES   AMOUNT    STOCK     CAPITAL     DEFICIT    TOTAL
                          ---------- ------ ----------- ---------- ----------- --------
<S>                       <C>        <C>    <C>         <C>        <C>         <C>
Balance at December 31,
 1994...................   1,071,992  $  1    $   --     $   913    $(16,238)  $(15,324)
Shares of common stock
 issued upon exercise of
 stock options and
 warrants...............     546,871     1        --         288         --         289
Common stock offered by
 the company in initial
 public offering........   2,875,000     3        --      23,169         --      23,172
Conversion of preferred
 stock to common stock..   7,009,743     7        --      20,235         --      20,242
Compensation related to
 issuance of stock op-
 tions..................         --    --         --         100         --         100
Net loss................         --    --         --         --       (1,773)    (1,773)
                          ----------  ----    -------    -------    --------   --------
Balance at December 31,
 1995...................  11,503,606    12        --      44,705     (18,011)    26,706
Shares of common stock
 issued upon exercise of
 stock options and
 warrants...............     408,880   --         --         319         --         319
Compensation related to
 issuance of stock op-
 tions..................         --    --         --         351         --         351
Net loss................         --    --         --         --      (10,077)   (10,077)
                          ----------  ----    -------    -------    --------   --------
Balance at December 31,
 1996...................  11,912,486    12        --      45,375     (28,088)    17,299
Shares of common stock
 issued upon exercise of
 stock options and
 warrants...............     405,785   --         --         699         --         699
Issuance of convertible
 preferred stock, net of
 issuance costs.........         --    --      12,886        770         --      13,656
Deemed dividend on
 convertible preferred
 stock..................         --    --       1,471     (1,471)        --         --
Compensation related to
 issuance of stock op-
 tions..................         --    --         --         380         --         380
Net loss................         --    --         --         --       (1,873)    (1,873)
                          ----------  ----    -------    -------    --------   --------
Balance at December 31,
 1997...................  12,318,271  $ 12    $14,357    $45,753    $(29,961)  $ 30,161
                          ==========  ====    =======    =======    ========   ========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-5
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                   YEARS ENDED DECEMBER 31,
                                                  -----------------------------
                                                    1997      1996       1995
                                                  --------  ---------  --------
<S>                                               <C>       <C>        <C>
Cash flows from operating activities:
  Net loss......................................  $ (1,873) $ (10,077) $ (1,773)
                                                  --------  ---------  --------
  Adjustments required to reconcile net loss to
   cash flows from operating activities:
    Depreciation and amortization...............     1,807      2,195       802
    Write-down of product license...............       --       3,128       --
    Stock compensation expense..................       380        351       100
    Changes in assets and liabilities:
      Decrease (increase) in accounts receiv-
       able.....................................    (1,635)     2,487    (3,084)
      (Increase) in inventories.................    (1,288)      (753)   (1,440)
      Decrease (increase) in prepaids and other
       current assets...........................      (510)       194      (250)
      Increase (decrease) in accounts payable...      (455)      (216)      742
      Increase (decrease) in accrued expenses
       and other liabilities....................     1,598        516        13
                                                  --------  ---------  --------
        Total adjustments.......................      (103)     7,902    (3,117)
                                                  --------  ---------  --------
        Net cash used in operating activities...    (1,976)    (2,175)   (4,890)
                                                  --------  ---------  --------
Cash flows from investing activities:
  Purchase of product licenses..................        (3)      (445)   (2,176)
  Proceeds from the sale of property and equip-
   ment.........................................       --         --          3
  Capital expenditures..........................    (2,719)    (1,892)   (1,309)
  Purchases of short-term investments...........    (8,615)   (24,057)   (5,620)
  Proceeds from sale of short-term investments..    16,282     18,900     2,000
                                                  --------  ---------  --------
        Net cash provided by (used in) investing
         activities.............................     4,945     (7,494)   (7,102)
                                                  --------  ---------  --------
Cash flows from financing activities:
  Payments on borrowings........................       --         --     (1,191)
  Payments on product license obligations.......      (727)      (369)
  Proceeds from the exercise of stock options
   and warrants.................................       699        319       289
  Proceeds from the issuance of common stock,
   net..........................................       --         --     23,172
  Proceeds from the issuance of convertible
   preferred stock, net of issuance costs.......    13,656        --        --
                                                  --------  ---------  --------
        Net cash provided by (used in) financing
         activities.............................    13,628        (50)   22,270
                                                  --------  ---------  --------
Increase (decrease) in cash and cash equiva-
 lents..........................................    16,597     (9,719)   10,278
Cash and cash equivalents at beginning of year..     3,911     13,630     3,352
                                                  --------  ---------  --------
Cash and cash equivalents at end of year........  $ 20,508  $   3,911  $ 13,630
                                                  ========  =========  ========
Supplemental disclosure of cash flows informa-
 tion:
  Cash paid for interest........................  $    181  $     129  $     47
Supplemental schedule of non-cash financing ac-
 tivities:
  Obligations for purchase of product licenses..  $    --   $     134  $  2,399
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-6
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 Description of Business
 
  TranSwitch Corporation (the "Company") was incorporated in Delaware on April
26, 1988. On January 28, 1994, the Company formed TranSwitch Europe N.V./S.A.,
a wholly-owned subsidiary located in Brussels, Belgium. The Company designs,
develops, markets and supports highly integrated digital and mixed-signal
semiconductor solutions for the telecommunications and data communications
markets.
 
 Principles of Consolidation
 
  The consolidated financial statements include the accounts of the Company
and its wholly-owned subsidiary. All intercompany accounts and transactions
have been eliminated in consolidation.
 
 Reclassifications
 
  Certain prior year amounts have been reclassified to conform with the
current year's presentation.
 
 Cash Equivalents
 
  Cash equivalents of $18,668 and $2,989 at December 31, 1997 and 1996,
respectively, consist of certificates of deposit, U.S. Treasury Bills,
commercial paper and U.S. Agency notes. For purposes of the statements of cash
flows, the Company considers all certificates of deposit, U.S. Treasury Bills,
commercial paper and U.S. Agency notes with original maturities of three
months or less to be cash equivalents.
 
 Investment Securities
 
  The Company adopted Statement of Financial Accounting Standards (SFAS) No.
115 "Accounting for Certain Investments in Debt and Equity Securities." Under
SFAS No. 115, the Company's short-term investments were classified as
available-for-sale and were recorded at fair market value in the accompanying
balance sheet.
 
 Inventories
 
  Inventories are carried at the lower of cost (on a first-in, first-out
basis) or estimated net realizable value.
 
 Property and Equipment
 
  Property and equipment are carried at cost less accumulated depreciation.
Depreciation of property and equipment is provided on the half-year convention
method based on the related assets estimated useful lives, ranging from three
to seven years. Depreciation of semiconductor tooling costs is provided on the
straight-line method using the lesser of three years or the life of the
related semiconductor it produces. Repairs and maintenance are charged to
operations as incurred.
 
 Product Licenses
 
  Product licenses are amortized over the lesser of the Company's estimated
product sales volume or the straight-line method over three to five years.
 
  Subsequent to its acquisition, the Company continually evaluates whether
events and circumstances have occurred that indicate the remaining estimated
useful life of a product license may warrant revision or that the remaining
balance of a product license may not be recoverable. When factors indicate
that a product license should be evaluated for possible impairment, the
Company uses an estimate of the related product licenses' undiscounted future
cash flows over the remaining life of the asset in measuring whether the
product license is recoverable. Any impairment is measured against discounted
cash flows.
 
                                      F-7
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
 
 Revenue Recognition
 
  Sales of product are recognized upon shipment to distributors and original
equipment manufacturers. Sales to certain distributors are made under
distributor agreements which provide the distributor with certain price
protection and return and allowance rights. Revenues are reduced for estimated
price protection and returns based upon historical experience.
 
  Revenues from development contracts are derived from agreements with third
parties. These agreements provide for payments to the Company for the
development of new products and reimbursement for expenses incurred based on
the achievement of certain milestones. Revenues are recognized as the related
costs are incurred over the term of the agreement. The Company primarily
retains exclusive ownership of technology developed in connection with the
design of semiconductors. Technology developed in connection with customized
computer boards generally transfers to third parties.
 
  The Company recognizes royalties and license fees when its obligations under
the license and royalty agreements are fulfilled and when payment has been
received or is reasonably assured.
 
 Concentration of Credit Risk
 
  The Company sells its products to customers in the United States and
overseas. Credit evaluations are done on all new customers and periodically
evaluated for existing customers. The Company establishes an allowance for
doubtful accounts based upon factors surrounding the credit risk of specific
customers, historical trends and other information.
 
 Product Warranties
 
  The Company provides for expected costs that may be incurred under its
product warranties. Estimated warranty costs are accrued as products are sold
and charged to cost of revenues.
 
 Research and Development Costs
 
  Research and development costs are expensed as incurred.
 
 Income Taxes
 
  Income taxes are accounted for under the asset and liability method.
Deferred tax assets and liabilities are recognized for the future tax
consequences attributable to differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax
bases and operating loss and tax credit carryforwards. Deferred tax assets and
liabilities are measured using enacted tax rates expected to apply to taxable
income in the years in which those temporary differences are expected to be
recovered or settled. The effect on deferred tax assets and liabilities of a
change in tax rates is recognized in income in the period that includes the
enactment date.
 
 Earnings per Share
 
  Basic earnings per share are based upon the weighted average common shares
outstanding during the period. Diluted earnings per share assume exercise of
in-the-money stock options outstanding and full conversion of convertible
preferred stock into common stock at the beginning of the year or the date of
issuance, unless they are antidilutive.
 
  Diluted loss per share is not presented as it is the same as basic loss per
share.
 
                                      F-8
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
 
 Use of Estimates
 
  Management of the Company has made a number of estimates and assumptions
relating to the reporting of assets and liabilities and the disclosure of
contingent liabilities to prepare these financial statements in conformity
with generally accepted accounting principles. Actual results could differ
from those estimates.
 
 Accounting Changes
 
  Effective December 1997, the Company adopted Statement of Financial
Accounting Standards (SFAS) No. 128--"Earnings per Share." SFAS No. 128
simplifies the calculation of earnings per share (EPS), replaces primary EPS
with basic EPS and replaces fully diluted EPS with diluted EPS.
 
  Basic EPS is computed by dividing income available to common stockholders by
the weighted average number of common shares outstanding during the period.
The computation of diluted EPS is similar to the computation of basic EPS
except that it gives effect to all potentially dilutive instruments that were
outstanding during the period. In prior years, the Company has computed EPS
without consideration to potentially dilutive instruments due to the losses
incurred by the Company. Accordingly, the adoption of this standard has not
resulted in a change to the Company's previously reported EPS amounts.
 
  In June 1997, the Financial Accounting Standards Board issued SFAS No. 130,
"Reporting Comprehensive Income," and No. 131, "Disclosures about Segments of
an Enterprise and Related Information." Commencing in 1998, SFAS No. 130 will
require companies to report comprehensive income, and SFAS No. 131 will
require companies to report segment performance as it is used internally to
evaluate segment performance. These statements provide for additional
disclosure requirements.
 
(2)  SHORT-TERM INVESTMENTS
 
  Short-term investments, classified as available-for-sale, consist of the
following at December 31, 1997 and 1996:
 
<TABLE>
<CAPTION>
                                        1997                         1996
                            ---------------------------- ----------------------------
                            AMORTIZED UNREALIZED   FAIR  AMORTIZED UNREALIZED   FAIR
                              COST    GAIN (LOSS) VALUE    COST    GAIN (LOSS) VALUE
                            --------- ----------- ------ --------- ----------- ------
   <S>                      <C>       <C>         <C>    <C>       <C>         <C>
   Commercial paper and
    corporate debt securi-
    ties (average maturity
    of 4 months in 1997 and
    1996)..................  $1,110      $ --     $1,110  $3,774      $ --     $3,774
   Corporate bonds.........     --         --        --    1,004        --      1,004
   U.S. Treasury Bill......     --         --        --    3,999        --      3,999
                             ------      -----    ------  ------      -----    ------
     Total.................  $1,110      $ --     $1,110  $8,777      $ --     $8,777
                             ======      =====    ======  ======      =====    ======
</TABLE>
 
  Gross realized gains and losses on sales of securities in 1997 and 1996 were
immaterial.
 
(3) FAIR VALUE OF FINANCIAL INSTRUMENTS
 
  The estimated fair values of our financial instruments at December 31, 1997
and 1996 follow:
 
<TABLE>
<CAPTION>
                                                     1997            1996
                                               ---------------- ---------------
                                               CARRYING  FAIR   CARRYING  FAIR
                                                AMOUNT   VALUE   AMOUNT  VALUE
                                               -------- ------- -------- ------
   <S>                                         <C>      <C>     <C>      <C>
   Cash and cash equivalents.................. $20,508  $20,508  $3,911  $3,911
   Short-term investments.....................   1,110    1,110   8,777   8,777
   Accounts receivable, net...................   4,528    4,528   2,893   2,893
</TABLE>
 
 
                                      F-9
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
  The carrying amounts for cash and accounts receivables, net, approximate
fair value because of the short maturities of these instruments.
 
  Financial instruments that potentially subject the Company to significant
concentrations of credit risk consist principally of cash and trade accounts
receivable. The Company places its cash primarily in market interest rate
accounts. The Company, by policy, limits the amount of credit exposure to any
one financial institution or commercial issuer.
 
(4) INVENTORIES
 
  The components of inventories at December 31, 1997 and 1996 follow:
 
<TABLE>
<CAPTION>
                                                                    1997  19967
                                                                   ------ ------
   <S>                                                             <C>    <C>
   Raw materials.................................................. $1,086 $  600
   Work in process................................................  1,654  1,500
   Finished goods.................................................  2,072  1,424
                                                                   ------ ------
     Total........................................................ $4,812 $3,524
                                                                   ====== ======
</TABLE>
 
(5) PROPERTY AND EQUIPMENT, NET
 
  The components of property and equipment, net at December 31, 1997 and 1996
follow:
 
<TABLE>
<CAPTION>
                                             ESTIMATED USEFUL
                                                  LIVES        1997     1996
                                             ---------------- -------  -------
   <S>                                       <C>              <C>      <C>
   Purchased computer software.............        3 years    $ 4,220  $ 2,756
   Equipment...............................      3-7 years      3,171    2,356
   Semiconductor tooling...................        3 years        879      771
   Furniture...............................      3-7 years        967      351
   Leasehold improvements..................     Lease term        186      158
   Construction in progress................                       106      418
                                                              -------  -------
                                                                9,529    6,810
   Less accumulated depreciationand amorti-
    zation.................................                    (5,713)  (4,163)
                                                              =======  =======
   Property and equipment, net.............                   $ 3,816  $ 2,647
                                                              =======  =======
</TABLE>
 
(6) PRODUCT LICENSES, NET
 
  Product licenses, net amounted to $1,000 and $1,254 at December 31, 1997 and
1996, respectively.
 
  On December 15, 1995 the Company entered into a new agreement with Texas
Instruments (TI) in which it repurchased its license agreement for a total of
$4,875 representing an upfront payment of $2,125 in cash and the discounted
present value of future minimum payments. The Company recorded the repurchased
license (TI license) in its consolidated balance sheet under the caption
product licenses and is amortizing the asset over a five year period based
upon the estimated related incremental product sales. Interest expense is
being accrued over the three year minimum payment period.
 
  In the fourth quarter of 1996, the TI License was written down to its net
realizable value as the forecasted incremental revenues attributable to the TI
license were significantly less than originally anticipated.
 
  The Company purchased other product licenses during 1996 for $314 which are
being amortized over a three year period.
 
                                     F-10
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
 
  Amortization of product licenses amounted to $257, $705 and $0 in 1997, 1996
and 1995, respectively.
 
