PERIPHONICS CORP
424B1, 1996-11-05
TELEPHONE & TELEGRAPH APPARATUS
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<PAGE>

                                                          Pursuant to Rule 424B1
                                                              File No: 333-14803

PROSPECTUS 

                               1,100,000 SHARES

                          -----------
                          Periphonics        LOGO 
                          CORPORATION
                          ------------

                                 COMMON STOCK 


   All of the shares of Common Stock offered hereby are being sold by certain 
stockholders (the "Selling Stockholders") of Periphonics Corporation (the 
"Company"). See "Principal and Selling Stockholders." The Company will not 
receive any proceeds from the sale of shares by the Selling Stockholders. 

   The Company has declared a 2-for-1 stock split in the form of a stock 
dividend, to be paid on October 31, 1996 to holders of record on October 15, 
1996. All share and per share information in this Prospectus has been 
adjusted to reflect this stock dividend. 


   The Company's Common Stock is quoted on the Nasdaq National Market under 
the symbol "PERI." The last sale price for the Common Stock on November 4, 
1996, as reported by the Nasdaq National Market, was $18.625 per share. See 
"Price Range of Common Stock." 


   See "Risk Factors" on page 5 for a discussion of certain factors that 
should be considered by prospective purchasers of the Common Stock offered 
hereby. 

                                    ------ 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND 
   EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE 
     SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES 
        COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS 
          PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A 
                              CRIMINAL OFFENSE. 

===============================================================================
                                                                 Proceeds to 
                                            Underwriting           Selling 
                        Price to Public     Discount (1)      Stockholders (2) 
- ------------------------------------------------------------------------------
Per Share .........        $18.25               $1.05              $17.20 
- ------------------------------------------------------------------------------
Total (3)  ........     $20,075,000          $1,155,000         $18,920,000 
===============================================================================

(1) The Company and the Selling Stockholders have agreed to indemnify the 
    Underwriters against certain liabilities, including liabilities under the 
    Securities Act of 1933, as amended. See "Underwriting." 

(2) Before deducting expenses payable by the Selling Stockholders, estimated 
    at $275,000. 

(3) The Selling Stockholders have granted the Underwriters a 30-day option to 
    purchase up to 165,000 shares, solely to cover over-allotments, if any. 
    See "Underwriting." If all such shares are purchased, the total Price to 
    Public, Underwriting Discount and Proceeds to Selling Stockholders will 
    be $23,086,250, $1,328,250 and $21,758,000, respectively. 

   The Common Stock is offered by the several Underwriters when, as and if 
delivered to and accepted by them and subject to their right to reject orders 
in whole or in part. It is expected that delivery of the certificates for the 
Common Stock will be made on or about November 8, 1996. 


WILLIAM BLAIR & COMPANY                                      DAIN BOSWORTH 
                                                             Incorporated 


               THE DATE OF THIS PROSPECTUS IS NOVEMBER 5, 1996 


<PAGE>

                     DOCUMENTS INCORPORATED BY REFERENCE 

   The following documents previously filed by the Company with the 
Securities and Exchange Commission (the "Commission") are hereby incorporated 
by reference in this Registration Statement: 

       (1) The Company's Annual Report on Form 10-K for the year ended May 31, 
           1996; 
       (2) The Company's Quarterly Report on Form 10-Q for the quarter ended 
           August 31, 1996; 
       (3) The Company's Current Report on Form 8-K filed with the Commission 
           on August 13, 1996; and 
       (4) The description of the Company's Common Stock contained in the 
           Company's Registration Statement on Form 8-A, as filed with the 
           Commission on February 21, 1995. 

   All documents subsequently filed by the Registrant pursuant to Sections 
13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this 
Registration Statement and prior to the filing of a post-effective amendment 
which indicates that all securities offered have been sold or which removes 
from registration all securities then remaining unsold, shall be deemed to be 
incorporated by reference into this Registration Statement and to be a part 
hereof from the date of filing of such documents. Any statement contained in 
a document incorporated or deemed to be incorporated by reference herein 
shall be deemed to be modified or superseded for purposes of this 
Registration Statement to the extent that a statement contained herein or in 
any other subsequently filed document which also is or is deemed to be 
incorporated by reference herein modifies or supersedes such statement. Any 
such statement so modified or superseded shall not be deemed, except as so 
modified or superseded, to constitute a part of this Registration Statement. 

   The Company undertakes to provide without charge to each person to whom a 
Prospectus is delivered, upon oral or written request of such person, a copy 
of any document that has been incorporated in this Prospectus by reference. 
Requests for such documents should be directed to the Company at its offices 
located at 4000 Veterans Memorial Highway, Bohemia, New York 11716 (telephone 
number (516) 468-9000), Attention: Secretary. 

                                    ------ 

   IN CONNECTION WITH THIS OFFERING, CERTAIN UNDERWRITERS AND SELLING GROUP 
MEMBERS (IF ANY) OR THEIR RESPECTIVE AFFILIATES MAY ENGAGE IN PASSIVE MARKET 
MAKING TRANSACTIONS IN THE COMMON STOCK ON THE NASDAQ NATIONAL MARKET IN 
ACCORDANCE WITH RULE 10b-6A UNDER THE SECURITIES EXCHANGE ACT OF 1934. SEE 
"UNDERWRITING." 

   IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR 
EFFECT TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE 
COMMON STOCK OF THE COMPANY AT A LEVEL ABOVE THAT WHICH MIGHT OTHERWISE 
PREVAIL IN THE OPEN MARKET. SUCH STABILIZING, IF COMMENCED, MAY BE 
DISCONTINUED AT ANY TIME. 

                                      2 
<PAGE>

                              PROSPECTUS SUMMARY 

   The following summary is qualified in its entirety by the more detailed 
information and financial statements and notes thereto appearing elsewhere or 
incorporated by reference in this Prospectus. All information in this 
Prospectus has been adjusted to reflect a 2-for-1 split of the Common Stock 
in the form of a stock dividend to be paid on October 31, 1996 to holders of 
record on October 15, 1996. Unless otherwise indicated, all information in 
this Prospectus assumes no exercise of the Underwriters' over-allotment 
option. This Prospectus contains or incorporates by reference forward-looking 
statements that involve risks and uncertainties. Such forward-looking 
statements include, but are not limited to, the Company's expectations 
regarding its future financial condition and operating results, product 
development, business strategy, market conditions and competitive 
environment. The Company's actual results could differ materially from those 
anticipated in these forward-looking statements as a result of certain 
factors, including those set forth under "Risk Factors" and elsewhere in this 
Prospectus. 