(7) INCOME TAXES
 
  The tax effect of temporary differences that give rise to deferred tax
assets and deferred tax liabilities at December 31, 1997 and 1996 are
presented below:
<TABLE>
<CAPTION>
                                                                1997     1996
                                                               -------  -------
   <S>                                                         <C>      <C>
   Deferred tax assets:
     Inventory obsolescence................................... $   532  $   497
     Vacation accrual.........................................     137       79
     Warranty reserve.........................................     221      119
     Sales allowance reserve..................................     270      148
     Product license..........................................     --       267
     Net operating losses.....................................  12,244   10,637
     Research and development credit..........................   1,860    1,739
     Other....................................................      90       59
                                                               -------  -------
   Total gross deferred tax assets............................  15,354   13,545
   Less valuation allowance................................... (14,867) (13,384)
                                                               -------  -------
   Net deferred tax assets....................................     487      161
   Deferred tax liabilities:
     Property and equipment...................................    (487)    (161)
                                                               -------  -------
       Total deferred taxes, net of valuation allowance....... $   --   $   --
                                                               =======  =======
</TABLE>
 
  The net change in the total valuation allowance for the year ended December
31, 1997 was an increase of $1,483. Due to the Company's prior operating
losses, there is uncertainty surrounding whether the Company will ultimately
realize its deferred tax assets. Accordingly, these assets have been fully
reserved. Of the total valuation allowance of $14,867, subsequently recognized
tax benefits, if any, in the amount of $1,611 will be applied directly to
contributed capital.
 
  The difference between the statutory federal income tax rate and the
Company's effective tax rate for the years ended December 31, 1997, 1996 and
1995 is principally due to net operating losses.
 
  At December 31, 1997, the Company had available, for federal income tax
purposes, net operating loss carryforwards of approximately $29,440 and
research and development tax credit carryforwards of approximately $1,860
expiring in varying amounts from 2003 through 2012. Certain transactions
involving beneficial ownership of the Company have occurred which resulted in
a stock ownership change for purposes of Section 382 of the Internal Revenue
Code of 1986, as amended. Consequently, approximately $24,000 of the Company's
net operating loss carryforward and $1,410 of the Company's research and
development tax credit carryforward are subject to these limitations.
 
(8) CONVERTIBLE PREFERRED STOCK
 
  The Company has authorized 15,000 shares of preferred stock with a par value
of $.01. On October 10, 1997, the Company issued 14,500 shares of Series A
Convertible Preferred Stock (Series A Stock) for net proceeds, after issuance
costs, of $13,656. The Company allocated $1,614 of the net proceeds to
additional paid-in capital, representing the calculated value of a
preferential conversion feature on the date of issuance. This amount is being
accreted ratably to the Series A Stock as a deemed dividend through the
earliest conversion date.
 
                                     F-11
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
 
  Each share of Series A Stock is convertible into shares of Common Stock at
any time at the option of the holder, subject to certain limitations, at the
lesser of (i) $10.58 per share or (ii) ninety percent (90%) of the average of
the closing bid price of the Company's Common Stock, as reported by the NASDAQ
National Market, for the ten (10) trading days immediately preceding the date
written notice of conversion is received by the Company. Unless converted
sooner at the option of the holders of the Series A Stock, all shares of
Series A Stock will convert to Common Stock on October 10, 2002. No Series A
Stock may be converted until the earlier of (i) January 8, 1998 or (ii) the
date upon which a registration statement filed with the Securities and
Exchange Commission to register additional common shares is declared
effective.
 
  As of December 31, 1997, the Series A Stock was not yet eligible for
conversion into Common Stock.
 
(9) STOCKHOLDERS' EQUITY
 
 Common Stock
 
  On June 19, 1995 and July 13, 1995 the Company completed its initial public
offering of 2,500,000 shares of Common Stock and 375,000 shares of Common
Stock, respectively, all of which were sold by the Company. Concurrent with
consummation of the offering, all outstanding shares of Mandatorily Redeemable
Convertible Preferred Stock were converted into 7,009,743 shares of Common
Stock.
 
 Stock-Based Compensation
 
 1989 Stock Option Plan
 
  Effective January 12, 1989, the Company adopted a Stock Option Plan. Under
the Plan, the Board of Directors (or an appointed committee) grants to all new
employees, and to certain key employees and consultants, incentive stock
options ("qualified" options) and non-qualified stock options to purchase
Common Stock. In 1993, the Company amended the Stock Option Plan, increasing
the total number of common shares reserved for issuance to 1,827,413.
 
  The option price for incentive stock options shall not be less than 100% of
the fair market value (110% in the case of an employee owning more than 10% of
the combined voting power) on the date of grant; and the option price for non-
qualified stock options shall not be less than 85% of the fair market value on
the date of grant.
 
 1995 Stock Plan
 
  On April 11, 1995, the Company's Board of Directors adopted the 1995 Stock
Plan (the 1995 Plan) which was approved by the Company's stockholders on April
19, 1995. The 1995 Plan took effect upon the completion of the Initial Public
Offering. In 1996, the Company increased the total number of shares of Common
Stock authorized under the 1995 Stock Plan and amended and restated the 1995
Stock Plan (as amended and restated, "The 1995 Plan"). At December 31, 1997,
2,469,019 shares of the Company's Common Stock are reserved for issuance
pursuant to the grant to employees of incentive stock options and the grant of
non-qualified stock option, awards or direct purchases of the Company's Common
Stock to employees, consultants, directors and officers of the Company. The
terms of the options granted will be subject to the provisions of the 1995
Plan as determined by the Compensation Committee of the Board of Directors.
The 1995 Plan will terminate ten years after its adoption unless earlier
terminated by the Board of Directors.
 
 1995 Employee Stock Purchase Plan
 
  On April 11, 1995, the Company's Board of Directors adopted the 1995
Employee Stock Purchase Plan (the "1995 Purchase Plan") which was approved by
the Company's stockholders on April 19, 1995. Under the
 
                                     F-12
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
terms of the 1995 Purchase Plan, all employees of the Company, except five
percent or more stockholders, may contribute to the plan, up to 5% of their
annual compensation toward the purchase of the Company's Common Stock. The
Company has reserved 100,000 shares for issuance under the 1995 Purchase Plan.
The purchase price per share is the lesser of (a) 85% of the fair market value
of the Common Stock on the date of the grant of the option, as defined, or (b)
85% of the fair market value of the Common Stock on the date of exercise of
the option, as defined.
 
 Non-Employee Director Stock Option Plan
 
  The 1995 Non-Employee Director Stock Option Plan (the "Director Plan") was
adopted by the Board of Directors on April 11, 1995 and approved by the
Company's stockholders on April 19, 1995. The Director Plan provides for the
automatic grant of options to purchase shares of Common Stock to non-employee
directors of the Company on the anniversary date of each individual board
member joining the Board of Directors. Upon joining the Company's Board,
Directors are granted 12,500 shares, one-third of which vest immediately, one-
third after the first year, and the remaining one-third after the second year.
Annually thereafter, Directors are granted 7,500 shares which vest fully after
one year.
 
  The Director Plan will be administered by the Compensation Committee of the
Board of Directors. No option granted under the Director Plan may be exercised
after the expiration of five years from the date of grant. The exercise price
of options under the Director Plan must be equal to the fair market value of
the Common Stock on the date of grant. Options granted under the Director Plan
are generally nontransferable.
 
 Stock Option Information
 
Information regarding the Company's stock options are set forth as follows:
 
<TABLE>
<CAPTION>
                                                      NUMBER    WEIGHTED AVERAGE
                                                     OF SHARES    OPTION PRICE
                                                     ---------  ----------------
   <S>                                               <C>        <C>
   Outstanding at December 31, 1994................. 1,190,912       $ 0.51
     Granted........................................   556,225        10.34
     Exercised......................................  (390,055)        0.43
     Canceled.......................................   (50,373)        2.00
                                                     ---------       ------
   Outstanding at December 31, 1995................. 1,306,709         3.86
     Granted........................................ 1,524,630         7.63
     Exercised......................................  (296,954)        0.58
     Canceled.......................................  (778,968)       10.17
                                                     ---------       ------
   Outstanding at December 31, 1996................. 1,755,417         4.81
     Granted........................................ 1,277,300         7.26
     Exercised......................................  (382,584)        1.48
     Canceled.......................................  (592,117)        8.38
                                                     ---------       ------
   Outstanding at December 31, 1997................. 2,058,016       $ 5.72
                                                     =========       ======
</TABLE>
 
                                     F-13
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
 
  Options outstanding and exercisable at December 31, 1997 are as follows:
 
<TABLE>
<CAPTION>
                         OPTIONS OUTSTANDING        OPTIONS EXERCISABLE
                   -------------------------------- --------------------
                                WEIGHTED
                                 AVERAGE   WEIGHTED             WEIGHTED
                                REMAINING  AVERAGE              AVERAGE
     RANGE OF        NUMBER    CONTRACTUAL EXERCISE   NUMBER    EXERCISE
 EXERCISE PRICES   OUTSTANDING    LIFE      PRICE   EXERCISABLE  PRICE
 ---------------   ----------- ----------- -------- ----------- --------
 <S>               <C>         <C>         <C>      <C>         <C>
 $ 0.40 to $ 1.20     283,020     1.05      $ 0.73    248,928    $ 0.71
   4.13 to   6.38   1,214,746     8.39        5.22    439,879      5.35
   6.50 to  10.81     443,250     9.53        8.80     61,605      7.41
  10.88 to  12.63     117,000     9.01       11.27     94,000     11.12
 ----------------   ---------     ----      ------    -------    ------
 $ 0.40 to $12.63   2,058,016     7.66      $ 5.72    844,412    $ 4.77
 ================   =========     ====      ======    =======    ======
</TABLE>
 
  Stock options expire five or ten years from the date of grant and are
generally exercisable ratably over four years from the date of grant.
 
  In connection with stock options granted in January 1995 through March 31,
1995, the Company recorded deferred compensation expense of $618 for the
excess of the deemed value for accounting purposes of the Common Stock
issuable upon exercise of such stock options over the aggregate exercise price
of such options. The Company is recording compensation expense over the
applicable vesting periods (primarily four years). For the years ended
December 31, 1997, 1996 and 1995, the Company recorded compensation expense of
$155, $156 and $100, respectively, for these options.
 
  The Company does not recognize compensation expense relating to employee
stock options because the exercise price of the option equals the fair value
of the stock on the date of grant. If the Company had determined the
compensation based on the fair value of the options on the date of grant in
accordance with SFAS No. 123, the pro forma net loss and loss per share would
be as follows:
 
<TABLE>
<CAPTION>
                                                     1997      1996     1995
                                                    -------  --------  -------
   <S>                                              <C>      <C>       <C>
   Net loss-as reported............................ $(1,873) $(10,077) $(1,773)
   Net loss-pro forma..............................  (2,054)  (12,599)  (2,189)
   Basic loss per share-as reported................   (0.15)    (0.86)   (0.18)
   Basic loss per share-pro forma..................   (0.17)    (1.07)   (0.22)
</TABLE>
 
  The effects of applying SFAS No. 123 in this pro forma disclosure are not
necessarily indicative of future amounts because it does not take into
consideration pro forma compensation expense related to grants made prior to
1995. Diluted loss per share amounts are not presented as they are the same as
basic.
 
  As reflected in the pro forma amounts in the preceding table, the average
fair value of each option granted in 1997, 1996 and 1995 was $6.73, $3.00 and
$4.70, respectively. The fair value of each option granted was estimated on
the date of grant using the modified Black-Scholes option pricing model based
on the following weighted average assumptions:
 
<TABLE>
<CAPTION>
                                                               1997  1996  1995
                                                               ----  ----  ----
   <S>                                                         <C>   <C>   <C>
   Risk-free interest rate....................................  5.7%  6.0%  5.5%
   Expected life in years.....................................  4.0   6.0   6.0
   Expected volatility........................................ 66.0% 52.0% 52.0%
   Expected dividend yield....................................  --    --    --
</TABLE>
 
 
                                     F-14
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
  For the years ended December 31, 1997 and 1996, the Company recognized
additional compensation expense of $225 and $195, respectively, as required by
SFAS No. 123 relating to stock options granted to non-employees.
 
 Warrants
 
  Warrants to purchase Common Stock and Preferred Stock have been granted to
the original investors in consideration of additional financing and loans, and
for services performed by various other parties. The warrants presented in the
table below are convertible into Common Stock and Preferred Stock at a rate of
one share of Common Stock and Preferred Stock for each warrant to purchase
Common Stock and Preferred Stock, respectively. During 1995, 58,396 shares of
Preferred Stock warrants were converted into 29,198 shares of Common Stock at
a rate of one share of Common Stock for each two shares of Preferred Stock and
13,488 shares of Preferred Stock warrants were canceled.
 
<TABLE>
<CAPTION>
                             WARRANTS--COMMON STOCK        WARRANTS--PREFERRED STOCK
                         ------------------------------- ------------------------------
                                   PRICE PER EXPIRATION           PRICE PER  EXPIRATION
                          NUMBER     SHARE      DATE     NUMBER     SHARE       DATE
                         --------  --------- ----------- -------  ---------- ----------
<S>                      <C>       <C>       <C>         <C>      <C>        <C>
Outstanding at December
 31, 1994...............  215,409  $.06-1.00 12/96-11/98  71,884  $1.00-1.30 8/90-7/00
  Exercised............. (122,964)       --  12/96-11/98 (58,396) $1.00-1.30 8/99-7/00
  Canceled..............      --         --          --  (13,488) $1.00-1.30 8/99-7/00
                         --------  --------- ----------- -------  ---------- ---------
Outstanding at December
 31, 1995...............   92,445  $.06-1.00 12/96-11/98     --          --        --
  Exercised.............  (82,011)       --  12/96-11/98     --          --        --
                         --------  --------- ----------- -------  ---------- ---------
Outstanding at December
 31, 1996...............   10,434  $.40-1.00 12/96-11/98     --          --        --
  Exercised.............   (8,038)       --  12/96-11/98     --          --        --
                         --------  --------- ----------- -------  ---------- ---------
Outstanding at December
 31, 1997...............    2,393  $.40-1.00 12/96-11/98     --          --        --
                         ========  ========= =========== =======  ========== =========
</TABLE>
 
(10) EARNINGS PER SHARE
 
  The basic loss per share for the years ended December 31, 1997, 1996 and
1995 follows:
 
<TABLE>
<CAPTION>
                                                     1997      1996     1995
                                                    -------  --------  -------
   <S>                                              <C>      <C>       <C>
   Net loss........................................ $(1,873) $(10,077) $(1,773)
   Average shares (in thousands)...................  12,152    11,751   10,062
   Basic loss per share............................ $  (.15) $   (.86) $  (.18)
</TABLE>
 
  Diluted loss per share amounts are not presented as they are the same as
basic.
 
  The weighted average shares of dilutive securities that would have been used
to calculate diluted EPS had their effect not been anti-dilutive are as
follows:
 
<TABLE>
<CAPTION>
                                                         1997     1996    1995
                                                       --------- ------- -------
   <S>                                                 <C>       <C>     <C>
   Options............................................   634,867 281,460 541,490
   Warrants...........................................     1,954   5,153  52,691
   Convertible Preferred Stock                           380,697     --      --
                                                       --------- ------- -------
     Total............................................ 1,017,518 286,613 594,181
                                                       ========= ======= =======
</TABLE>
 
                                     F-15
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
 
(11) EMPLOYEE SAVINGS PLAN
 
  On November 21, 1988, the Company established a 401(k) retirement savings
plan. All employees are entitled to contribute from 1% to 15% of their pre-tax
income, not exceeding the IRS maximum for income deferrals, to the Plan, and
may elect to invest their contributions in various established funds, which
include fixed income, growth and equity funds. In 1997, the maximum
contribution was 20% of pre-tax income subject to IRS limitations. The Company
began providing matching contributions in 1996 for 50 percent of the employees
deferred compensation up to a maximum of 6 percent. The Company's contribution
expense amounted to $188 and $156 for 1997 and 1996, respectively.
 
(12) CONCENTRATION OF SALES
 
  The percentage of total revenues attributable to the Company's significant
customers for the years ended December 31, 1997, 1996 and 1995 follow:
 
<TABLE>
<CAPTION>
                                                                   1997 1996 995
                                                                   ---- ---- ---
   <S>                                                             <C>  <C>  <C>
   Insight Electronics, Inc.*..................................... 41%  16%  16%
   Tellabs Operations, Inc........................................ 16%  14%  17%
   ECI Telecom, LTD...............................................  **  22%   **
</TABLE>
- --------
*  Insight Electronics, Inc. is a distributor to various end-users, none of
   which comprised more than 10% of the Company's total revenues.
 
**  Revenues were less than 10% of the Company's total revenues in these
    years.
 
  Export revenues represented 33%, 46% and 38% of total revenues in 1997, 1996
and 1995, respectively.
 
  Revenues from customers located outside the United States were as follows:
 
 
<TABLE>
<CAPTION>
                                                             1997   1996   1995
                                                            ------ ------ ------
     <S>                                                    <C>    <C>    <C>
     Europe................................................ $3,902 $2,100 $3,084
     Middle East...........................................    517  4,232    --
     Far East..............................................  2,885  1,976  1,798
     Canada and other......................................  1,721    592  1,626
                                                            ------ ------ ------
     Total................................................. $9,025 $8,900 $6,508
                                                            ====== ====== ======
</TABLE>
 
(13) COMMITMENTS AND CONTINGENCIES
 
 Line of Credit
 
  In June 1997, the Company entered into a new line of credit agreement with
Silicon Valley Bank whereby the Company has access up to $6,000 for working
capital purposes, bearing interest at prime + 3/4% due on July 10, 1998, and
$2,000 for equipment purchases, bearing interest at prime +1% due on May 31,
2002. The lines are secured by all corporate assets except intellectual
property of the Company.
 
  The agreement contains certain financial restrictions and covenants which,
among other things, include provisions for maintaining a minimum amount of
cash, net worth and profitability.
 
  At December 31, 1997, no amounts were outstanding under this agreement.
 
                                     F-16
<PAGE>
 
                     TRANSWITCH CORPORATION AND SUBSIDIARY
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
              (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
 
 Development Agreements
 
  From time to time, the Company has entered into agreements with third
parties for the development and/or licensing of products for its manufacture
and sale, or the licensing of technology that the Company may use in the
manufacture of products, for which royalties are paid against actual sales of
these products. The Company recognized royalty expense of $1,110, $1,266 and
$829 in 1997, 1996 and 1995, respectively, under these agreements; these
amounts are included in cost of products sold in the consolidated statements
of operations.
 
 Lease Agreements
 
  Total rental expense under all operating lease agreements aggregated $745,
$446 and $586 during 1997, 1996 and 1995, respectively. Future minimum
operating lease commitments that have remaining, non-cancelable lease terms in
excess of one year at December 31, 1997 follow:
 
<TABLE>
       <S>                                                                <C>
       1998.............................................................. $  548
       1999..............................................................    546
       2000..............................................................    466
       2001..............................................................    396
       2002..............................................................    393
       Thereafter........................................................  1,865
                                                                          ------
                                                                          $4,214
                                                                          ======
</TABLE>
 
 Foundry Purchase Commitments
 
  In April 1996, the Company entered into a foundry agreement with Taiwan
Semiconductor Manufacturing Co., Ltd. (TSMC) which includes future minimum
purchase commitments as follows:
 
<TABLE>
       <S>                                                                  <C>
       1998................................................................ $476
       1999................................................................  128
                                                                            ----
                                                                            $604
                                                                            ====
</TABLE>
 
                                     F-17
<PAGE>
 
                                                                     SCHEDULE II
 
                             TRANSWITCH CORPORATION
 
                       VALUATION AND QUALIFYING ACCOUNTS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                           ADDITIONS
                                      -------------------
                           BALANCE AT CHARGED TO CHARGES               BALANCE
                           BEGINNING  COSTS AND  TO OTHER              AT END
       DESCRIPTION         OF PERIOD   EXPENSES  ACCOUNTS DEDUCTIONS  OF PERIOD
       -----------         ---------- ---------- -------- ----------  ---------
<S>                        <C>        <C>        <C>      <C>         <C>
Year ended December 31,
 1997:
  Deductions from asset
   account:
    Allowance for doubtful
     accounts.............   $  140       100      --         (22)     $  218
    Inventory valuation...    1,196       121      --         (39)      1,278
                             ------     -----      ---       ----      ------
                             $1,336       221      --         (61)     $1,496
                             ======     =====      ===       ====      ======
Year ended December 31,
 1996:
  Deductions from asset
   account:
    Allowance for doubtful
     accounts.............   $  138        14      --         (12)     $  140
    Inventory valuation...      295     1,261      --        (360)      1,196
                             ------     -----      ---       ----      ------
                             $  433     1,275      --        (372)     $1,336
                             ======     =====      ===       ====      ======
Year ended December 31,
 1995:
  Deductions from asset
   account:
    Allowance for doubtful
     accounts.............   $   36       110      --          (8)     $  138
    Inventory valuation...      597        31      --        (333)(1)     295
                             ------     -----      ---       ----      ------
                             $  633       141      --        (341)     $  433
                             ======     =====      ===       ====      ======
</TABLE>
- --------
(1) Includes a reversal of a reserve for inventory on hand which was built up
    in anticipation of a major customer's order in 1994 which was no longer
    required as products were shipped.

<PAGE>
 
                                                                   EXHIBIT 10.14

                           SECOND AMENDMENT OF LEASE

     This Second Amendment of Lease is made as of this 11th day of July, 1997, 
by and between Three Enterprise Drive - Shelton LLC (hereinafter referred to as 
"Landlord"), and TranSwitch Corporation, of Shelton, Connecticut (hereinafter 
referred to as "Tenant").

     In consideration of the mutual benefits and obligations set forth herein, 
the parties hereby amend a certain lease between Landlord and Tenant dated 
November 27, 1996, previously amended by a First Amendment of Lease dated June 
25, 1997, for the lease of space in Landlord's building at Three Enterprise 
Drive, Shelton, Connecticut (the November 27, 1996 lease and all amendments 
thereto hereinafter referred to collectively as the "Lease"), in the following 
manner:

     The First Amendment of Lease is hereby canceled and restated, as amended by
this Second Amendment of Lease, such that as of the Second Amendment of Lease, 
the Lease shall be read and interpreted by reference to only the original 
November 27, 1997 lease and the First Amendment of Lease.

     A.    Paragraph 1.01 of the Lease is deleted and is replaced with the 
following:

           "1.01 The Leased Premises consists of 39,267 square feet of Tenant's 
     Net Rentable Area."

     B.    Paragraph 1.05 of the Lease is deleted and is replaced with the 
following:

           "1.05 The Basic Minimum Annual Rent for the Initial Term is $392,670 
     per annum, payable in equal monthly installments of $32,722.50 per month."

     C.    Reference to Exhibit A in the Lease means the Exhibit A attached to 
the November 27, 1996 lease. Exhibit A, Sheet 2, is hereby deleted along with 
the First Amendment of Lease. "Exhibit A, Sheet 3", a separate exhibit from 
Exhibit A, is added to the Lease and incorporated into it as a new exhibit, and 
is attached to the Third Amendment of Lease. Exhibit A, Sheet 3 shows the 2,514 
sq. ft. of space added to first floor of the Leased Premises by means of this 
Second Amendment of Lease.

     In the event of any conflict between this Second Amendment of Amendment of 
Lease and the November 27, 1996 lease, this First Amendment of Lease shall 
control, the Lease being hereby ratified and to remain in full force and effect 
in all other respects.
<PAGE>
 
     IN WITNESS WHEREOF, the parties have hereunto set their hands and seals as 
of the day and year first above written.

                                         TranSwitch Corporation
                                         
                                         By: /s/ Michael C. McCoy
                                             --------------------------
                                                 Michael C. McCoy

                                                 its duly authorized
                                                 Director of Administration

                                         Three Enterprise Drive - Shelton LCC

                                         By: /s/ Robert D. Scinto
                                             --------------------------
                                                 Robert D. Scinto, a member

                                      2  
                  
<PAGE>
 
State of Connecticut

                                       ss City of Shelton

County of Fairfield

     Personally appeared Michael C. McCoy, singer and sealer of the foregoing 
instrument, who acknowledged himself to be the Director of Administration of 
TranSwitch Corporation and the execution to be his free act and deed and the
duly authorized free act and deed of TranSwitch Corporation, before me, this 8th
                                                                             ---
day of July, 1997.

                                       /s/ Eleanor M. Choate
                                       -----------------------------------
                                       Notary Public
                                        ELEANOR M. CHOATE
                                          NOTARY PUBLIC
                                       MY COMMISSION EXPIRES JULY 31, 1998

State of Connecticut

                                       ss City of Shelton

County of Fairfield

     Personally appeared Robert D. Scinto, signer and sealer of the foregoing 
instrument, who acknowledged himself to be a member of Three Enterprise Drive - 
Shelton LLC and the execution to be his free act and deed and the duly 
authorized free act and deed of Three Enterprise - Shelton LLC, before me, this 
____ day of July, 1997.




                                       -----------------------------------
                                       Commissioner of the Superior Court/
                                       Notary Public

                                       3
<PAGE>
 
EXHIBIT A, SHEET 3
LEASE BETWEEN
THREE ENTERPRISE DRIVE - SHELTON LLC
TRANSWITCH CORPORATION
THREE ENTERPRISE DRIVE
SHELTON, CT


<PAGE>
 
                                LEASE AGREEMENT

     This Lease Agreement is made as of this 27th day of November, 1996, by and 
                                             ----        --------
between Three Enterprise Drive - Shelton LLC, a Connecticut limited liability 
company (hereinafter called "Landlord") and TranSwitch Corporation, a Delaware 
corporation (hereinafter called "Tenant").

                                  WITNESSETH:

                                   ARTICLE I

                                 Data Section

     Wherever this Lease refers to any item specified in this Data Section, such
reference shall be deemed to incorporate the information set forth in the Data 
Section. Some terms mentioned in the Data Section are further defined by other 
provisions in the Lease. Whenever a term is more specifically defined, the more 
specific definition shall control.

     1.01 The Leased Premises consists of 36,753 square feet of Tenant's Net 
Rentable Area.

     1.02 The Leased Premises is located on the first and second floors in a 
building to be constructed by Landlord and to be known as Three Enterprise 
Drive, Shelton, Connecticut. The Leased Premises is further defined by the floor
area outline attached as Exhibit A.

     1.03 The Initial Term of the Lease is from the Commencement Date to the end
of the month 120 full calendar months from and after the Commencement Date.

     1.04 The Commencement Date is upon substantial completion of the Leased 
Premises and the further conditions set forth in paragraph 19.04, estimated to
be October 1, 1997.

     1.05 The Basic Minimum Annual Rent for the Initial Term is $367,530 per 
annum, payable in equal monthly installments of $30,627.50 per month.

     1.06 The Security Deposit is $0.

     1.07 Tenant shall use the Leased Premises for the sole purpose of general 
administrative business offices, engineering laboratories and associated light 
manufacturing.

     1.08 The Notice Address for each of the parties is:

     Landlord                                     Tenant

     Three Enterprise Drive - Shelton LLC         TranSwitch Corporation
     c/o R. D. Scinto, Inc.                       Three Enterprise Drive
     One Corporate Drive                          Shelton, Connecticut 06484
     Shelton, Connecticut 06484
                                                  but until occupancy

                                                  TranSwitch Corporation
                                                  8 Progress Drive
                                                  Shelton, Connecticut 06484

                                     - 1 -
<PAGE>
 
                                  ARTICLE II

                                  Definitions

     The following words and phrases shall have the following meanings.

     2.01 "Leased Premises" means the usable area leased to Tenant in Landlord's
building. The outer vertical boundary of the Leased Premises is outlined on the 
floor plan attached hereto as Exhibit A. The upper boundary of the Leased 
Premises shall be the lower surface of the suspended or finished ceiling. The 
lower boundary of the Leased Premises shall be the surface of the unfinished 
floor. The vertical boundary of the Leased Premises shall be the unfinished 
surface exposed to the Leased Premises of all walls bounding the exterior of the
building, other rentable area, building common area, and other area not for use 
by Tenant (HVAC duct chases and structural column enclosures for example).

     2.02 "Building" means the building in which the Leased Premises is located.

     2.03 "Project" means the Building and the real property appurtenant to the 
Building, including the parking areas for the Building. The current real 
property boundary is described in Exhibit B, attached hereto. The "Project" will
not include any building other than the Building and any ancillary building 
which may serve the Building (a guard station serving the Building, as an 
example of a possible ancillary building). In the event that Landlord desires to
construct on the real estate comprising the Project any building not permitted 
within the definition of the word "Project", the real estate constituting the 
Project shall be reduced by elimination of such other building and the land 
appurtenant to it.

     2.04 "Tenant's Net Rentable Area" means the approximate area of the Leased 
Premises plus a share of the core area of the building in which the Leased 
Premises is located.

     2.05 "Tenant's Pro Rata Share" means the percentage obtained by dividing 
Tenant's Net Rentable area by the total Net Rentable Area in the building in 
which the Leased Premises is located. Although a specific Pro Rata Share may be 
set forth in the Data Section, the Pro Rata Share shall be subject to adjustment
upon increase or decrease of the total Net Rentable Area in the building.

     2.06 "General Common Area" means all areas and facilities in the building 
in which the Leased Premises is located and all exterior areas of the Project 
which are available for the use of all tenants. The General Common Area includes
corridors, janitor closets, rest rooms and parking facilities. General Common 
Area does not include restricted areas such as boiler rooms, machine rooms for 
elevator equipment and utility rooms of the Landlord.

     2.07 "Term of this Lease" means the Initial Term, and if the Lease grants 
any option to extend the Term of this Lease, Term of this Lease shall include 
any validly exercised option to extend.