                                 THE COMPANY 

   Periphonics develops, builds, markets and supports high performance, 
automated interactive transaction processing systems that facilitate 
interaction with computer databases using a touch-tone telephone, speech 
input and output, Web browsers and fax output. The Company's interactive 
voice response ("IVR") and transaction processing systems are based on 
industry-standard, open architecture computer hardware and operating system 
software which, in combination with its own proprietary technology, address 
the needs of mid-size and large scale customer installations. The Company is 
an established leader within the mid-size and large scale segments of the IVR 
industry, having installed systems with over 150,000 ports since 1988, and 
with over 25 years of experience serving the IVR market. The Company's 
systems enable callers to use a touch-tone telephone to access information in 
an organization's computer database for a variety of transactions including 
accessing bank, mutual fund, or brokerage account data; checking the status 
of insurance claims or tax filings; obtaining loan or credit card rates; 
registering for college courses; and retrieving descriptions of products or 
services. 

                                 THE OFFERING 

<TABLE>
<CAPTION>
<S>                                                     <C>
Shares Offered by the Selling Stockholders  ..........  1,100,000 shares 
Shares Outstanding Immediately After the Offering  ...  13,625,132 shares (1) 
Nasdaq National Market Symbol  .......................  PERI 
Proceeds  ............................................  The Company will not receive any 
                                                        proceeds of the offering. 

</TABLE>

- ------ 
(1) Excludes (i) 136,832 shares of Common Stock issuable upon the exercise of 
    outstanding options granted by the Company under its 1986 Incentive Stock 
    Option Plan (the "1986 Plan") at exercise prices between $0.75 and $1.67 
    per share; (ii) 1,200,000 shares of Common Stock reserved for issuance 
    under the Company's 1995 Stock Option Plan, of which options to purchase 
    536,200 are outstanding at exercise prices between $7.00 and $18.00 per 
    share; and (iii) 200,000 shares of Common Stock reserved for issuance 
    under the Company's 1995 Non-Employee Director Stock Option Plan, of 
    which options to purchase 50,000 shares are outstanding at exercise 
    prices between $8.87 and $13.25 per share. See "Description of Capital 
    Stock." 

                                      3 
<PAGE>

                  SUMMARY CONSOLIDATED FINANCIAL INFORMATION 
                    (IN THOUSANDS, EXCEPT PER SHARE DATA) 

<TABLE>
<CAPTION>
                                                                                                 Three Months Ended          
                                                    Fiscal Year Ended May 31,                         August 31, 
                                    ----------------------------------------------------------  ---------------------- 
                                      1992        1993         1994      1995(1)       1996        1995         1996 
                                    ---------   ---------    ---------   ---------   ---------   ---------    --------- 
<S>                                    <C>         <C>          <C>         <C>         <C>         <C>          <C>               
Statement of Earnings Data:       
   Total revenues ..............   $33,703     $39,398      $51,485     $64,777     $88,803     $17,544      $23,259 
   Gross profit ................    17,444      18,971       25,084      32,704      45,049       8,869       11,933 
   Earnings from operations ....     2,820       1,503        4,874       6,874      14,529       2,392        3,348 
   Net earnings ................     1,469         543        1,951       3,184       9,215       1,450        2,315 
   Net earnings per common and    
     common equivalent share      
     (2)(3)  ...................   $  0.16     $  0.05      $  0.21     $  0.33     $  0.69     $  0.12      $  0.17 
   Weighted average common and    
     common equivalent shares     
     outstanding (2)(3)  .......     9,330       7,864        9,228       9,778      13,260      12,558       13,982 
                               
</TABLE>

<TABLE>
<CAPTION>
                                                              August 31, 1996 
                                                              --------------- 
<S>                                                            <C>
Balance Sheet Data: 
   Working capital .......................................        $50,088 
   Total assets ..........................................         78,555 
   Total debt ............................................          -- 
   Common stockholders' equity                                     61,222 
</TABLE>

- ------ 
(1) On February 1, 1995, the Company accelerated the vesting of all 
    outstanding stock options under its 1986 Incentive Stock Option Plan (the 
    "1986 Plan"), thereby allowing all such options to be fully vested at 
    such date. The Company also relinquished its right to repurchase shares 
    obtained by employees under the 1986 Plan. As a result, the Company 
    recorded a nonrecurring, non-cash compensation charge of approximately 
    $1.25 million, or $0.13 per share. 

(2) On September 20, 1996, the Board of Directors approved a two-for-one 
    stock split of the Company's Common Stock in the form of a stock dividend 
    to be paid on October 31, 1996 to holders of record at the close of 
    business on October 15, 1996. Earnings per common and common equivalent 
    share and weighted average number of common and common equivalent shares 
    outstanding have been adjusted to reflect the stock split. 

(3) Net earnings per common and common equivalent share has been computed by 
    dividing net earnings, after reduction for preferred stock dividends, 
    when applicable, by the weighted average number of common shares and 
    common equivalent shares outstanding. Common equivalent shares included 
    in the computation represent common shares and equivalent shares 
    attributable to convertible preferred stock, when applicable, and 
    dilutive common equivalent shares from stock options (using the treasury 
    stock method). 

                                      4 
<PAGE>

                                 RISK FACTORS 

   In addition to the other information contained or incorporated by 
reference in this Prospectus, the following investment considerations should 
be considered carefully by prospective investors in evaluating the Company, 
its business and an investment in the shares of Common Stock offered by this 
Prospectus. This Prospectus contains or incorporates by reference 
forward-looking statements which involve risks and uncertainties. Such 
forward-looking statements include, but are not limited to, the Company's 
expectations regarding its future financial condition and operating results, 
product development, business strategy, market conditions and competitive 
environment. The Company's actual results could differ materially from those 
anticipated in such forward-looking statements as a result of certain 
factors, including those set forth in the following risk factors and 
elsewhere in this Prospectus. 

   Variability of Quarterly Results; Limited Backlog. The Company's quarterly 
operating results may fluctuate as a result of a variety of factors, 
including the length of the sales cycle, the timing of orders from and 
shipments to customers, delays in development and customer acceptance of 
custom software applications, product development expenses, new product 
introductions or announcements by the Company or its competitors, levels of 
market acceptance for new products and the hiring and training of additional 
staff as well as general economic conditions. Historically, the size and 
timing of the Company's sales transactions, including international sales, 
have varied substantially from quarter to quarter, and the Company expects 
such variations to continue in future periods. The Company is typically able 
to deliver an IVR system within 60 days of receipt of the order and 
therefore, does not customarily have a significant long-term backlog. Because 
a significant portion of the Company's overhead is fixed in the short-term, 
the Company's results of operations may be materially adversely affected if 
revenues fall below the Company's expectations. During the fiscal year ended 
May 31, 1996, 30.1% of the Company's system sales and 37.3% of the Company's 
net earnings occurred in the Company's fourth fiscal quarter. Generally, the 
Company's inventory of computer hardware is determined by the Company's 
forecasts of sales during future periods. If management's forecasts of 
product sales and product mix prove to be substantially inaccurate, the 
Company may not have the necessary inventory available to deliver systems in 
a timely manner which may have a material adverse effect on the Company's 
results of operations during such period. 