     2.08 "Basic Operating Cost" shall mean all Operating Expenses of the 
Project, which shall be computed on the accrual basis and shall consist of all 
reasonable and necessary costs and expenses incurred by Landlord to maintain all
facilities in the operation of the Project and such additional facilities now 
and in subsequent years as may be determined by Landlord to be necessary to the 
Project. All Operating Expenses shall be determined in accordance with generally
accepted accounting principles, which shall be consistently applied (with 
accruals appropriate to Landlord's business). The term "Operating Expenses" 
shall include the amortized cost of capital items, provided, however, that the 
useful life of any item shall in no event exceed fifteen years. The term 
"operating expenses" as used

                                     - 2 -
<PAGE>
 
herein shall mean all expenses and costs of every kind and nature which Landlord
shall pay or become obligated to pay because of or in connection with the 
ownership and operation of the Project and supporting facilities of the Project.
Operating Expenses shall be limited so as not to include: specific costs which 
are otherwise allocated to tenant areas under other provisions of this Lease; 
expenses and costs which are billed to and paid by specific tenants; and 
expenses associated with any financing indebtedness of Landlord, whether or not 
secured by the Project. Operating expenses, include, but are not limited to, the
following: (a) the cost of all supplies, materials and equipment used in the 
operation and maintenance of the Project; (b) the cost of utilities, including 
water and power, heating, lighting, air conditioning and ventilating the entire 
Project; (c) management fees at rates in accordance with the prevailing rates 
charged for comparable properties in the area of the Project; (d) the cost of 
all maintenance, janitorial and service agreements for the Project and the 
equipment therein, including, without limitation, alarm service, window cleaning
and elevator maintenance; (e) accounting costs, including the costs of audits by
certified public accountants; (f) the cost of all insurance, including but not 
limited to fire, casualty, liability, rental abatement on account of casualty 
damage, workers compensation and any other type of insurance reasonably 
obtained, all as limited to those coverages applicable to the Project and the 
employee's and Landlord's personal property used in connection therewith; (g) 
the cost of repairs, replacements and general maintenance (excluding repairs and
general maintenance paid by proceeds of insurance or by Tenant or other third 
parties, and alterations attributable solely to tenants of the Project other 
than Tenant); (h) gardening, landscaping, planting, replanting and replacing of 
flowers and shrubbery; (i) any and all General Common Area maintenance costs 
relating to public areas of the Projet, including sidewalks, parking areas, 
landscaping and service areas, including repaving, restriping, plowing and 
sanding of the walks and parking areas, and including rubbish removal from the 
Project; (j) compensation to personnel to implement all of the services set 
forth in this paragraph, including wages, workers compensation insurance 
premiums and other items paid for the employment of said personnel; (k) all 
taxes, service payments in lieu of taxes, excises, assessments, levies, fees or 
charges, general and special, ordinary and extraordinary, unforeseen as well as 
foreseen, of any kind which are assessed, levied, charged, confirmed, or imposed
by any public authority upon the Project, its operation or the rent provided for
in this Lease Agreement (it is agreed that Tenant will be responsible for ad 
valorem taxes on Tenant's personal property, if any, and on the value of 
leasehold improvements to the extent that some exceed standard building 
allowances provided by Landlord under this Lease); and (l) any other item 
reasonably expended for the maintenance, operation, repair and insurance of the 
Project. Notwithstanding anything in this Lease to the contrary, Operating 
Expenses shall in no event include: [i] income tax of Landlord; or [ii] capital 
items, except to the extent that (a) such items are incurred in the reasonable 
anticipation of producing a net savings in Operating Expenses or (b) such items 
are replacements.

        2.09  "Repair" shall mean replacement wherever reasonably necessary.

        2.10  "Consent" or "Approval" of Landlord shall mean approval or consent
in writing.

        2.11  "Notice" from either party to the other shall mean written notice,
served by either party upon the other by certified mail, return receipt 
requested or by a nationally recognized, receipted overnight courier service at 
the address herein set forth or at such other address as either party may from 
time to time designate.

                                  ARTICLE III

                                Grant and Term

        3.01  In consideration of the rent and covenants herein reserved and 
contained on the part of Tenant to be observed and performed, Landlord demises 
and leases to Tenant and Tenant rents from

                                      -3-
<PAGE>
 
Landlord the Leased Premises and the improvements now or hereafter therin.  
Together with the Leased Premises, Landlord grants to Tenant and Tenant's 
employees and invitees the right to use the General Common Area, subject to the
rules and regulations reasonably established by Landlord.

     3.02 The Initial Term shall be the period of time set forth in the Data 
Section.  The Term of this Lease shall commence on the Commencement Date.

                                  ARTICLE IV

                                     Rent

     4.01  Tenant agrees to pay Landlord during the Term of this Lease the Basic
Minimum Annual Rent.

     4.02 Tenant agrees to pay Landlord during the Term of this Lease Additional
Rent, consisting of: [i] Tenant's Pro Rata Share of the Basic Operating Cost;
[ii] all utility charges which are not included as items of Basic Operating Cost
but are the cost responsibility of Tenant under other provisions of this Lease
(which have not been paid by Tenant directly to the utility providing the
service under other provisions of this Lease); [iii] and any other item
specifically set forth elsewhere in this Lease as an item of Additional Rent or
as an item which is in any other manner the cost responsibility of Tenant.
Landlord shall give Tenant within a reasonable time after the commencement of
Landlord's fiscal operating year for the Project a statement of Tenant's Pro
Rata Share of estimated Basic Operating Cost for the ensuing year. Tenant agrees
to pay Tenant's Pro Rata Share of the Basic Operating Cost for each fiscal year
in monthly installments in accordance with Landlord's statement. Landlord shall,
within a reasonable period of time after the end of each fiscal year for which
Basic Operating Cost has been charged in accordance with the estimated charges,
give to Tenant a statement of the actual Basic Operating Cost incurred for the
previous year. Adjustment shall be made for any overpayment or underpayment of
the actual charges resulting from any variance between the actual Basic
Operating Cost for the previous year and the estimated Basic Operating Cost paid
by Tenant, which adjustment may be made by increasing or decreasing the
Additional Rent charges for the next year, or a refund or lump sum billing,
provided, however, that Landlord shall not be required to make such adjustment
more than once per year. If during any fiscal operating year, Landlord shall not
have delivered to Tenant the statement mentioned for such year, Tenant shall
continue to pay Landlord the sums payable for the immediately preceding year,
until the statement for the current year shall have been delivered, at which
time the monthly payments by Tenant shall be adjusted retroactively. If during
all or part of any fiscal year any particular item or items of service or work
(which would constitute an element of Additional Rent hereunder) are not
furnished to any portion of the Project due to the fact that such portion is not
completed, occupied or leased, then for the purposes of computing Additional
Rent payable hereunder, the amount of such expenses for such items shall be
increased by an amount equal to the expenses which would have reasonably been
incurred during such period if Landlord had at his own expense furnished such
items of service or work to such portion of the Project, provided that in no
event shall Landlord charge for any item or work or service not actually
provided to the Project and in no event shall this sentence operate to allow
Landlord to recoup more than 100% of the expenses actually incurred by Landlord.
Utility charges set forth as a portion of Additional Rent, above, may be
included with the statement of estimated Basic Operating Cost and billed and
adjusted in the same manner as Tenant's Pro Rata Share of the Basic Operating
Cost. If any part of the first or last years of the Term of this Lease shall
include part of a tax or operating expense year, Tenant's liability under this
paragraph shall be apportioned so that Tenant shall pay only for such parts of
such tax year and operating expense years that shall be included in the Term of
this Lease. Landlord may elect to bill the full amount of any item of Additional
Rent which is not an item of Basic Operating Cost as such item of expense is
incurred by Landlord (repair of damage caused by Tenant, for example). All items
of

                                      -4-
<PAGE>
 
Additional Rent which are capital items not specifically the immediate cost 
responsibility of Tenant pursuant to other terms of the Lease shall be amortized
in accordance with generally accepted accounting principles, provided that no 
item shall have a useful life of more than fifteen years.

       4.03 Limitation On Operating Expenses Chargeable To Tenant. 
            -----------------------------------------------------  
Notwithstanding anything in this Lease to the contrary, in no event will items 
[i] and [ii] of Additional Rent specified in the first sentence of paragraph 
4.02 exceed $5.25 per square foot of Tenant's Net Rentable Area for the "Base 
Year", on an annualized basis. Notwithstanding anything in this Lease to the 
contrary, in no event will the "Capped Portion of Additional Rent" for any 
calendar year subsequent to the Base Year exceed the "Adjusted Base Year Limit"
increased by the percentage increase in the "CPI" from October 1996 to the 
October preceding the calendar year for which the limit is being determined. 
The "Base Year" is the calendar year in which the Commencement Date occurs. The 
"Capped Portion of Adjusted Rent" is items [i] and [ii] of Additional Rent 
specified in the first sentence of paragraph 4.02, but exclusive of any tax, 
utility and insurance premium components. The "Adjusted Base Year Limit" is 
$5.25 per square foot of Tenant's Net Rentable Area less the tax, utility and 
insurance portions of items [i] and [ii] of Additional Rent specified in the 
first sentence of paragraph 4.02 incurred for the Base Year. "On an annualized 
basis" means that partial years shall be pro-rated. For example, if the 
Commencement Date occurs October 1, 1997, then the $5.25 per square foot limit 
for which Tenant would be responsible during the Base Year would be $5.25 
multiplied by the three twelfths of the calendar year remaining after the 
commencement date. Accordingly, under the foregoing example, items [i] and [ii] 
of Additional Rent specified in the first sentence of paragraph 4.02 would in no
event exceed $5.25 per square foot x 3/12 = $1.3125 per square foot for the 
period from October 1, 1997 through December 31, 1997. The "CPI" is the United 
States Department of Labor Bureau of Labor Statistics Consumer Price Index--All 
Urban Consumers-All Cities (1982-4 = 100), or if such index is no longer 
published, a substitute index selected by Landlord as reflecting similar changes
in purchasing power. Notwithstanding the foregoing, the CPI limit shall not 
apply to any element of Operating Expenses which consists of a service provided 
to the Project and allowed to be charged pursuant to paragraph 2.07 which has
not been charged for the Base Year, but the amount chargeable to Operating
Expenses for any calendar year after the calendar year in which the additional
service has been provided for a full calendar year shall be limited to the 
reasonable cost of such service for the beginning full calendar year in which 
such service is provided increased by the percentage increase in the CPI between
the October preceding such beginning calendar year and the October preceding the
calendar year for which the CPI limit is being determined. For example, if a 24 
hour security guard service had not been provided to the Project at the outset 
of the Term of the Lease but Landlord had at a later date deemed it reasonably 
appropriate to provide such a guard service to the Project, the increase in 
Operating Expenses due to the addition of such 24 hour security guard shall not 
be affected or limited by the preceding CPI limit on the Capped Portion of 
Operating Expenses for the beginning calendar year in which the 24 hour security
guard service has been provided for a full calendar year.

       4.04 The Basic Minimum Annual Rent and the monthly installment portion of
the Additional Rent shall be due in installments, commencing with the
Commencement Date and continuing on the first day of each month thereafter, in 
advance. If the Commencement Date is not the first day of a calendar month, the 
installment due on the Commencement Date shall be pro rated for the fractional 
period remaining in the month of the Commencement Date. It is the intention of 
the Landlord and Tenant that the rents herein shall be net to the Landlord in 
each year during the Term of this Lease, payable without any reduction, 
abatement, counterclaim or setoff. All past due installments of rent shall bear 
interest at the lesser of two percentage points over the prime rate of interest 
as announced by People's Bank, of Bridgeport, Connecticut, or its successor, or 
the maximum rate permitted by applicable law, from date due until payment is 
received. Any liability for unpaid Basic Minimum Annual Rent and Additional Rent
shall survive the termination of the Lease.

                                      -5-
     
<PAGE>
 
                                   ARTICLE V

                               Conduct of Tenant

     5.01 Tenant agrees that Tenant and Tenant's permitted assignees or 
sub-lessees shall use the Leased Premises for any of the sole and exclusive 
purposes set forth in the Data Section. The use of the Leased Premises shall 
also be in accordance with the ordinances and regulations of the municipality in
which the Leased Premises is located. Without limitation of the foregoing, 
Tenant agrees that the Leased Premises will not be used for any purpose other 
than that provided above. Tenant agrees to comply with all rules and 
regulations, of which Tenant is given notice, reasonably established by 
Landlord for the governing of conduct of tenants in general in the Project. 
The current rules and regulations for tenants in the Project are set forth in 
Exhibit C.

     5.02 Tenant agrees that Tenant will not keep, use, sell or offer for sale 
in or upon the Leased Premises any article which may be prohibited by the 
standard form of fire insurance policy. Tenant agrees to pay any increase in 
premiums for fire and extended and/or all risk coverage insurance that may be 
charged during the Term of this Lease on the amount of such insurance which may 
be carried by Landlord on the Project, resulting from the type of equipment, 
merchandise or services used by Tenant in the Leased Premises, whether or not 
Landlord has consented to the same. In determining whether increased premiums 
are the result of Tenant's use of the Leased Premises, a schedule issued by the 
organization making the insurance rate on the Leased Premises, showing the 
various components of such rate, shall be conclusive evidence of the several 
items and charges which make up the fire insurance rate on the Leased Premises 
and the Project.

     5.03 Tenant shall not commit or suffer to be committed any waste to the 
Leased Premises or Project or any nuisance or other act or thing which may 
disturb the quiet enjoyment of any other tenant in the Project.

     5.04 Tenant shall, at Tenant's sole cost and expense, comply with all of 
the requirements of all county, municipal, state, federal and other applicable 
governmental authorities, now in force or which may hereafter be in force and 
not being reasonably disputed by Tenant, pertaining to the Tenant's use of the 
Leased Premises or any act therein by Tenant. Tenant shall faithfully observe in
the use of the Leased Premises all federal, state, county and municipal laws, 
ordinances and regulations now in force or which may hereafter be in force not 
being reasonably disputed by Tenant, excepting any structural changes required 
by such authorities which are not caused by the act or neglect of the Tenant or 
by Tenant's specific use of the Leased Premises. Specific reference is made to 
Tenant's duty to comply with all state, federal and local laws concerning 
environmental protection and Tenant's conduct at the Project. Tenant agrees to 
indemnify Landlord against any cost and expense which Landlord may suffer by 
reason of Tenant's failure to comply with the laws governing its conduct at the 
Project, including all laws concerning environmental protection. Tenant shall 
undertake no acts which would result in the leased Premises being defined as an 
"Establishment" under the environmental laws of the State of Connecticut.

     5.05 Tenant will not place or maintain, or cause to be placed or 
maintained, on any portion of the Project exterior to the Leased Premises or any
portion of the Project (including the Leased Premises) visible from the exterior
of the Leased Premises, any sign or advertising matter without Landlord's 
written consent. Tenant shall not place any object on any portion of the 
Project exterior to the Leased Premises without Landlord's written consent. 
Tenant shall not install or maintain any window treatment without the prior 
written consent of Landlord. Landlord shall not unreasonably delay or withhold 
consent to a sign outside the entrance door to the Leased Premises and a 
listing on the building directory sign.

                                     - 6 -
<PAGE>
 

     5.06 Tenant agrees to keep the Leased Premises in a clean and sanitary 
condition and free from trash, inflammable material and other objectionable 
matter and to make all interior repairs other than to Landlord's mechanical 
systems. Tenant shall maintain all equipment installed by Tenant at Tenant's own
cost and expense. Tenant shall not make any building alteration or addition to 
the Leased Premises without Landlord's consent, which shall not be unreasonably 
withheld. Ordinary office trash in volumes consistent with normal office usage 
may be placed in the dumpster maintained at the Project by Landlord, the cost of
which dumpster may be charged by Landlord as a part of Operating Expenses. 
Tenant shall be responsible for the proper disposal of trash in excess of normal
office usage volumes and for the disposal of any trash other than ordinary 
office trash. For example, any waste that may not be disposed of in an ordinary 
landfill without any special handling (such as biomedical waste from a medical 
office) shall be handled and disposed of by Tenant, at Tenant's sole cost and 
expense, in full compliance with all laws relating to the handling and disposal 
of such waste.

     5.07 If Tenant refused or neglects to perform any item of maintenance or 
repair which is Tenant's responsibility within a reasonable time, Landlord may 
make such repairs without liability to Tenant for any loss or damage that may 
accrue to Tenant's merchandise, fixtures, or other property or to Tenant's 
business by reason thereof, and upon completion thereof, Tenant shall pay 
Landlord's costs for making such repairs upon presentation of an invoice 
therefor, as Additional Rent, which shall include interest from the date of such
repairs at the same rate as that due for overdue rental payments. In the case of
a repair which is not an emergency repair, Landlord shall not exercise 
Landlord's right to make the repair unless Tenant has not commenced the repair 
within ten days after written demand from Landlord and proceeds to complete same
with diligence.