   Highly Competitive Market Environment. The market for IVR and automated 
transaction processing systems is highly competitive. Certain of the 
Company's competitors have substantially greater financial, technical, 
marketing and sales resources than the Company. There can be no assurance 
that the Company's present or future competitors will not exert increased 
competitive pressures on the Company. In particular, the Company may in the 
future experience pricing pressures as the markets in which it competes 
mature, as new technologies are introduced or for other reasons, and such 
price competition could adversely affect the Company's market share and 
results of operations. In addition, many suppliers of voice mail systems and 
telecommunications systems have added IVR capabilities to some of their 
product offerings and offer IVR systems as a component or add-on of an 
overall sale of a voice mail system or a telecommunications switch. The 
Company also competes with providers of internet-based systems for 
transaction processing applications. Such internet-based systems may provide 
an alternative means of allowing customers to interact with computer-based 
information, thereby reducing the need for the Company's systems in certain 
markets. Although the Company believes it has certain marketing, technical 
and other advantages over many of its competitors, maintaining such 
advantages will require continued investment by the Company in product 
innovation and development, as well as in sales, marketing and customer 
support. There can be no assurance that the Company will be successful in 
such efforts. If the Company is unable to maintain such advantages, it may 
have a material adverse effect on the Company's results of operations. 

   Risk of Rapid Technological Change and New Product Introduction. The 
market for IVR and automated transaction processing systems is characterized 
by rapid continual technological change and improvements in hardware and 
software technology and in the features and capabilities of these systems. 
The Company's future success depends upon its ability to introduce new 
products and to add new features and enhancements to its existing systems 
that keep pace with technological and market developments, and that address 
the increasingly sophisticated and demanding needs of its customers. In order 
to remain competitive, the Company expects to continue to expend significant 
resources for research and development. 

                                      5 
<PAGE>

There can be no assurance that the Company will be successful in developing 
and marketing, on a timely basis, product modifications or enhancements or 
new products that respond to technological advances by others, or that such 
new or enhanced products or features will adequately and competitively 
address the needs of the marketplace. 

   A portion of the Company's IVR systems sales depends, in part, upon 
customers' belief that the Company's UNIX and RISC-based systems offer more 
performance, features and benefits than PC-based systems offered by certain 
of the Company's competitors. As PC hardware and operating system software 
become more powerful, however, the capabilities of PC-based IVR systems are 
likely to increase and may become increasingly competitive alternatives to 
the Company's products in mid-size and large scale installations. 

   The Company's software products, like software programs generally, may 
contain undetected errors or bugs when introduced, or as new versions are 
released. While the Company's current products have not experienced 
post-release software errors that have had a significant financial or 
operational impact on the Company, there can be no assurance that such 
problems will not occur in the future, particularly as the Company's systems 
continue to become more complex and sophisticated. Such defective software 
may result in loss of or delay in market acceptance of the Company's 
products, warranty liability or product recalls. 

   Risk of International Sales. System sales to customers outside the U.S. 
accounted for approximately 34%, 35%, 36% and 26% of the Company's total 
system sales in the fiscal years ended May 31, 1994, 1995 and 1996 and the 
three months ended August 31, 1996, respectively. System sales to customers 
outside the United States, as a percentage of the Company's overall sales, 
fluctuate signficantly on a quarterly basis, and the percentage of such sales 
in a particular quarter may not be indicative of the percentage of 
international sales for the full fiscal year. The Company's international 
business is subject to a number of risks, including compliance with special 
national telecommunications standards and regulatory requirements, export 
regulations, currency exchange rates, tariffs and other barriers, 
difficulties in staffing and managing foreign subsidiary operations, 
potentially adverse tax consequences, longer payment cycles, greater 
difficulty in accounts receivable collections and specialized inventory 
requirements applicable to particular foreign countries. There can be no 
assurance that these factors will not have an adverse impact on the Company's 
future international sales or operating results. The Company does not 
currently engage in international currency hedging transactions. To the 
extent the Company is unable to match revenue received in foreign currencies 
with expenses paid in the same currency, it is exposed to possible losses on 
international currency transactions. Included in the Company's net earnings 
of $9.2 million for the fiscal year ended May 31, 1996 was a foreign exchange 
loss of approximately $0.3 million. Such foreign exchange loss consisted 
primarily of unrealized foreign exchange gains and losses resulting from the 
currency remeasurement of the financial statements (primarily inventories, 
accounts receivable and intercompany debt) of the Company's foreign 
subsidiaries into U.S. dollars. 

   Risk of Industry Concentration. In fiscal 1996 and for the three months 
ending August 31, 1996, approximately 37% and 24% of the Company's worldwide 
system sales were to customers in the telecommunications industry and 36% and 
33% of system sales were to U.S. customers within the financial services 
industry. Although the Company is broadening its vertical market focus to 
include additional industries such as government, higher education, 
healthcare services, transportation, electric and water utilities and 
distribution companies, it expects that it will continue to derive a 
substantial percentage of its system sales from telecommunications and 
financial services businesses. Accordingly, unfavorable economic conditions 
or factors that relate to these industries, particularly any such conditions 
that might result in reductions in capital expenditures by the Company's 
target customers, could have a material adverse affect on the Company's 
results of operations. The Company believes that in recent periods certain of 
its competitors have experienced results below their expectations 
particularly with respect to certain of their telecommunications customers. 
There can be no assurance that the Company will not experience similar 
difficulties with its telecommunications customers (or other vertical market 
customers) in future periods. During fiscal 1996 and the three months ended 
August 31, 1996, sales to governmental customers represented 13% and 25%, 
respectively, of system sales. The system sales to governmental customers in 
the three months ended August 31, 1996 reflect the delivery in that quarter 
of an unusually large system to one governmen-

                                      6 
<PAGE>

tal customer. System sales to any particular vertical market fluctuate as a 
percentage of total sales from quarter to quarter. As such, the percentage of 
sales to any particular vertical market in any given quarter may not be 
indicative of the percentage of sales for the full fiscal year. Future 
reductions in the budgets of government entities could result in reductions 
in capital expenditures by these potential customers. In addition, the 
Company has experienced longer payment cycles with its government customers 
than it typically has with customers in other vertical markets. 