     5.08 Tenant shall promptly pay all contractors and materialmen hired by 
Tenant to furnish any labor or materials which may give rise to the filing of a 
mechanic's lien against the Project attributable to contracts entered into by 
the Tenant. Should any such lien be made or filed, Tenant shall cause same to be
discharged as a lien against the Project within the sooner of [i] 60 days after 
Tenant receives notice of such lien or [ii] 60 days after request by Landlord to
remove such lien. If bond is filed and such lien is discharged, Tenant shall not
be obligated to discharge the lien by payment. Notwithstanding any notice and 
grace period before default elsewhere set forth in this Lease, if Tenant shall 
fail to discharge such lien within the time period set forth in this paragraph 
above, and shall further fail to discharge such lien within ten more business 
days after notice of failure to discharge the lien is given from Landlord, then 
Tenant shall be in material default of the Lease, without any further notice or 
grace period.

                                  ARTICLE VI

                Landlord's Conduct and Services at the Project

     6.01 Landlord agrees to keep the parking areas in the Project reasonably 
free of snow, ice and debris and to keep same reasonably lighted during normal 
business hours of the tenants in the Project. Landlord agrees to keep the 
General Common Area (including any common restrooms) in reasonably good repair 
and order. Landlord shall perform all structural repairs to the building or 
buildings in the Project, all General Common Area in the Project, and all 
mechanical equipment installed by Landlord for heating, ventilation and air 
conditioning, plumbing and other mechanical systems of the Leased Premises. 
Tenant shall pay: [i] Tenant's Pro Rata Share for maintenance and repair of the 
portion of said mechanical systems which are building standard; and [ii] the 
full cost of said maintenance and repair for the portion of said mechanical 
systems servicing the Leased Premises in excess of building standard. Although 
Landlord is responsible for the performance of certain work under this paragraph
the cost of such work may be Tenant's responsibility under this and other 
provisions of the Lease, in full or as a Pro Rata Share.

                                     - 7 -
<PAGE>
 
     6.02 Landlord shall furnish keys to Tenant so that Tenant may have access 
to the Leased Premises before and after normal business hours. No locks other 
than those furnished by Landlord shall be installed on the doors providing 
access to the Leased Premises without Landlord's written consent. Tenant shall 
furnish to Landlord keys to any such locks allowing access to Tenant's Leased 
Premises.

     6.03 Landlord shall have the right to make alterations and/or additions to 
the Project and the buildings and land of the Project, subject to the 
limitations set forth in paragraph 2.03. The exercise by Landlord of any right 
under this paragraph shall be limited so that there shall be no unreasonable 
interference with Tenant's use of the Leased Premises and the General Common 
Area.

     6.04 Landlord shall have the right to establish rules and regulations for 
the use of the parking areas by Tenant and other tenants in the project, but 
Landlord shall not have any duty to police the traffic in the parking areas. 
Tenant shall have the use of the parking areas, existing from time to time in 
the Project, for the benefit of Tenant's employees, visitors and customers, in 
common with other tenants in the Project, which use is to be in accordance with 
Tenant's Pro Rata Share of the parking areas available for all tenants in the
Project, which, in the case of Tenant, shall be four parking spaces per thousand
square feet of Tenant's Net Rentable Area.

                                  ARTICLE VII

                  Insurance, Indemnity and Subrogation Waiver

     7.01 Tenant shall during the entire Term of this Lease keep in full force 
and effect a policy of public liability and property damages insurance. Tenant's
insurance policy shall insure against Tenant's liability for all acts and 
omissions with respect to conduct in the Leased Premises and the Project of 
Tenant and Tenant's agents, servants, employees, licensees and invitees. The 
policy limits of Tenant's Insurance shall be at least $1,000,000 per occurrence,
or such other limits as to public liability and property damage as Landlord may 
reasonably require. Tenant's policy shall name Landlord as an additional insured
and shall contain a clause providing that the Insurer will not cancel or change 
the insurance without first giving the Landlord fifteen days prior written 
notice. Tenant's insurance policy shall be with an insurance company approved by
Landlord and a copy of the policy or a certificate of insurance shall be 
delivered to Landlord prior to the Commencement Date, which approval shall not
be unreasonably withheld or delayed and the decision based solely upon a
reasonably satisfactory rating from a service such as A.M. Best.

     7.02 Tenant shall during the entire Term of this Lease keep in full force 
and effect a hazard and all risk insurance policy, including fire, extended and 
all risk type coverage, in an amount adequate to cover the cost of repair and 
replacement of all alterations, decorations, or improvements made by Tenant in 
the Leased Premises. Tenant's policy shall name Landlord as an additional 
insured and shall contain a clause that the insurer will not cancel or change 
the insurance without first giving the Landlord fifteen days prior written 
notice. Tenant's insurance policy shall be with an insurance company approved by
Landlord and a copy of the policy or a certificate of insurance shall be 
delivered to Landlord prior to the Commencement Date, which approval shall not 
be unreasonably withheld or delayed and the decision based solely upon a 
reasonably satisfactory rating from a service such as A.M. Best.

     7.03 Landlord agrees to maintain or cause to be maintained hazard and all 
risk insurance, with fire, extended and all risk type coverage, upon all of the 
buildings, structures or improvements (excluding tenant improvements required to
be insured by Tenant under other terms of this Lease) in the Project, in an 
amount adequate to cover the cost of replacing the foregoing in the event of 
fire or

                                      -8-
<PAGE>
 
other destruction, less a commercially reasonable deductible. In the event of 
fire or other destruction to such property, Landlord agrees, subject to the
rights of any mortgagee to insurance proceeds, to immediately collect or cause 
to be collected the insurance proceeds and to apply the same to the
reconstruction and repair of the damaged property. Tenant shall pay Tenant's Pro
Rata Share of the premiums for the insurance specified herein as an item of
Basic Operating Cost Additional Rent.

     7.04 To the extent commercially reasonably obtainable, each policy of 
public liability insurance, hazard insurance or other insurance insuring risks
arising out of any occurrence at the Project, carried by Tenant or Landlord,
shall provide that the insurer waives any rights of subrogation against the
Landlord (in the case of Tenant's policies) and against the Tenant (in the case
of Landlord's policies) in connection with or arising out of any claim or
benefit provided under such insurance policy. Except to the extent not permitted
in any insurance policy obtained by Tenant in accordance with the provisions of
this Article, in no event shall Tenant or any person or corporation claiming an
interest in the Leased Premises by, through or under Tenant and over whom Tenant
shall have control, claim, maintain or prosecute any action or suit at law or in
equity against the Landlord for any loss, cost or damage caused by or resulting
from fire or other risk or casualty in the Project for which Tenant is or may be
insured under a standard hazard and all risk insurance policy, including fire,
extended and/or all risk type coverage, whether or not the property (tangible or
intangible) is insured or required to be insured under this Lease, and whether
or not caused by the negligence of the Landlord, or the agents, or servants, or
employees of the Landlord. Except to the extent not permitted in any insurance
policy obtained by Landlord in accordance with the provisions of this Article,
in no event shall Landlord or any person or corporation claiming an interest in
the Project by, through or under Landlord and over whom Landlord shall have
control, claim, maintain or prosecute any action or suit at law or in equity
against the Tenant for any property damage to the Project caused by or resulting
from fire or other risk or casualty in the Project for which Landlord is
required to be insured under the provisions of the Lease, whether or not caused
by the negligence of the Tenant or the agents, servants and/or employees of the
Tenant.

     7.05 In the case of third party claims arising out of an act or omission of
Tenant or an agent, servant or employee of Tenant (a "Tenant Fault Claim") and 
not out of an act or omission of Landlord or an agent, servant or employee of 
Landlord (a "Landlord Fault Claim"), Tenant shall be responsible for the Tort 
Indemnity of Landlord. In the event of a Landlord Fault Claim, Landlord shall be
responsible for the Tort Indemnity of Tenant. In the event of claims which are 
both Tenant Fault Claims and Landlord Fault Claims, as between Landlord and 
Tenant: each party shall be responsible for the claim in the proportion such 
party's fault in fact bears to the total fault of Landlord and Tenant; and such 
party shall indemnify the other against the portion of the claim for which such 
party is responsible. Tort Indemnity shall mean that the party responsible for 
the indemnification shall provide the legal defense of the claim (counsel being 
subject to the approval of the indemnified party, approval not to be 
unreasonably withheld) and the indemnifying party shall be responsible to pay 
the amount of the claim (subject to the right to defend it) up to the limits of 
the indemnification set forth in this paragraph, above, except that in the case 
of claims which are both Tenant Fault Claims and Landlord Fault Claims, each 
party shall be responsible for its own costs of legal defense. Tort Indemnity 
shall not be owed to the extent that the party owing the indemnification has 
been prejudiced by any failure of the party seeking the indemnification to give 
notice to the other party within a reasonable time after said party becomes 
aware of a claim in which the other party may owe an indemnity obligation under 
this paragraph.

                                      -9-
<PAGE>
 
                                 ARTICLE VIII

                                   Utilities

     8.01 From and after the Commencement Date, Tenant shall pay all charges for
utilities used, consumed in or allocable to the Leased Premises, including, but 
not limited to, fuel, electricity, water and gas. Said utilities may be either 
directly metered to Tenant or shared with other tenants. If any utility 
consumption in the Leased Premises is not separately metered, Landlord may 
allocate the shared utility consumption to the Leased Premises in any reasonable
manner. In the case of building systems such as HVAC, utility consumption of 
such systems may be allocated in accordance with Tenant's Pro Rata Share. The 
charges for all utilities not paid directly to the utility providing the service
shall be paid to Landlord as an element of Additional Rent; and Tenant shall, at
Landlord's option, either pay the separately metered utilities directly to the 
utility providing the service, or pay for said separately metered utilities as 
an item of Additional Rent. Notwithstanding the foregoing, Landlord shall 
provide a separate electric meter for the electricity to be consumed in the 
Leased Premises, and Tenant shall maintain Tenant's own metered account with the
utility company providing service to the Project for such electric meter.


                                  ARTICLE IX

                 Estoppel Statement, Attornment, Subordination

     9.01 Upon request of Landlord or any mortgagee of Landlord, Tenant shall 
execute an estoppel certificate, certifying the status of any facts with respect
to the Lease. Estoppel certification may include; whether the Lease is in full 
force and effect; the rentals due under the Lease and the degree to which same 
have been paid; that there are no defenses or claims against Landlord for any 
alleged violation of the Lease by Landlord, or a statement of such defenses or 
claims; acknowledgement of the interpretation or meaning of any term of the 
Lease, provided such acknowledgement shall not change any term or provision 
hereof; and such other matters reasonably requested to be certified in the 
estoppel certificate.

     9.02 The Tenant agrees that the Lease and all rights of the Tenant herein 
shall, at the election of Landlord or mortgagee, be subordinate to the lien of 
any mortgage or mortgages now or which may hereafter be placed on the Project or
any part of the Project during the term of this Lease. In the event any 
proceeding is brought for the foreclosure of the Leased Premises, Tenant agrees
to attorn to the mortgagee in the event of strict foreclosure, or to the
purchaser in the event of foreclosure by sale or deed in lieu of foreclosure,
and recognize such mortgagee or purchaser (as the case may be) as the Landlord
under this Lease. Tenant further agrees to execute any further instrument or
instruments which the Landlord or its successors in title may at any time 
require to evidence the subordination of this Lease to the lien of any such
mortgage or mortgages and Tenant's agreement to attorn, provided, however, that
the Landlord, if Tenant so requests, obtains a standard non-disturbance
agreement from the mortgagee for the benefit of the Tenant. Notwithstanding the
foregoing, if there shall be a first mortgage placed on all or a portion of the
Project, this Lease shall not be subordinated to any other encumbrance
subsequent in right to the first mortgage unless the first mortgagee shall
consent to such subordination, in writing; Notwithstanding the foregoing,
Tenant's right under this Lease shall not be subordinated to any mortgage, and
Tenant shall not be required to execute any subordination agreement, unless the
mortgagee provides Tenant with standard non disturbance rights, in form
reasonably acceptable to Tenant. Upon execution of this Lease, Landlord shall
use best efforts to obtain a non disturbance agreement from the existing
mortagee of the Project (People's Bank).

     9.03 Tenant agrees to execute and deliver to Landlord or the party 
designated by Landlord,

                                     -10-
<PAGE>
 
within ten days after presentation of the proposed form, any estoppel 
certificate and/or subordination, attornment and/or non disturbance agreement 
requested to be executed by Tenant pursuant to the terms of this Lease. Tenant 
further agrees to include in any such documents, if requested by Landlord: an 
agreement not to pay Landlord rent for more than one month in advance; an
agreement to give any mortgagee a notice of any alleged default by Landlord and 
a reasonable time for such mortgagee to have such default cured before Tenant 
will exercise any right to terminate this Lease; and an agreement that Tenant 
will not look to such mortgagee for the return of any security deposit or other 
monies not actually received by such mortgagee. If Tenant shall not have 
delivered the executed documents, required to be executed and delivered under 
this Article, within the ten day period set forth above, Landlord may give 
Tenant written notice of Tenant's failure to deliver such documents, and if 
Tenant shall then fail to deliver said executed documents within three business 
days after delivery of such written notice, notwithstanding any provision for 
notice and grace period for default elsewhere contained in this Lease, Tenant
shall be in material default of the Lease, and Landlord shall have all rights
provided for in the event of such default, including termination.


                                   ARTICLE X

                        Destruction of Leased Premises

     10.01  Landlord agrees, subject to and excepting the other provisions of 
this Article, that if the Leased Premises shall be damaged by fire or other 
casualty during the term of this lease, Landlord shall, at Landlord's own 
expense, use best efforts to cause the damage to be promptly repaired within a 
reasonable time after such damage has occurred, which period shall not exceed 
six months. If by reason of such occurrence, any portion of the Leased Premises
is thereby rendered untenantable and Tenant ceases use of said portion, the rent
and other charges payable by Tenant hereunder shall be abated in proportion to
the area of the Leased Premises which is rendered untenantable and which is not
used by Tenant, said abatement to continue until the sooner of the time when the
Leased Premises is repaired or until Tenant uses the damaged portion of the
Leased Premises. Landlord's obligation to restore under this Article shall be
limited to the extent of Landlord's deductible on Landlord's property insurance
policy and the insurance proceeds made available by any mortgagee having control
over the disposition of such proceeds. Notwithstanding the foregoing, if there
is such a casualty damage materially adversely affecting Tenant's use and
enjoyment of the Leased Premises, and if Tenant does not vacate the Leased
Premises but continues to use the same, the rent shall be equitably adjusted
based upon the fair rental value of the Leased Premises in its impaired
condition, during the period of materially adverse impairment.

     10.02  In the event that fifty percent or more of the Leased Premises shall
be damaged or destroyed by fire or other cause during the Term of this Lease and
same shall not be repairable by Landlord within six months, Landlord or Tenant
shall have the right, to be exercised by written notice to the other party,
within sixty days from and after said occurrence, to elect to cancel and
terminate this Lease. Upon the giving of such notice, the term of this Lease
shall expire by lapse of time upon the thirtieth day after such notice is given,
and Tenant shall vacate the Leased Premises and surrender the same to Landlord
on such date of expiration.


                                  ARTICLE XI

                   Eminent Domain and Cessation of Business

     11.01  In the event any portion of the Leased Premises or any portion of 
the Project which renders the Leased Premises unusable is taken in condemnation 
proceedings or by any right of eminent

                                     -11-
<PAGE>
 
domain or for any public or quasi-public use, this Lease shall terminate as of
the date of vesting of title in the condemning authority and all rent, including
additional rent, payable under this lease shall be paid to that date.

     11.02  In the event of any taking provided for in this Article, all 
proceeds of any award, judgment or settlement payable by the condemning 
authority shall be and remain the sole and exclusive property of Landlord, and 
Tenant waives any right to make any claim to said award, judgment or settlement 
received by Landlord. Tenant may pursue its own claim against the condemning 
authority permitted by statute to be paid to Tenant without diminishing or 
reducing the award, judgment or settlement payable to Landlord.