   Limited Protection of Proprietary Technology. The Company's success is 
heavily dependent upon its proprietary software technology. The Company has 
no patents; consequently it relies on a combination of copyright, trademark 
and trade secret laws, employee and third-party non-disclosure agreements, 
and license agreements to protect its proprietary software technology. 
Nonetheless, there can be no assurance that the steps taken by the Company to 
protect its proprietary rights will be adequate to prevent misappropriation 
of such rights or that third parties will not independently develop 
functionally equivalent or superior software technology. The Company from 
time to time receives correspondence alleging that its products may infringe 
patents held by third parties. The Company believes that its products and 
other proprietary rights do not infringe the proprietary rights of third 
parties. There can be no assurance, however, that third parties will not 
assert infringement claims against the Company in the future or that any such 
claims will not require the Company to enter into license arrangements or 
result in protracted and costly litigation, regardless of the merits of such 
claims. There also can be no assurance that the Company will be able to 
obtain licenses to disputed third party technology or that such licenses, if 
available, would be available on commercially reasonable terms. The Company 
is aware that certain segments of the voice processing industry, particularly 
voice mail/voice messaging systems, are affected by active and costly 
litigation. There can be no assurance that as the Company's interactive 
transaction processing systems evolve and provide features which extend their 
uses and capabilities, possibly to include certain voice mail/voice messaging 
and/or additional internet-related features, the Company will not become 
involved in, or otherwise be affected by, litigation which may or may not be 
meritorious. 

   Dependence on Suppliers. In certain instances, despite the availability of 
multiple supply sources, the Company elects to procure certain components or 
parts from a single source to maintain quality control or to develop a 
strategic relationship with a supplier. Although the Company has entered into 
long-term supply contracts with certain of its vendors, the Company has no 
assurance that components and parts will be available as required, or that 
prices of such components and parts will not increase. In certain instances 
the manufacture of components used by the Company in its products has been 
discontinued by suppliers and the Company has been required to seek 
functionally similar substitutes or substantially increase its inventories of 
these discontinued components for its future use. If the Company were to 
experience significant delays, interruptions, discontinuations or reductions 
in the supply of certain components and parts purchased from suppliers, the 
Company's results of operations could be materially adversely affected. 

   Dependence on Key Personnel. The Company's success during the foreseeable 
future will depend largely upon the continued services of its executive 
officers, each of whom has entered into an employment agreement with the 
Company. Each employment agreement contains non-competition covenants that 
extend for a period of up to two years following termination of employment. 
The Company does not have key-man life insurance on its executive officers. 
The Company's success also depends in part on its ability to attract and 
retain qualified managerial, technical and sales and marketing personnel. The 
Company's results of operations could be materially adversely affected if the 
Company were unable to attract, hire, assimilate and train these personnel in 
a timely manner. 

   Anti-Takeover Provisions and Rights Plan. Certain "anti-takeover" 
provisions of the Delaware General Corporation Law, among other matters, 
restrict the ability of certain stockholders to effect a merger or business 
combination or obtain control of the Company. In addition, the Company's 
By-Laws provide for a classified Board of Directors with staggered three-year 
terms. The Company has an authorized class of 1,000,000 shares of preferred 
stock, which may be issued by the Board of Directors on such terms and with 
such rights, preferences and designations as the Board of Directors may 
determine, without further stockholder action. Issuance of such preferred 
stock, depending upon the rights, preferences 

                                      7 
<PAGE>

and designations thereof, may have the effect of delaying, deferring or 
preventing a change in control of the Company. On July 15, 1996, the Board of 
Directors of the Company approved a Rights Plan designed to protect 
stockholders in the event of an unsolicited attempt to acquire the Company, 
including a gradual accumulation of shares in the open market, a partial or 
two-tier tender offer that does not treat all stockholders equally, and other 
takeover tactics which the Board of Directors believes may be abusive and not 
in the best interests of stockholders. The implementation of the Rights Plan 
increases the Board of Directors' power in the event of an unsolicited 
proposal by giving the Board of Directors more time and the opportunity to 
evaluate an offer and exercise its good faith business judgment to take 
appropriate steps to protect and advance stockholder interests by negotiating 
with the bidder, auctioning the Company, implementing a recapitalization or 
restructuring designed as an alternative to the offer, or taking other 
action. 

   Potential Volatility of Stock Price. The market price of the shares of the 
Company's Common Stock may be highly volatile. Factors such as fluctuations 
in the Company's quarterly operating results, announcements of technological 
innovations or new commercial products by the Company or its competitors, and 
conditions in the markets in which the Company and its customers compete may 
have a significant effect on the market price and marketability of the Common 
Stock. Prices for many technology company stocks, including the Common Stock, 
may fluctuate widely as a result of the factors cited above or for reasons 
that are not directly related to the operating performance of such companies, 
including general fluctuations in stock prices and changes in earnings 
estimates or recommendations by securities analysts. See "Price Range of 
Common Stock." 

                                      8 
<PAGE>

                                 THE COMPANY 

   Periphonics develops, builds, markets and supports high performance, 
automated interactive transaction processing systems that facilitate 
interaction with computer databases using a touch-tone telephone, speech 
input and output, Web browsers and fax output. The Company's interactive 
voice response ("IVR") and transaction processing systems are based on 
industry-standard open architecture computer hardware and operating system 
software which, in combination with its own proprietary technology, address 
the needs of mid-size and large scale customer installations. The Company is 
an established leader within the mid-size and large scale segments of the IVR 
industry, having installed systems with over 150,000 ports since 1988, and 
with over 25 years of experience serving the IVR market. The Company's 
systems enable callers to use a touch-tone telephone to access information in 
an organization's computer database for a variety of transactions including 
accessing bank, mutual fund, or brokerage account data; checking the status 
of insurance claims or tax filings; obtaining loan or credit card rates; 
registering for college courses; and retrieving descriptions of particular 
products or services. 

   Periphonics focuses its resources on the needs of specific vertical 
markets in North America including telecommunications, financial services, 
government and higher education and on selected international markets. This 
focus enables the Company to demonstrate its commitment to these markets and 
to identify and offer new features and services that meet the changing IVR 
and transaction processing needs of those market segments. Periphonics 
systems have been implemented by a wide variety of customers including many 
of the major telecommunications and financial services companies worldwide. 
The Company markets its products through direct sales, marketing and 
pre-sales technical support personnel deployed in 15 cities across the U.S., 
as well as in Canada, Mexico, Germany, the United Kingdom and Singapore. 

   IVR and automated transaction processing systems represent an increasingly 
important element in the telecommunications and data processing 
infrastructure for many customer service-oriented organizations. These 
systems enable businesses and other organizations to offer their customers 
24-hour access to information, to provide new revenue generating services, to 
better utilize the capabilities and capacities of their telephone and 
computer systems, to increase the productivity of their customer support 
staffs and to thereby offer better services to customers in less time and at 
a lower cost. 