                                  ARTICLE XII

                           Assignment and Subletting

     12.02  Tenant will not assign this Lease in whole or in part nor sublet all
or any part of the Leased Premises without the prior written consent of 
Landlord, which shall not be unreasonably withheld or delayed. Landlord hereby 
expressly consents to any assignment or subletting to an entity controlled by 
Tenant, which controls Tenant, or is under the control of the same entity as 
controls Tenant. For the purposes of the preceding sentence, "control" means 
legal voting control. The consent by Landlord to any assignment or subletting 
shall not constitute a waiver of the necessity for such consent to any 
subsequent assignment or subletting. This prohibition against assigning or 
subletting shall be construed to include a prohibition against any assignment or
subletting by operation of law. If the Leased Premises shall be occupied by 
anybody other than Tenant, Landlord may collect rent from the assignee, under- 
tenant or occupant and apply the net amount collected to the rent herein 
reserved, but no such assignment, underletting, occupancy or collection shall be
deemed a waiver of this covenant, or the acceptance of the assignee, under-
tenant or occupant as tenant, or a release of Tenant from the further 
performance by Tenant of covenants on the part of Tenant herein contained. 
Notwithstanding any assignment or sublease, Tenant shall remain primarily liable
on this Lease and shall not be released from performing any of the terms, 
covenants and conditions of this Lease, but Tenant and such assignee, 
under-tenant or occupant shall thereafter be jointly and severally liable for
the full and faithful performance of the obligations of Tenant under this Lease.
Any attempted assignment by Tenant without the prior written consent of Landlord
shall be void. No assignment or subletting shall provide for a rental payment,
or other payment for use and occupancy or utilization, based in whole or in part
on the net income or profits derived by any person or entity from the property
assigned, subleased, occupied or utilized (other than an amount based upon a
fixed percentage of sales), and any such purported assignment or subletting
based upon such payment shall be void and any amount payable thereunder or any
rental amount therefor passed to any person or entity shall not have deducted
therefrom any expenses or costs related in any way to the leasing of such space.

     12.02  In the event Tenant desires to sublet or assign this Lease in whole 
or in part and the resulting agreement provides the Tenant with any gross profit
in excess of the rents payable hereunder, Landlord shall have the option of 
terminating the Lease and the Tenant shall be relieved of any further liability 
from the date it vacates the premises. Said option shall be exercised by written
notice from Landlord to Tenant within thirty (30) days from date Tenant notifies
Landlord of the terms of the assignment or subleases.

                                     -12-
<PAGE>
 
                                 ARTICLE XIII

                             Default of the Tenant

     13.01  In the event of any failure of Tenant to pay any Basic Minimum 
Annual Rent, Additional Rent or any other monies payable to Landlord under this 
Lease within fifteen (15) days after written notice of failure to pay said sums,
Tenant shall be in material default of the Lease. Tenant shall also be in
material default of this Lease upon the happening of any of the following: (i)
the failure to deliver any estoppel or subordination, non disturbance and/or
attornment agreement within the time limits set forth for default in the Article
of this Lease requiring execution and delivery of such documents; (ii) the
failure to have any mechanic's lien discharged within the time period set forth
for default in the Article requiring removal of mechanic's liens; (iii) the
failure to commence within thirty (30) days after written notice of failure to
perform, and diligently pursue the performance of, any other of the terms,
conditions or covenants of this Lease to be observed or performed by Tenant;
(iv) if Tenant or any guarantor shall become bankrupt or insolvent, or file any
debtor proceedings, or take or have taken against them, in any court, pursuant
to any statute either of the United States or of any State, a petition in
bankruptcy or insolvency or for the reorganization or for the appointment of a
receiver or trustee of all or a portion of Tenant's property or make an
assignment for the benefit of creditors; or (v) if Tenant's interest in this
Lease shall be taken under any writ of execution. The foregoing conditions of
default shall be limited to the extent required by any state or federal laws
affecting this Lease and Landlord's rights against Tenant, including the United
States bankruptcy laws. To the extent permitted by law, all payments are due on
the due dates set forth in the Lease, and there shall be no grace period for the
due date of the rent other than the above 15 day period after notice from
Landlord.

     13.02  In the event of default, then Landlord, besides other rights or 
remedies Landlord may have, shall have the right to terminate this Lease and 
proceed under any law entitling Landlord to recover possession of the Leased 
Premises, and to the extent permitted by law, shall be entitled the right of 
immediate reentry and to eject Tenant from the Project, without resort to court 
proceedings. Upon such default, to the extent permitted by law, Tenant's 
property may be removed and stored in a public warehouse or elsewhere at the 
cost of, and for the account of Tenant. Tenant acknowledges that this Lease is a
commercial Lease, and to the extent permitted by law, Tenant waives the 
requirement of a statutory notice to quit possession prior to commencement of 
summary process proceedings.

     13.03  Should Landlord elect to reenter, as herein provided, or should it 
take possession pursuant to legal proceedings or pursuant to any notice provided
for by law, Landlord may either terminate this Lease or Landlord may from time 
to time, without terminating this Lease, make such alterations and repairs as 
may be necessary in order to relet the Leased Premises, or any part thereof, for
such term or terms (which may be for a term extending beyond the terms of this 
Lease) and at such rental or rentals and upon such other terms and conditions as
Landlord in Landlord's discretion may deem advisable. Upon each such reletting, 
all rentals received by the Landlord from such reletting shall be applied first 
to the payment of any indebtedness other than rent due hereunder from Tenant to 
Landlord; second, to the payment of any costs and expenses of such reletting, 
including brokerage fees and attorney's fees and of costs of such alterations 
and repairs; third, to the payment of rent due and unpaid hereunder, and the 
residue, if any, shall be held by Landlord and applied in payment of future rent
as the same may become due and payable hereunder. If such rentals received from 
such reletting during any month are less than that to be paid during that month 
by Tenant hereunder, Tenant shall pay any deficiency to Landlord. Such 
deficiency shall be calculated and paid monthly.  No such reentry or taking 
possession of the Leased Premises by Landlord shall be construed as an election 
on Landlord's part to terminate this Lease unless a written notice of such 
intention be given to Tenant or unless the termination thereof be decreed by a 
court of competent jurisdiction. Notwithstanding any

                                     -13-
<PAGE>
 
such reletting without termination, Landlord may at any time thereafter elect to
terminate this Lease for such previous breach. Should Landlord at any time 
terminate this Lease for any breach, in addition to any other remedies Landlord 
may have, Landlord may recover from Tenant all damages Landlord may incur by 
reason of such breach, including the cost of recovering the Leased Premises, 
reasonable attorney's fees, and the present value of the lost rent resulting
from the failure of Landlord or Tenant to obtain another Tenant for the Leased
Premises for any period of time after Tenant's default, and/or resulting from
the fact that the reasonable rental value of the Lease Premises at the time of
Tenant's default is less than the value of the remaining rental payments due
under this Lease.

     13.04     In case Landlord shall retain an attorney to enforce the
provisions of this Lease or if suit shall be brought for recovery of possession
of the Leased Premises, for the recovery of rent or any other amount due under
the provisions of this Lease, or because of the breach of any other covenant
herein contained on the part of Tenant to be kept or performed, Tenant shall pay
to Landlord all expenses incurred therefor, including a reasonable attorney's
fee.

                                 ARTICLE XIV 

                               Security Deposit 

                    (this article is intentionally omitted)



                                  ARTICLE XV 

                     Limitation of Liability of Landlord 


     15.01     In the event of any alleged default of Landlord, Tenant agrees 
that Tenant shall not seek to secure any claim for damages or indemnification by
any attachment, garnishment or other security proceeding against any property of
the Landlord other than the Project or property related thereto, and in the 
event Tenant obtains any judgment against Landlord by virtue of an alleged 
default by Landlord under this Lease, Tenant agrees that Tenant will not look to
any property of Landlord other than the Project for satisfaction of such 
judgment. 

     15.02     Unless caused by the gross negligence or wilful misconduct of 
Landlord, Landlord shall not be liable for any damage to property of Tenant or
of others located on the Leased Premises, or for the loss of or damage to any
property of Tenant or of others by theft or otherwise. Unless caused by the
gross negligence or wilful misconduct of Landlord, Landlord shall not be liable
for any injury or damage to persons or property resulting from fire, explosion,
falling plaster, steam, gas, electricity, water, rain or snow or leaks from any
part of the Leased Premises or from the pipes, appliances or plumbing works or
from the roof, street or subsurface or from any other place or by dampness or by
any other cause of whatsoever nature. Landlord shall not be liable for any such
damage caused by other tenants or persons in the Project, by occupants of
adjacent property to the Project, by other members of the public, or caused by
operation or construction of any other private or public work. All property of
Tenant kept or stored on the Leased Premises shall be so kept or stored at the
risk of Tenant only.

     15.03     Upon any transfer of Landlord's interest in the Project, the 
then transferor Landlord shall be relieved of any and all liability to Tenant 
under this Lease, except for claims of Tenant against Landlord arising out of 
events occurring prior to such transfer.

                                     -14-





















<PAGE>
 
                                  ARTICLE XVI

                                Quiet Enjoyment

     16.01     Upon payment by the Tenant of the rents herein provided, and upon
the observance and performance of all the covenants, terms and conditions on
Tenant's part to be observed and performed, Tenant shall peaceably and quietly
hold and enjoy the Leased Premises for the term hereby demised without hindrance
or interruption, subject, nevertheless to the terms and conditions of this
Lease.


                                 ARTICLE XVII
 
                            Miscellaneous Covenants

     17.01     The Landlord and Tenant hereby waive trial by jury in any action,
proceeding or counterclaim brought by either of the parties hereto against the 
other on any matters whatsoever arising out of or in any way connected with this
Lease, the relationship of Landlord and Tenant, Tenant's use or occupancy of the
Leased Premises, and/or claim of injury or damage.  In any dispute between the 
parties relating to the tenancy hereby created, the exclusive forum for any such
legal action shall be the state or federal courthouse in Connecticut nearest the
Leased Premises and having jurisdiction and venue over the matter.  Connecticut
law shall apply to all state law matters arising under this Lease.

     17.02     The waiver by Landlord of any breach by Tenant of any term, 
covenant or condition herein contained shall not be deemed to be a waiver of 
such term, covenant or condition or any subsequent breach of the same or any 
other term, covenant or condition herein contained.  The subsequent acceptance 
of rent hereunder by Landlord shall not be deemed to be a waiver of any
preceding breach by Tenant of any term, covenant or condition of this Lease,
other than the failure of Tenant to pay the particular rental so accepted,
regardless of Landlord's knowledge of such preceding breach at the time of
acceptance of such rent. No covenant, term or condition of this lease shall be
deemed to have been waived by Landlord unless such waiver be in writing by
Landlord.

     17.03     No payment by Tenant or receipt by Landlord of a lesser amount
than the monthly rent herein stipulated shall be deemed to be other than on
account of the earliest stipulated rent, nor shall any endorsement or statement
on any check or any letter accompanying any check or payment as rent be deemed
an accord and satisfaction, and Landlord may accept such check or payment
without prejudice to Landlord's right to recover the balance of such rent or
pursue any other remedy in this Lease provided.

     17.04     This Lease and the Exhibits, attached hereto and forming a part 
hereof, set forth all the covenants, promises, agreements, conditions and 
understandings between Landlord and Tenant concerning the Leased Premises and 
there are no covenants, promises, agreements, conditions or understandings, 
either oral or written, between the parties other than those herein set forth.  
No subsequent alteration, amendment, change or addition to this lease shall be 
binding upon Landlord or Tenant unless reduced to writing and signed by the 
party to be charged.

     17.05     If any term, covenant or condition of this Lease or the 
application thereof to any person or circumstances shall, to any extent, be 
invalid or unenforceable, the remainder of this Lease, or the application of 
such term, covenant or condition to persons or circumstances other than those as
to which it is held invalid or unenforceable, shall not be affected thereby and 
each term, covenant or condition of this Lease shall be valid and enforced to 
the fullest extent permitted by law.

                                     -15-









  
<PAGE>
 
     17.06     If the Commencement Date is not a date certain, the Commencement 
Date shall in no event be later than a time which would not violate any 
applicable rule against perpetuities, determined as if all relevant lives in 
being ceased as of the date of execution of this Lease.

     17.07     In the event that Landlord shall be delayed in, hindered in, or 
prevented from, the performance of any act required hereunder by reason of Force
Majeure, which shall mean strikes, lockouts, labor troubles, inability to
procure materials, failure of power, restrictive governmental laws or 
regulations, riots, insurrection, war or other reason of a like nature not the 
fault of the Landlord and despite his good faith efforts to avoid such Force
Majeure, then performance of such act shall be excused for the period of the
delay.

     17.08     Tenant agrees that the Landlord and Landlord's agents and other 
representatives shall have the right to enter into and upon the Leased Premises 
at all reasonable hours, upon reasonable notice, consistent with Tenant's
security requirements, (without notice in the case of an emergency) for the
purpose of examining the Leased Premises, or making such repairs or alterations
therein as may be necessary for the safety and preservation of the Project. In
the course of any such entry, Landlord will cause the least amount of disruption
to Tenant's business and operations as is reasonably possible.

     17.09     Tenant agrees to permit the Landlord or Landlord's agents to show
the Leased Premises to persons wishing to hire or purchase the same upon 
reasonable notice to Tenant and at reasonable hours.

     17.10     Tenant shall not encumber or obstruct the General Common area in 
the Project, nor allow the same to be obstructed or encumbered in any manner.  
Landlord shall not obstruct the entrance to the Leased Premises and shall not 
unreasonably interfere with Tenant's use of the General Common Area.

     17.11     The submission of this Lease for examination does not constitute 
a reservation of or option for the Leased Premises and this Lease shall become 
effective only upon execution and delivery thereof by Landlord and Tenant.

     17.12     Neither party shall record this Lease, but the parties hereto 
agree to execute a Notice of Lease drawn in accordance with the Connecticut 
statutes, and the parties agree to execute in recordable form an agreement 
establishing the specific commencement date of this Lease when the same is 
ascertainable.

     17.13     If there shall be one or more tenants or one or more landlords, 
each tenant and landlord shall be jointly and severally liable for all of the 
covenants and obligations of the Tenant and Landlord hereunder, as the case may 
be, except as express provision may be elsewhere made to the contrary.

     17.14     The use of the neuter singular pronoun to refer to Landlord or 
Tenant shall be deemed a proper reference even though Landlord or Tenant may be 
an individual, a partnership, a corporation, or a group of two or more 
individuals or corporations. The necessary grammatical changes required to make
the provisions of this Lease apply in the plural sense where there is more than
one Landlord or Tenant, or to either corporations, associations, partnerships,
or individuals, males or females, shall in all instances be assumed as though in
each case fully expressed.

     17.15     The headings, section numbers and article numbers appearing in 
this Lease are inserted only as a matter of convenience and in no way define, 
limit, construe, or describe the scope or intent of such sections or articles of
this Lease nor in any way affect this Lease.

                                     -16-
<PAGE>
 
                                 ARTICLE XVIII

                          Surrender and Holding Over

     18.01  At the expiration of the tenancy hereby created, whether by lapse of
time or otherwise, Tenant shall surrender the Leased Premises in the same 
condition as the Leased Premises were in upon delivery of possession thereto 
under this Lease, reasonable wear and tear and insured casualty excepted, and 
Tenant shall surrender all keys for the Leased Premises to Landlord at the place
then fixed for the payment of rent, and Tenant shall inform Landlord of all 
combinations on locks, safes and vaults, if any, in the Leased Premises. Tenant 
shall remove all its trade fixtures and/or, at the option of the Landlord, any 
alteration or improvements installed by Tenant, before surrendering the premises
as aforesaid and shall repair any damage to the Leased Premises caused thereby. 
Tenant's obligation to observe or perform this covenant shall survive the 
expiration or other termination of the term of this Lease. If Tenant fails to 
remove such trade fixtures and restore the Leased Premises, then upon the 
expiration or sooner termination of this Lease, and upon the Tenant's removal 
from the premises, all such alterations, decorations, additions and improvements
shall become the property of the Landlord.