   Based on information available from Dataquest, the Company believes that 
sales of IVR systems in the United States have grown at a compound annual 
rate of 19% from approximately $475 million in 1991 to approximately $939 
million in 1995. The Company believes that sales of mid-to-large scale IVR 
systems have grown at least as fast as the overall market during this period 
and that the growth in the sale of IVR systems has been due to several 
factors, including improvements in product features, public acceptance of IVR 
systems as a means for obtaining information or executing transactions, and 
competitive pressures on organizations to offer improved customer service 
while reducing costs. 

   The Company's products consist of a family of scalable systems called the 
VPS Series, which can be configured for small (4-16 ports), mid-size (20 to 
128 ports) and large scale installations (up to 960 ports) or as a network of 
multiple systems configured to handle thousands of telephone ports. 
Periphonics has developed its systems to run on industry-standard RISC-based 
hardware and the UNIX operating system in order to take advantage of the 
continual performance improvements and price reductions of industry-standard 
computer systems. This allows the Company to focus its product development 
efforts on expanding its systems' IVR and transaction processing features and 
interfaces to a broad array of telephone switches and mainframe and 
client/server computer and database systems. The highly scalable architecture 
of the Company's systems readily accommodates expansion and upgrades while 
preserving a customer's original investment and extending the useful life of 
installed systems. 

   Most IVR installations require customized application software. Therefore, 
Periphonics maintains a skilled staff of programmers which utilizes proven 
project-management techniques to develop customer applications in a timely 
and economical manner. This is often an important factor in the Company's 
selection as the supplier of large scale, turnkey IVR systems. The Company 
also licenses its software tools to support customers that develop 
application programs with their own staff. Reflecting the mission-critical 

                                      9 
<PAGE>

nature of many of the applications based on the Company's IVR products, 
Periphonics offers direct maintenance and support services 24-hours per day. 
The Company believes that it has one of the largest technical support and 
field service organizations dedicated solely to IVR maintenance. 

   The Company's principal facilities and executive offices are located at 
4000 Veterans Memorial Highway, Bohemia, New York 11716, its telephone number 
is (516) 468-9000 and its web-site address is www.peri.com. Information 
contained in the Company's Web site shall not be deemed to be a part of this 
Prospectus. 

                               USE OF PROCEEDS 

   The Company will not receive any of the proceeds from the sale of the 
Common Stock by the Selling Stockholders. See "Principal and Selling 
Stockholders." 

                         PRICE RANGE OF COMMON STOCK 

   The Company's Common Stock is traded on the Nasdaq National Market under 
the symbol "PERI." The following table sets forth, for the periods indicated, 
the range of high and low sale prices, by quarter, for the Common Stock as 
reported by the Nasdaq National Market. 

<TABLE>
<CAPTION>
                                                            Price Range 
                                                    ------------------------- 
                                                       High             Low 
                                                     --------          ------- 
<S>                                                 <C>                <C>
Fiscal 1995 
Fourth Quarter Ended May 31, 1995  .........          $ 8 5/8          $ 7 3/8 
Fiscal 1996 
First Quarter Ended August 31, 1995  .......           12 1/4            7 3/8 
Second Quarter Ended November 30, 1995  ....           14 3/4           11 3/4 
Third Quarter Ended February 29, 1996  .....           13 7/8           10 1/2 
Fourth Quarter Ended May 31, 1996  .........           18               10 3/8 
Fiscal 1997 
First Quarter Ended August 31, 1996  .......           20 1/8           12 7/8 
Second Quarter (through November 4, 1996)  .           21               16 1/2 

</TABLE>

   All sales prices have been adjusted to reflect the 2-for-1 stock split to 
be effected as a stock dividend payable on October 31, 1996 to shareholders 
of record on October 15, 1996. 


   On November 4, 1996, the last reported sale price of the Company's Common 
Stock as reported on the Nasdaq National Market was $18.625, as adjusted to 
reflect the 2-for-1 stock dividend payable on October 31, 1996. 


                               DIVIDEND POLICY 

   Since its initial public offering in 1995, the Company has not paid cash 
dividends on its Common Stock and does not anticipate paying cash dividends 
in the foreseeable future. The Company currently intends to retain its 
earnings to finance future growth of its business. 

                                      10 
<PAGE>

                     SELECTED CONSOLIDATED FINANCIAL DATA 

   The following selected consolidated financial data as of and for each of 
the five fiscal years in the period ended May 31, 1996 has been derived from 
the audited consolidated financial statements of the Company. The report of 
Deloitte & Touche LLP, independent auditors, as of May 31, 1995 and 1996, and 
for each of the three years in the period ended May 31, 1996 is included in 
the Form 10-K for the year ended May 31, 1996, incorporated by reference 
herein. 

   The selected consolidated financial data for the three month periods ended 
August 31, 1995 and 1996 are derived from the unaudited consolidated 
financial statements of the Company. In the opinion of management, the 
unaudited consolidated financial statements have been prepared on the same 
basis as the audited consolidated financial statements and include all 
adjustments, consisting only of normal recurring adjustments, necessary for a 
fair presentation of the financial position and results of operations for 
such periods. Results for the three months ended August 31, 1996 are not 
necessarily indicative of the results to be expected for the fiscal year 
ending May 31, 1997. The selected consolidated financial data should be read 
in conjunction with and is qualified in its entirety by, the Company's 
consolidated financial statements, related notes and other financial 
information included in the Form 10-K for the year ended May 31, 1996, and 
the Form 10-Q for the quarter ended August 31, 1996 incorporated by reference 
herein. 

<TABLE>
<CAPTION>
                                                                                                       Three Months Ended 
                                                         Fiscal Year Ended May 31,                         August 31, 
                                         ----------------------------------------------------------  ---------------------- 
                                           1992        1993         1994        1995        1996        1995         1996 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
                                                               (in thousands, except per share data) 
<S>                                      <C>         <C>          <C>         <C>         <C>         <C>          <C>
Statement of Earnings Data: 
System sales  ........................    $24,787     $29,906     $41,192     $51,747      $71,800     $13,887     $17,755 
Service revenues  ....................      8,916       9,492      10,293      13,030       17,003       3,657       5,504 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
 Total revenues  .....................     33,703      39,398      51,485      64,777       88,803      17,544      23,259 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Cost of system sales  ................     10,055      13,677      18,653      23,686       32,798       6,408       8,022 
Cost of service revenues  ............      6,204       6,750       7,748       8,387       10,956       2,267       3,304 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
 Total cost of revenues  .............     16,259      20,427      26,401      32,073       43,754       8,675      11,326 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Gross profit  ........................     17,444      18,971      25,084      32,704       45,049       8,869      11,933 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Selling, general and administrative  .     11,309      13,062      15,249      18,749       22,587       4,865       6,165 
Research and development  ............      3,315       4,406       4,961       5,831        7,933       1,612       2,420 
Non-recurring, noncash compensation 
  charge (1) .........................         --          --          --       1,250           --          --          -- 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
 Total operating expenses  ...........     14,624      17,468      20,210      25,830       30,520       6,477       8,585 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Earnings from operations  ............      2,820       1,503       4,874       6,874       14,529       2,392       3,348 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Interest expense  ....................       (617)       (673)       (936)       (992)          --          --          -- 
Interest and other income  ...........        242         117         159         170          885         191         329 
Foreign exchange gain (loss)  ........         22         175        (464)         88         (345)       (125)        118 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
 Total other (expenses) income  ......       (353)       (381)     (1,241)       (734)         540          66         447 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Earnings before provision for income 
  taxes and cumulative effect of 
  change in accounting principle .....      2,467       1,122       3,633       6,140       15,069       2,458       3,795 
Provision for income taxes  ..........        998         579       1,599       2,956        5,854       1,008       1,480 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Earnings before cumulative effect of 
  change in accounting principle .....      1,469         543       2,034       3,184        9,215       1,450       2,315 
Cumulative effect of change in 
  accounting principle (2) ...........         --          --          83          --           --          --          -- 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Net earnings  ........................    $ 1,469     $   543     $ 1,951     $ 3,184      $ 9,215     $ 1,450     $ 2,315 
                                         =========   =========    =========   =========   =========   =========    ========= 
Earnings per common and common 
  equivalent share (3)(4): 
Earnings before cumulative effect of 
  change in accounting principle .....    $  0.16     $  0.05     $  0.22     $  0.33      $  0.69     $  0.12     $  0.17 
Cumulative effect of change in 
  accounting principle (2) ...........         --          --       (0.01)         --           --          --          -- 
                                         ---------   ---------    ---------   ---------   ---------   ---------    --------- 
Earnings per common share  ...........    $  0.16     $  0.05     $  0.21     $  0.33      $  0.69     $  0.12     $  0.17 
                                         =========   =========    =========   =========   =========   =========    ========= 
Weighted average number of common and 
  common equivalent shares (3)(4) ....      9,330       7,864       9,228       9,778       13,260      12,558      13,982 
                                         =========   =========    =========   =========   =========   =========    ========= 
</TABLE>

                                      11 
<PAGE>

             SELECTED CONSOLIDATED FINANCIAL DATA -- (CONTINUED) 

<TABLE>
<CAPTION>
                                                                 May 31,                                 August 31, 
                                        ---------------------------------------------------------  ---------------------- 
                                          1992       1993         1994        1995        1996        1995         1996 
                                        --------   ---------    ---------   ---------   ---------   ---------    --------- 
                                                              (in thousands, except per share data) 
<S>                                     <C>        <C>          <C>         <C>         <C>         <C>          <C>
Balance Sheet Data: 
Working capital  ....................   $ 9,228     $14,574     $13,837     $27,550      $48,476     $29,010     $50,088 
Total assets  .......................    21,439      28,460      33,714      47,722       75,103      50,166      78,555 
Total debt  .........................     5,439      11,285      10,032          --           --          --          -- 
Redeemable cumulative convertible 
  preferred stock issued by subsidiary    1,215       1,215       1,215       1,215           --       1,215          -- 
Redeemable cumulative convertible 
  preferred stock ...................     4,500       4,500       4,500          --           --          --          -- 
Common stockholders' equity  ........     4,729       5,337       6,289      33,576       58,781      35,182      61,222 

</TABLE>

- ------ 
(1) On February 1, 1995, the Company accelerated the vesting of all 
    outstanding stock options under its 1986 Incentive Stock Option Plan (the 
    "1986 Plan"), thereby allowing all such options to be fully vested at 
    such date. The Company also relinquished its right to repurchase shares 
    obtained by employees under the 1986 Plan. As a result, the Company 
    recorded a non-recurring, noncash compensation charge of approximately 
    $1.25 million, or $0.13 per share. 

(2) During fiscal 1994, the Company changed its method of accounting for 
    income taxes to conform with Statement of Financial Accounting Standards 
    No. 109. 

(3) On September 20, 1996, the Board of Directors approved a two-for-one 
    stock split of the Company's Common Stock in the form of a stock dividend 
    to be paid on October 31, 1996 to holders of record on October 15, 1996. 
    Earnings per common and common equivalent share and weighted average 
    number of common and common equivalent shares outstanding have been 
    retroactively adjusted to reflect the stock split. 

(4) Earnings per common and common equivalent share has been computed by 
    dividing net earnings, after reduction for preferred stock dividends, 
    when applicable, by the weighted average number of common shares and 
    common equivalent shares outstanding. Common equivalent shares included 
    in the computation represent common equivalent shares from convertible 
    preferred stock, when applicable, and dilutive common equivalent shares 
    from stock options (using the treasury stock method). 

                                      12 
<PAGE>

              MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL 
                     CONDITION AND RESULTS OF OPERATIONS 

THREE MONTHS ENDED AUGUST 31, 1995 AND 1996 

   Total Revenues. Total revenues increased by 32.6% to $23.3 million in the 
three months ended August 31, 1996 from $17.5 million in the three months 
ended August 31, 1995. System sales increased by 27.9% to $17.8 million in 
the three months ended August 31, 1996 from $13.9 million in the three months 
ended August 31, 1995. The increase in system sales was primarily due to an 
increase in unit sales volume. Service revenues increased by 50.5% to $5.5 
million in the three months ended August 31, 1996 from $3.7 million in the 
three months ended August 31, 1995, primarily due to the addition of more 
units to the service base as well as an increase in installation revenues. 

   Gross Profit. The Company's gross profit increased by $3.0 million, or 
34.5%, to $11.9 million in the three months ended August 31, 1996 from $8.9 
million in the three months ended August 31, 1995. Gross profit as a 
percentage of total revenues increased to 51.3% in the three months ended 
August 31, 1996 from 50.6% in the three months ended August 31, 1995. Gross 
profit on system sales increased by $2.3 million, or 30.1%, to $9.7 million 
in the three months ended August 31, 1996 from $7.5 million in the three 
months ended August 31, 1995. The gross margin on system sales increased to 
54.8% in the three months ended August 31, 1996 from 53.9% in the three 
months ended August 31, 1995. The Company attributes this increase primarily 
to manufacturing and productivity efficiencies of scale resulting from 
increased sales volume during the period. Gross profit on service revenues 
increased by $0.8 million, or 58.3%, to $2.2 million in the three months 
ended August 31, 1996 from $1.4 million in the three months ended August 31, 
1995. Gross margin on service revenues increased to 40.0% in the three months 
ended August 31, 1996 from 38.0% in the three months ended August 31, 1995. 
This increase was attributable to higher installation revenues and an 
increase in the service base. 