     18.02  Holding over with the written consent of Landlord shall be at the 
Basic Minimum Annual Rent and the Additional Rent specified herein and shall 
otherwise be on all terms and conditions set forth herein, except for the term, 
which shall be month to month, and without any right of first refusal or options
to extend the term, lease other space and/or purchase property. It is 
acknowledged that the damages which Landlord may suffer on account of an 
unconsented to holding over may be difficult to determine, as they may include 
lost marketing opportunities with respect to Landlord's ability to obtain a 
replacement tenant in a timely manner and other elements of damage that may be 
difficult to quantify. Accordingly, should Tenant withhold possession of the 
premises from Landlord after termination of the within Lease, whether by lapse 
of time, by termination by either party as provided herein, or in any other 
manner, and except in the case where the Landlord has given written consent to 
holding over, the damages to Landlord on account of Tenant's failure to vacate 
on time, plus the use and occupancy for the Leased Premises, are hereby 
liquidated at a monthly sum equal to any installment Additional Rent in effect 
as of the end of the Term (any utility charges and Tenant's Pro Rata Share of 
the Basic Operating Expense, for example) plus one and one-half times the 
monthly installment of Basic Minimum Annual Rent which would have been in effect
for the month immediately prior to the end of the Term of the Lease had the 
Lease run the full course of the Initial Term and any option to extend that may 
have been exercised prior to the unconsented to holding over. Tenant shall also 
be responsible for any other item of Additional Rent which would be owed had the
Lease remained in effect (attorney's fees and damage to Landlord's property, for
example).

                                  ARTICLE XIX

              Construction of Building, Site and Leased Premises

     19.01  The Building and site shall be constructed and improved by Landlord 
in accordance with the site plans and elevational plans entitled "Enterprise III
Building, Enterprise Drive, Shelton, CT, dated October 25, 1996, prepared for 
R.D. Scinto, Inc. by Kasper Group, Inc., Sheet SP-1 and Sheets A-1 through A-5",
and the exterior siding and windows for the Building shall be similar to that of
the neighboring Two Enterprise Drive building (the foregoing Building 
construction and site improvement work herein referred to as the "General 
Construction Work").

     19.02  The interior Leased Premises shall be constructed by Landlord in 
accordance with the Leased Premises Construction Plans (the foregoing Leased 
Premises construction work herein referred to as the "Leased Premises 
Construction Work"). It is acknowledged that as of the date of this Lease,

                                     -17-
<PAGE>
 
the Leased Premises Construction Plans have not been completed. Upon execution 
of this Lease, Tenant shall cooperate with Landlord in developing the Leased 
Premises Construction Plans, such that the same may be finalized within 30 days
after the execution of this Lease. Landlord will provide Tenant with the free of
charge use of Landlord's architectural department for the development of the 
Leased Premises Construction Plans, and Tenant agrees to provide prompt 
turn-around time in making any decisions required of Tenant for the finalization
of the Leased Premises Construction Plans by the above date. The Leased Premises
Construction Plans shall be subject to Landlord's approval, which shall not be 
unreasonably withheld or delayed. Notwithstanding anything in this Lease to the 
contrary, if Landlord shall be delayed in completing work which is Landlord's 
responsibility or if Landlord shall be otherwise delayed in obtaining a 
certificate of occupancy for the Leased Premises, and if such delay is caused by
the failure of Tenant to develop the Leased Premises Construction Plans 
promptly, in the manner provided above, the failure of Tenant to provide 
reasonable turn around time on architectural decisions to be made by Tenant, or 
the failure of Tenant to provide items to the Leased Premises on time which are 
Tenant's responsibility, then the Commencement Date shall be the date on which 
the Leased Premises would have been ready but for the delay due to Tenant.

     19.03     Upon execution of this Lease, Landlord diligently proceed to 
complete the General Construction Work and Leased Premises Construction Work on 
a timetable reasonably calculated to achieve a Commencement Date of October 1, 
1997. All construction work carried out by Landlord shall be carried out in a 
workmanlike manner in compliance with all laws and shall be warranted by 
Landlord for a period of one year from the completion date and any further 
period to the extent of coverage under any manufacturer's warranties.

     19.04     The Commencement Date is the date upon which all of the following
conditions have been met or such earlier date upon which Tenant has moved into 
and begun conducting its business from the Leased Premises: (a) substantial 
completion of the Leased Premises Construction Work; (b) substantial completion 
of those portions of the Project necessary for Tenant's use and enjoyment of the
Leased Premises, including, without limitation, the Common Area of the Building 
serving the Leased Premises, and the drives, parking areas and walkways 
sufficient to provide Tenant with parking for and access to the Leased Premises;
and (c) issuance of a certificate of occupancy by the City of Shelton for the 
Leased Premises. Substantial completion of the Leased Premises Construction Work
shall mean that the work has been completed with the possible exception of punch
list items, whose absence does not materially affect Tenant's ability to conduct
its business in the Leased Premises. Landlord shall tender possession of the 
Leased Premises to Tenant upon the Commencement Date, clean and free of all 
construction debris and personal property other than that belonging to Tenant, 
and shall promptly and diligently pursue the completion of any punch list items.

     19.05     The General Construction Work shall be carried out by Landlord at
Landlord's sole cost and expense. All of the Leased Premises Construction Work 
as is consistent with "Building Standard Work" shall be carried out by Landlord 
at Landlord's sole cost and expense. If the Leased Premises Construction Plans 
call for Landlord to perform any work in excess of Building Standard Work 
("Extra Leased Premises Construction Work"), Tenant be responsible to pay for 
the cost of any Extra Leased Premises Construction Work in installments, as 
Landlord's Overall Construction Work progresses, 1/3 upon delivery of an 
estimate therefore by Landlord, 1/3 upon substantial completion of the 
sheetrock, and 1/3 upon substantial completion of the work. Each progress 
payment is due within 15 days after presentment of an invoice therefor from 
Landlord. Notwithstanding the foregoing, Landlord shall perform and bear the 
cost of the following, at Landlord's sole cost and expense, without any extra 
charge to Tenant: (a) installation in the walls and ceilings of the Leased 
Premises computer network wiring for Tenant's computer system and for Tenant's 
telephone system (the hookup of Tenant's computers and telephones to the 
computer and telephone wire outlets to be Tenant's responsibility); (b) removal 
from 8 Progress Drive of Tenant's telephone switching equipment and 
reinstallation of it in the Leased Premises; (c) the reasonable cost of moving 
Tenant's personal property form its 8
<PAGE>
 
Progress Drive premises to the Leased Premises. "Building Standard Work" is
defined in paragraph 19.07; and (d) providing sufficient power to the Leased
Premises for the operation of Tenant's business in the same character as it is
operated at B Progress Drive, Shelton as of the date of this Lease. The cost for
Extra Leased Premises Construction Work is the cost incurred by Landlord for any
item in excess of the cost of the item of Building Standard Work that it
replaces and the full cost incurred by Landlord for any item that is in addition
to and not in replacement of an item of Building Standard Work.

     19.06 Landlord will, subject to all the covenants, agreements, terms,
provisions and conditions of this Lease give access to the Leased Premises to
decorators and other contractors employed by Tenant for the purpose of making
improvements therein, when so long as, in Landlord's reasonable judgment, the
work to be done in the Leased Premises by Landlord as provided herein shall have
been completed to such an extent that the making of such improvements will not
interfere with or delay Landlord's performance of the remaining portion of its
work; it being understood that Tenant shall not be deemed to have entered into
occupancy of the Leased Premises by reason of the presence in the Leased
Premises of any decorator or other contractor. If at any time such entry shall
cause disharmony, delay or interference with Landlord's performance of the
remaining portion of the work, this license may be withdrawn by Landlord
immediately upon written notice to Tenant.

     19.07 "Building Standard Work" is defined as the following:

          (a)  Partitions of at least 5/8" sheetrock to hung ceiling, mounted on
     steel or wood studs, to provide for the reasonable subdivision of the
     Leased Premises at a rate not exceeding six straight lineal feet of such
     partitioning per 100 square feet of rentable floor area or fraction
     thereof. Sheetrock walls and/or windows shall be provided to all Leased
     Premises boundary walls, and on walls separating other space in the
     building, shall run to structure above ceiling;

          (b)  Doors at least 7'-0" high 3'-0" wide of wood construction, with
     metal frames, including latch sets and doorstops, at the rate of not more
     than one door per 500 square feet of rentable floor area or fraction
     thereof and, in the case of the entrance door to the Leased Premises, one
     lock set and door closer;

          (c)  Flooring: commercial grade carpeting throughout the Leased 
     Premises, consisting of 100% nylon static control, 30 ounce, cut pile, 10 
     year guaranty, Patcraft brand, or equal. Tenant may select rooms in which 
     anti-static vinyl composition tile may be installed in lieu of carpet;

          (d)  Painting of all wall surfaces, doors and trim, included in
     Building Standard Work, with not more than one color in each room, with two
     or three coats as necessary. The colors shall be selected by Tenant from a
     spectrum of colors supplied by Landlord;

          (e)  Electrical distribution system sufficient to provide for a
     lighting load of 2 watts per square foot of useable floor area, or fraction
     thereof, plus an additional electrical load of 2 watts per square foot of
     useable floor area or fraction thereof for electrical receptacles, at the
     rate of not more than one duplex receptacle for each 125 square feet of
     rentable floor area or fraction thereof. Lighting fixtures of not more than
     one building standard fixture (a four 40-watt tube fixture, measuring two
     feet by four feet) per 125 square feet of useable floor area or fraction
     thereof. Light switches provided as per applicable building code. The
     lighting shall also be "energy efficient lighting", as per United
     Illuminating specifications;

                                     -19-
<PAGE>
 
          (f)  Ceiling of 2 foot by 4 foot lay-in suspended acoustical tile with
     medium mineral fissured texture; and

          (g)  Heating, Ventilating and Air Conditioning systems in general
     shall consist of gas heating and electrical cooling. Building standard HVAC
     shall allow the following conditions to be maintained: in the cooling
     season, interior conditions of not more than 78 degrees F. Dry Bulb, and
     50% relative humidity when the outside temperature is no more than 90
     degrees F. Dry Bulb, and 77 degrees F. Wet Bulb; and in the heating season,
     not less than 68 degrees F. Dry Bulb, when the outside temperature is not
     less than 0 degrees F. Dry Bulb. Maintenance of these conditions is
     contingent on the sources of heat within the Leased Premises not exceeding
     one person per 100 square feet of useable floor area, or fraction thereof,
     and four watts of electrical consumption for all purposes, including
     lighting and power, per square foot of useable floor area, or fraction
     thereof. If and to the extent that the sources of heat in the Leased
     Premises exceed the aforesaid design criteria, any additional cost incurred
     by the Landlord in furnishing and operating equipment capable of meeting
     the heating or air conditioning performance criteria set forth above shall
     be reimbursed to Landlord by Tenant.

     19.08 In the event Landlord shall be delayed in obtaining delivery of any
item specially ordered for Tenant's Leased Premises in accordance with Tenant's
finish plans and if such delay shall cause a delay in Landlord's obtaining a
certificate of occupancy, the Commencement Date shall be the date on which
Landlord would have been able to obtain a certificate of occupancy but for the
delay in obtaining the specially ordered item. Landlord shall use best efforts
to obtain prompt delivery of all items required for completion of the Leased
Premises in time to complete the Leased Premises on time. In the event, however,
that Landlord shall foresee difficulty in obtaining timely delivery of any such
specially ordered item referred to above, Landlord shall notify Tenant of this
condition, and Tenant shall have the option of obtaining delivery of said item
through Tenant's own source or replacing the item for which timely delivery is
not obtainable with an item with an earlier delivery date.


                                  ARTICLE XX

                   Rights Of Refusal To Leasing In Building

     20.01 Notice of Bona Fide Offer and Exercise of Refusal Right by Tenant. 
           -----------------------------------------------------------------
Tenant shall have a right of refusal to the leasing of space in the Building to
other tenants, in accordance with the provisions of this Article (the "Refusal
Right to Leasing"). Landlord shall give Tenant a "Notice of Bona Fide Offer"
prior to the initial renting of any space in the Building to another Tenant. The
"Notice of Bona Fide Offer" shall be a Notice to Tenant which sets forth the
terms and conditions of an offer that Landlord has received to rent space to
another party, which terms and conditions are acceptable to Landlord. Tenant may
only exercise Tenant's Refusal Right to Leasing by giving Landlord Notice of
exercise within 10 business days after Landlord's Notice of Bona Fide Offer to
Tenant, which Notice of exercise must unequivocally and unconditionally state:
that Tenant is exercising the Refusal Right to Leasing: and whether Tenant is
electing the "Bona Fide Offer Option" or the "Existing Rent Option" (defined
below). If Landlord's Notice of Bona Fide Offer to Tenant is in the form of a
proposed formal lease and if Tenant seeks to exercise the Refusal Right to 
Leasing with election of the Bona Fide Offer Option, then the exercise shall
only be valid if the Notice of exercise is accomplished by return of the lease,
duly executed by Tenant. Tenant's Refusal Right shall not apply, and Landlord
shall not be obligated to give any Notice of Bona Fide Offer: for any rental to
a tenant after the first renting of any space; and, for any rental to another
tenant on terms not less favorable to Landlord than those contained in any
Notice of Bona Fide Offer in response to which Tenant did not duly exercise
Tenant's

                                     -20-
<PAGE>
 
Refusal Right to Leases. If, in the course of the initial rent-up of said space,
Landlord desires to rent said space on business terms less favorable to Landlord
than those contained in Landlord's original Notice of Bona Fide Offer to Tenant,
the above process shall be repeated. Notwithstanding anything in this Article to
the contrary, Tenant's Refusal Right to Leases shall not be valid unless given
in strict compliance with the requirements of this Article and shall no longer
be in effect if Tenant has been in default of this Lease beyond any applicable
notice and grace period.

     20.02  Bona Fide Offer Option. Tenant's election of the "Bona Fide Offer 
            ----------------------
Option" means that Tenant has elected to accept the same lease terms as are 
contained in Landlord's Notice of bona fide offer and enter into a lease with 
Landlord on said terms, which may contain a different rent, length of term and 
other provisions than those contained in the within Lease. If Landlord's Notice 
of bona fide offer to Tenant is not in the form of a proposed formal lease, then
Landlord may deliver a proposed formal lease to Tenant, embodying the business 
terms contained in the Notice of bona offer, and, in order to keep Tenant's 
exercise of the Right of Refusal to Leasing in effect, Tenant must, within 10 
business days after Tenant's delivery of the proposed lease, return the lease, 
duly executed by Tenant.

     20.03  Existing Rent Option. Tenant's election of the "Existing Rent 
            --------------------
Option" means that Tenant has elected to add the entire space that was subject 
to Landlord's Notice of Bona Fide Offer in manner provided for the "Existing 
Rent Option" in Article XXI. Accordingly, the space would be added at the same 
rental and with all other terms and provisions as are provided in Article XXI.
     

                                  ARTICLE XXI

                           Tenant's Expansion Right

     21.01  Existence Of Tenant's Expansion Right. Tenant shall have a right of
            -------------------------------------
expansion into other space in the Building in accordance with the provisions of 
this Article (the "Expansion Right"). Tenant may exercise Tenant's Expansion 
Right for any space only by giving Landlord Notice of exercise for said space:
prior to the time the space has been the subject of any Notice of Bona Fide
Offer (as defined in paragraph 20.01); or in response to a Notice of Bona Fide
Offer for the space (as defined in paragraph 20.01); or in response to a Notice
of Availability for the space. A "Notice of Availability" is a Notice from
Landlord to Tenant which; must designate the space to which it applies; must
state the Basic Minimum Annual Rent and length of term desired to be offered for
the space by Landlord; may state any maximum level of fit-out at no additional
charge to tenant and any other business term desired to be offered for the space
by Landlord; and may not be given earlier than 9 months prior to the date
Landlord has bona fide reason to believe will be the date said space will become
vacant, after having been rented to another tenant. Landlord shall not be
obligated to give any Notice of Availability for any space in the Building prior
to its initial rental. For the leasing of any space in the Building to a tenant
other than Tenant, subsequent to the initial leasing of the space and with a
commencement date prior to the last year of the Term of this Lease, as long as
this Article XXI Expansion Right is in effect, Landlord shall only be able to
rent such space to such other tenant if Landlord has given Tenant a Notice of
Availability for such space, in which event, Tenant may shall have the right to
Exercise Tenant's Expansion Right for such space pursuant to this Article before
the space is rented to such other tenant, and provided further that the rental
to the other tenant is on terms not less favorable to Landlord than those
contained in Landlord's Notice of Availability to Tenant for the space.
Notwithstanding anything in this Article to the contrary, Tenant's Expansion
Right shall not be valid unless given in strict compliance with the requirements
of this Article and shall no longer be in effect if Tenant has been in default
of this Lease beyond any applicable notice and grace period. Tenant's Notice of
exercise must comply with the following requirements:

          (a)  If the exercise is being made in response to a Notice of Bona 
               Fide Offer,

                                     -21-
<PAGE>
 
     the Notice of exercise shall be deemed to be for all of the space which is 
     the subject of the Notice of Bona Fide Offer and must:

          (i)    be given within 10 business days after Landlord's Notice of
                 Bona Fide Offer; and

          (ii)   state that the exercise is being made for the "Existing Rent 
                 Option" or "Bona Fide Offer Option"; or

          (b)    if the exercise is being made in response to a Notice of 
     Availability, the Notice of exercise must:

          (i)    be given within 10 business days after Landlord's Notice of
                 Availability;

          (ii)   state whether the exercise is being made for the "Existing Rent
                 Option" or the "Availability Terms Option";

          (iii)  designate the portion of the space referenced in the Notice of 
                 Availability to which Tenant is making the exercise; or

          (c)    If the exercise is being made prior to a Notice of Bona Fide
     Offer for the space, the Notice of exercise shall be deemed to be for the
     "Existing Rent Option" and must:

          (i)    be given within prior to the giving of any Notice of Bona Fide 
                 Offer for the space; and

          (ii)   designate the portion of the space for which Tenant is making 
                 the exercise.

     21.02  Finalization of Size and Configuration of Exercised Expansion Space.
            -------------------------------------------------------------------
If Tenant's exercise is pursuant to subparagraphs 21.01 (b) or (c) (in response 
to a Notice of Availability or prior to a Notice of Bona Fide Offer on initial 
rent-up) and Tenant has elected to take less than all of the Expansion Space 
then available to Tenant, Landlord shall have the right to adjust the size and 
perimeter configuration of the space designated by Tenant, but only to the least
degree reasonably determined by Landlord such that the space not taken or rented
by Tenant constitutes a commercially reasonably rentable configuration, with no
material adverse impairment on account of the manner in which it has been
separated from the space to be rented to Tenant.

     21.03  Effect of Type of Exercise. As set forth in paragraph 21.01, 
            --------------------------
Tenant's exercise may have been for any one of the following options: the "Bona 
Fide Offer Option"; the "Existing Rent Option" or the "Availability Terms 
Option". The effect of each of these options is described as follows:

          (a)  The Bona Fide Offer Option means that Tenant has elected to
     accept the terms set forth in Landlord's Notice of Bona Fide Offer to
     Tenant, as provided in Article XX, in which event, the provisions of
     Article XX shall control with respect to Tenant's leasing of the space.

          (b)  The "Existing Rent Option" means, with respect to the space to
     which Tenant's exercise applies: that Landlord shall provide Tenant with
     "Expansion Space Construction Work" in accordance with the provisions of
     paragraph 21.04; the

                                     -22-
<PAGE>
 
     Commencement Date for such space shall be the date the Commencement Date
     would have been for such space had it been a part of the original Leased
     Premises and the Commencement Date had been determined in accordance with
     paragraph 19.04 and 19.02; and, upon the Commencement Date for the
     Expansion Space:

          (i)   the Leased Premises shall be increased by addition of the 
                Expansion Space;

          (ii)  the Basic Minimum Annual Rent shall be increased by the Tenant's
                Net Rentable Area for the Expansion Space multiplied by the per
                square foot rental rate in effect as of the Commencement Date
                for the Expansion Space;

          (iii) the Initial Term of the Lease shall be extended to expire at the
                end 120th full calendar month from and after the Commencement
                Date for the Expansion Space;

          (iv)  Tenant's Net Rentable Area and Tenant's Pro Rata Share shall be
                adjusted for addition of the Tenant's Net Rentable Area of the
                Expansion Space; and

          (v)   any other item based upon the Tenant's Net Rentable Area or 
                Tenant's Pro Rata Share shall be adjusted accordingly.

          (b)   The "Availability Terms Option" means that Tenant has agreed to
     rent the Expansion Space to which Tenant's exercise applies on the same
     business terms contained in Landlord's Notice of Availability on the same
     legal terms as contained in this Lease (which, for example, would not
     include the Article XX or XXI rights, unless contained in Landlord's Notice
     of Availability), and with the further provision that any default by Tenant
     on any lease with Landlord shall constitute a default by Tenant on any
     other lease with Landlord. At any time after election of the Availability
     Terms Option, Landlord may deliver a proposed formal lease to Tenant
     embodying the business and legal terms to apply to the leasing. Tenant
     must, within 10 business days after Landlord's delivery to Tenant of such
     Lease, return the lease, duly executed by Tenant, otherwise Tenant shall
     have no further rights under Article XXI or XX.
     
     21.04  Fit-Out Work To Be Performed By Landlord For Expansion Space. If 
            ------------------------------------------------------------
Tenant has elected the Existing Rent Option, then Tenant shall cooperate with 
Landlord in developing construction plans for the Expansion Space (the
"Expansion Space Construction Plans"), such that the same may be finalized 
within two weeks after finalization of the perimeter configuration of the space 
for which Tenant has exercised the Expansion Right. Landlord will provide Tenant
with the free of charge use of Landlord's architectural department for the
development of the Expansion Space Construction Plans, and Tenant agrees to
provide prompt turn-around time in making any decisions required of Tenant for
the finalization of the Expansion Space Construction Plans by the above date.
The Expansion Space Construction Plans shall be subject to Landlord's approval,
which shall not be unreasonably withheld or delayed. Landlord shall carry out
the construction work for Expansion Space (the "Expansion Space Construction
Work") in the same manner as is provided for the Leased Premises Construction
Work in Article XIX. All of the Expansion Space Construction Work as is
consistent with "Building Standard Work" in Article XIX shall be carried out by
Landlord at Landlord's sole cost and expense. If the Expansion Space
Construction Plans call for Landlord to perform any work in excess of Building
Standard Work ("Extra Expansion Space Construction Work"), Tenant be responsible
to pay for the cost of the same in the same manner as is provided for any Extra
Leased Premises Construction Work
 
                                     -23-
<PAGE>
 
in Article XIX.

     22.05  Rental Adjustment for Expansion Space Added Pursuant to Existing 
            ----------------------------------------------------------------
Rent Option. If any Expansion Space is added to the Leased Premises pursuant to 
- ----------- 
the Existing Rent Option and the Commencement Date for such space occurs at any 
time after the fifth anniversary of the original Commencement Date of this 
Lease, the Basic Minimum Annual Rent for the Leased Premises shall be adjusted 
on the 10th anniversary of the original Commencement Date and every 5 years 
thereafter to an amount equal to the per square foot Basic Minimum Annual Rent 
in effect immediately prior to the adjustment, increased by the percentage 
increase in the CPI over the five year period ending three months immediately
prior to the adjustment date. The "CPI" is defined in paragraph 4.03.

     This agreement shall inure for the benefit and be binding upon the parties 
hereto, their respective heirs, representatives, successors and assigns, except 
where provided to the contrary by express provisions contained herein.

     IN WITNESS WHEREOF, the parties have hereunto set their hands and seals as 
of the day and year first above written.


                                            TranSwitch Corporation

                                            by /s/ Michael McCoy
                                               ----------------------------


                                            Three Enterprise Drive - Shelton LLC

                                            by /s/ Robert D. Scinto
                                               ----------------------------
                                               Robert D. Scinto, a member

                                     -24-
<PAGE>
 
State of _______________________

                                   ss City/Town of __________________________

County of _______________________  


          Personally appeared _________________ , signer and sealer of the 
foregoing instrument, who acknowledged himself to be the ________________ of 
TranSwitch Corporation and the execution to be his or her free act and deed 
and the duly authorized free act and deed of TranSwitch Corporation, before me, 
this ________ day of _________________ 1996.


                                             ________________________________
                                             Commissioner of the Superior
                                             Court/Notary Public


State of Connecticut
         
                                   ss City/Town of Shelton


County of Fairfield


     Personally appeared Robert D. Scinto, signer and sealer of the foregoing 
instrument, who acknowledged himself to be a member of Three Enterprise Drive - 
Shelton LLC and the execution to be his or her free act and deed and the duly 
authorized free act and deed of Three Enterprise Drive - Shelton LLC, before me,
this 2nd day of December 1996.



                                      /s/ Eleanor M. Choate
                                      -------------------------------
                                      Notary Public

                       
                                      Eleanor M. Choate
                                      Notary Public
                                      My Commission Expires July 31, 1998

                                     -25-
<PAGE>
 
                              EXHIBIT A. Sheet 1

TranSwitch Corporation 
Three Enterprise Drive
Shelton, Connecticut


first floor


Leased Premises

<PAGE>
 
                              EXHIBIT A, Sheet 2

TranSwitch Corporation 
Three Enterprise Drive 
Shelton, Connecticut 

second floor 


Leased Premises



                           [FLOOR PLAN APPEARS HERE]
















<PAGE>
 

                                   EXHIBIT B

     All that certain piece or parcel of land, together with the buildings and 
improvements thereon, situated in Shelton, Connecticut and shown and described 
as Lot No. 5 on a certain map entitled, "Section Three Subdivision Plan of 
property on Bridgeport Avenue (Old Route 8) & Commerce Drive, Shelton, 
Connecticut", prepared for Robert D. Scinto by J & D Kasper & Associates
December 6, 1984 and on file in the Shelton Land Records as Map No. 2252.

     Said property is also known as Three Enterprise Drive. 






<PAGE>
 

                                   EXHIBIT C

                             Rules and Regulations

As of the execution of the Lease, the rules and regulations are as follows:

1.   The delivery or shipping of merchandise, supplies and fixtures to and from 
     the Leased Premises and the Project shall be subject to such rules and
     regulations as in the reasonable judgment of the Landlord are necessary for
     the proper operation of the Leased Premises and Project and shall not
     unreasonably interfere with other tenant's use of the Project.

2.   All garbage and refuse shall be kept in the kind of container specified and
     shall be placed outside of the Leased Premises, prepared for collection at 
     the location, in the manner and at the times specified by Landlord.

3.   No aerial shall be erected on the roof or exterior wall of the Leased 
     Premises or in any other area of the Project exterior to the Leased
     Premises without, in each instance, the prior Consent of the Landlord,
     which may be withheld in Landlord's absolute discretion, unless the party 
     installing the aerial shall be entitled to the same under such party's 
     lease. Any aerial so installed without such written consent shall be 
     subject to removal without notice at any time.

4.   No electronic interference shall emanate from the Leased Premises which
     shall interfere with any reception or emission of any other person's
     telephone signal, television signal, radio signal, data signal or
     electricity.

5.   No loud speakers, televisions, phonographs, radios or other devices shall
     be used in a manner so as to be heard or seen outside of the Leased
     Premises without the prior written consent of the Landlord.

6.   To the extent that Tenant has thermostatic control of the temperature in 
     the Leased Premises, Tenant shall keep the Leased Premises at a temperature
     sufficiently high to prevent freezing of water pipes and fixtures.

7.   The plumbing facilities shall not be used for any other purposes than that
     for which they are constructed, and no foreign substance of any kind shall
     be thrown therein, other than objects made for disposal in such plumbing
     facilities. The reasonable expense of any breakage, stoppage, or damage
     resulting from a violation of this provision shall be borne by Tenant who,
     or whose employees, agents or invitees have, caused such damage.

8.   Tenant shall not burn any trash or garbage of any kind in or about the 
     Leased Premises or Project.

9.   Tenant and Tenant's employees and agents shall not solicit business in the
     Parking areas or other General Common Area, nor shall Tenant distribute any
     handbills or other advertising matter in automobiles parked in the parking
     area or other General Common Area.

<PAGE>
 
                                                                    EXHIBIT 21.1
 
                                   SUBSIDIARY
 
                          TranSwitch Europe N.V./S.A.


<PAGE>
 
                                                                   EXHIBIT 23.1
 
                  REPORT AND CONSENT OF INDEPENDENT AUDITORS
 
To the Board of Directors and Shareholders of TranSwitch Corporation:
 
The audits referred to in our report dated February 4, 1998 included the
related financial statement schedule as of December 31, 1997, and for each of
the years in the three-year period ended December 31, 1997, included in the
Company's Annual Report on Form 10-K. This financial statement schedule is the
responsibility of the Company's management. Our responsibility is to express
an opinion on this financial statement schedule based on our audits. In our
opinion, such financial statement schedule, when considered in relation to the
basic consolidated financial statements taken as a whole, presents fairly, in
all material respects, the information set forth therein.
 
We consent to the use of our reports included herein and incorporated by
reference in the Registration Statements of TranSwitch Corporation on Form S-8
(No. 33-94234) and Form S-3 (No. 333-40897), relating to the consolidated
balance sheets of TranSwitch Corporation and subsidiary as of December 31,
1997 and 1996, and the related consolidated statements of operations,
stockholders' equity, and cash flows and related financial statement schedule
for each of the years in the three-year period ended December 31, 1997, which
reports appear in the 1997 Annual Report on Form 10-K of TranSwitch
Corporation.
 
                                                    KPMG Peat Marwick LLP
 
Stamford, Connecticut
March 31, 1998

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997
<PERIOD-START>                              OCT-1-1997              JAN-1-1997
<PERIOD-END>                               DEC-31-1997             DEC-31-1997
<CASH>                                          20,508                  20,508
<SECURITIES>                                     1,110                   1,110
<RECEIVABLES>                                    4,746                   4,746
<ALLOWANCES>                                       218                     218
<INVENTORY>                                      4,812                   4,812
<CURRENT-ASSETS>                                31,773                  31,773
<PP&E>                                           9,539                   9,539
<DEPRECIATION>                                   5,723                   5,723
<TOTAL-ASSETS>                                  36,589                  36,589
<CURRENT-LIABILITIES>                            6,125                   6,125
<BONDS>                                              0                       0
                                0                       0
                                     14,357                  14,357
<COMMON>                                            12                      12
<OTHER-SE>                                      15,792                  15,792
<TOTAL-LIABILITY-AND-EQUITY>                    36,589                  36,589
<SALES>                                          8,334                  27,084
<TOTAL-REVENUES>                                 8,334                  27,084
<CGS>                                            3,249                  15,830
<TOTAL-COSTS>                                    4,921                  18,163
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                   0                       0
<INCOME-PRETAX>                                    433                 (1,873)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                                433                 (1,873)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                       433                 (1,873)
<EPS-PRIMARY>                                     0.04                  (0.15)
<EPS-DILUTED>                                     0.03                  (0.15)
        

</TABLE>


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