   Selling, General and Administrative Expenses. Selling, General and 
Administrative ("SG&A") expenses were $6.2 million and $4.9 million for the 
three months ended August 31, 1996 and 1995, respectively, or 26.5% and 27.7% 
of total revenues, respectively. The increase in the dollar amount of SG&A 
expenses was primarily due to both the continued expansion of the Company's 
sales effort in domestic and international markets and to increases in SG&A 
expenses necessary to support the increased level of sales. SG&A expenses 
decreased as a percentage of total revenues due to the Company's ability to 
leverage certain fixed expenses over its growing revenue base. 

   Research and Development Expenses. Research and Development ("R&D") 
expenses were $2.4 million and $1.6 million for the three months ended August 
31, 1996 and 1995, respectively, or 10.4% and 9.2% of total revenues, 
respectively. The increase in the dollar amount of R&D expenses reflects the 
continued expansion of the Company's R&D staff which increased to 100 from 79 
between August 31, 1995 and August 31, 1996. R&D expenses are charged to 
operations as incurred, and no software development costs have been 
capitalized. The Company expects the dollar amount of R&D expenditures to 
continue to increase, although such expenses as a percentage of total 
revenues will vary from period to period. 

   Other Income (Expense). Other income was $0.4 and $0.1 million for the 
three months ended August 31, 1996 and 1995 respectively. Interest and other 
income increased to $0.3 million in the three months ended August 31, 1996 
from $0.2 million in the three months ended August 31, 1995 primarily due to 
increased cash balances. The Company had a foreign exchange gain of $0.1 
million for the three months ended August 31, 1996 compared to a foreign 
exchange loss of $0.1 million for the three months ended August 1995. To the 
extent the Company is unable to match revenue received in foreign currencies 
with expense paid in the same currency it is exposed to fluctuations on 
international currency transactions. 

   Income Taxes. Variations in the customary relationship between the 
provision for income taxes and the statutory federal income tax rate 
primarily result from foreign subsidiaries' net operating losses which did 
not produce current tax benefits, the utilization of research and development 
tax credits and state and local income taxes. The Company's effective income 
tax rates were 39.0% and 41.0% for the three months ended August 31, 1996 and 
1995, respectively. 

                                      13 
<PAGE>

   Foreign Operations. The Company's European subsidiary operated at 
approximately a $0.4 million loss during the three months ended August 31, 
1996 as compared to approximately break-even during the three months ended 
August 31, 1995. The increase in such losses was attributed to a decrease in 
the gross margin and increase in the dollar amount of SG&A expenses to 
support the expansion of the sales and marketing effort in the three months 
ended August 31, 1996. Transfers from the Company's North American operations 
to its European subsidiary are accounted for at cost, plus a reasonable 
profit. 

FISCAL YEARS ENDED MAY 31, 1995 AND 1996 

   Total Revenues. Total revenues increased by 37.1%, from $64.8 million in 
fiscal 1995 to $88.8 million in fiscal 1996. System sales increased by 38.8%, 
from $51.7 million in fiscal 1995 to $71.8 million in fiscal 1996. The 
increase in system sales was due to a 35.8% increase in domestic sales and a 
44.5% increase in international sales and was in part related to the 
introduction of the VPS/is system, a new RISC and UNIX based product. The 
increase in system sales was primarily due to increases in unit sales volume. 
Service revenues increased by 30.5%, from $13.0 million in fiscal 1995 to 
$17.0 million in fiscal 1996, primarily due to the addition of units to the 
service base, as well as an increase in installation revenues. 

   Gross Profit. The Company's gross profit increased by $12.3 million from 
$32.7 million in fiscal 1995 to $45.0 million in fiscal 1996. Gross profit as 
a percentage of total revenues increased from 50.5% in fiscal 1995 to 50.7% 
in fiscal 1996. Gross profit on system sales increased by $10.9 million, or 
39.0%, from $28.1 million in fiscal 1995 to $39.0 million in fiscal 1996. 
Gross margin on system sales increased from 54.2% in fiscal 1995 to 54.3% in 
fiscal 1996. Gross profit on service revenues increased by $1.4 million, or 
30.2%, from $4.6 million in fiscal 1995 to $6.0 million in fiscal 1996. Gross 
margin on service revenues was 35.6% in both fiscal 1995 and fiscal 1996. 

   Selling, General and Administrative Expenses. SG&A expenses were $18.7 
million and $22.6 million for fiscal 1995 and 1996, respectively, or 28.9% 
and 25.4% of total revenues, respectively. The increase in the dollar amount 
of the SG&A expenses was primarily due to expansion of the sales effort in 
both domestic and international markets, increased sales commissions due to 
the significant increase in revenues and increases in expenses to support the 
increased level of sales. SG&A expenses decreased as a percentage of total 
revenues due to the Company's ability to leverage certain fixed expenses over 
its growing revenue base. 

   Research and Development Expenses. R&D expenses were $5.8 million and $7.9 
million for fiscal 1995 and 1996, respectively, or 9.0% and 8.9% of total 
revenues, respectively. The increase in the dollar amount of research and 
development expense reflects the continued expansion of the Company's R&D 
staff which increased from 69 to 101 between May 31, 1995 and 1996. 

   Non-recurring Noncash Stock Option Compensation Expense. On February 1, 
1995, the Company accelerated the vesting on all outstanding stock options 
under its 1986 Incentive Stock Option Plan ("the 1986 Plan"), thereby 
allowing all such options to be fully vested at such date. The Company also 
relinquished its right to repurchase shares obtained by employees under the 
1986 Plan. As a result, the Company recorded a non-recurring noncash 
compensation charge of approximately $1.25 million, equal to the difference 
between the formula price as of February 1, 1995 (which was calculated 
utilizing a formula based upon the book value of the Company's Common Stock) 
of all outstanding stock options issued subsequent to January 28, 1988 and 
their estimated value on February 1, 1995 (based upon the initial public 
offering price of the Company's Common Stock). 

   Other Income (Expense). Other income was $0.5 million for fiscal 1996 as 
compared to other expense of $0.7 million in fiscal 1995. Interest expense 
decreased from $1.0 million in fiscal 1995 to $0.0 in fiscal 1996, due to the 
elimination of debt by the use of proceeds from the Company's initial public 
offering. Interest income was $0.2 million and $0.9 million in fiscal 1995 
and fiscal 1996. Foreign exchange gain (loss) decreased from a gain of $0.1 
million in fiscal 1995 to a loss of $0.4 million in fiscal 1996. 

   Income Taxes. Variations in the customary relationship between the 
provision for income taxes and the statutory income tax rate primarily result 
from foreign subsidiaries' net operating losses which did not produce current 
tax benefits, the utilization of research and development tax credits and 
state and local 

                                      14 
<PAGE>

income taxes. The Company's effective income tax rates were 48.1% and 38.8% 
for fiscal 1995 and fiscal 1996, respectively. Excluding the effect of the 
non-recurring noncash compensation charge the effective income tax rate for 
fiscal 1995 would have been 40.0%. 

   Foreign Operations. The Company's European subsidiary had an operating 
profit of $0.8 million during fiscal 1996 as compared to an operating loss of 
$0.2 million during fiscal 1995. The increase in profitability was primarily 
due to an increase in the gross margin on increased system sales. Transfers 
from the Company's North American operations to its European subsidiary are 
accounted for at cost, plus a reasonable profit. The cost of revenues for the 
Company's European subsidiary includes approximately $0.9 million and $0.6 
million of intercompany gross profit earned by the Company's North American 
operations on system sales by the European subsidiary to third parties during 
fiscal 1995 and fiscal 1996, respectively. 

LIQUIDITY AND CAPITAL RESOURCES 

   The Company's principal cash requirement to date has been to fund working 
capital and capital expenditures in order to support the growth in revenues. 
Historically, the Company has primarily financed this requirement through 
cash flow from operations, bank borrowings and two public offerings of the 
Company's Common Stock in 1995, which resulted in an aggregate of $41,100,000 
of net proceeds to the Company. Cash flow from operations was $2.4 million 
for the three months ended August 31, 1996 and $9.6 million for the year 
ended May 31, 1996. At August 31, 1996, the Company had working capital of 
$50.1 million, including $28.4 million of cash and cash equivalents and 
short-term investments. 

   The average days sales outstanding (calculated by dividing the net 
accounts receivable at the balance sheet date for each period by the average 
sales per day during the quarter immediately preceding the balance sheet 
date) were approximately 93 days and 83 days at August 31, 1996 and May 31, 
1996, respectively. The Company attributes the increase in days' sales 
outstanding primarily to increased sales to government agencies which 
generally have longer payment cycles. To the extent the Company's sales mix 
continues to shift towards government agencies, the average day's sales 
outstanding is expected to increase. 

   The Company's inventory as of August 31, 1996 and May 31, 1996 was $13.1 
million and $11.1 million respectively. The increase in inventory from May 
31, 1996 to August 31, 1996 reflects an investment by the Company to support 
future sales growth. 

   In January 1995, the Company increased its line of credit to $8.0 million 
with interest charged at the prime rate plus 0.25%. The line of credit 
expires on November 30, 1996. As of August 31, 1996, the Company had no 
borrowings under this line of credit. The Company is presently negotiating to 
increase, extend and restructure the line of credit to a revolving line of 
credit, with a term loan option. 

   The Company made capital expenditures totaling $1.5 million and $0.7 
million during the three months ended August 31, 1996 and 1995, respectively. 
The Company expects that its capital expenditures in the current fiscal year 
for facilities expansion, possible technology licenses and acquisitions, and 
additional computer equipment utilized for development and testing of the 
Company's products, will be substantially greater than its capital 
expenditures in the prior several years. 

   The Company believes that its existing sources of working capital and 
borrowings available under its revolving line of credit will be sufficient to 
fund its operations and capital expenditures for at least 12 months. 

                                      15 
<PAGE>

                      PRINCIPAL AND SELLING STOCKHOLDERS 

   The following table sets forth certain information regarding the 
beneficial ownership of the Company's Common Stock as of the date of this 
Prospectus, as adjusted to reflect the 2-for-1 stock dividend to be paid on 
October 31, 1996, and the sale of the shares of Common Stock offered hereby, 
by (i) each person who is known to the Company to own beneficially more than 
5% of the outstanding shares of Common Stock, (ii) each of the Company's 
Named Executives, (iii) each of the selling stockholders and (iv) all 
Executive Officers and Directors of the Company as a group. 

<TABLE>
<CAPTION>
                                               Shares Beneficially                            Shares Beneficially 
      Name and Address of Beneficial             Owned Prior to        Shares To Be Sold          Owned After 
               Owner (1) (2)                      Offering (2)          In Offering (3)          Offering (3) 
 -----------------------------------------  ------------------------    -----------------  ------------------------ 
                                               Number       Percent                           Number       Percent 
                                             -----------   ---------                        -----------   --------- 
<S>                                         <C>            <C>          <C>                 <C>           <C>
Peter J. Cohen (4)  ......................      916,490       6.7%           296,962          619,528        4.5% 
George W. Cole  ..........................      550,750       4.0%           178,454          372,296        2.7% 
Richard A. Daniels (4)  ..................      780,228       5.7%           252,808          527,420        3.9% 
Terence Meehan  ..........................      367,166       2.7%           118,968          248,198        1.8% 
Kevin J. O'Brien  ........................      367,166       2.7%           118,968          248,198        1.8% 
Jayandra Patel  ..........................      413,060       3.0%           133,840          279,220        2.0% 
Edward Blum (5)  .........................        6,250          *             --               6,250           * 
Peter Breitstone (5)  ....................        6,250          *             --               6,250           * 
GeoCapital Corporation (1)  ..............      869,400       6.4%             --             869,400        6.4% 
OppenheimerFunds, Inc. (1)  ..............      740,800       5.4%             --             740,800        5.4% 
All Executive Officers and Directors as a
 group (nine persons) (5)(6) .............    3,535,360      25.9%         1,100,000        2,435,360       17.9% 

</TABLE>

- ------ 
* Less than 1% 
(1) Unless otherwise indicated, all addresses are care of Periphonics 
    Corporation, 4000 Veterans Memorial Highway, Bohemia, New York 11716. 
    GeoCapital Corporation's address is 767 Fifth Avenue, New York, New York 
    10153. OppenheimerFunds, Inc.'s address is Two World Trade Center, New 
    York, New York 10048. Information with respect to GeoCapital Corporation 
    and OppenheimerFunds, Inc. is based on the Schedule 13-G filing made by 
    such companies as of June 30, 1996. 

(2) A person is deemed to be the beneficial owner of securities that can be 
    acquired by such person within 60 days from the date of this Prospectus 
    upon the exercise of options. Each beneficial owner's percentage 
    ownership is determined by assuming that options that are held by such 
    person (but not those held by any other person) and that are exercisable 
    within 60 days from the date of this Prospectus have been exercised. 
    Unless otherwise noted, the Company believes that all persons named in 
    the table have sole voting and investment power with respect to all 
    shares of Common Stock beneficially owned by them. 

(3) Assumes no exercise of the over-allotment option. The Selling 
    Stockholders have granted the Underwriters a 30-day option to purchase up 
    to 165,000 shares of Common Stock solely to cover over-allotments, if 
    any. If such option is exercised in full, Messrs. Cohen, Cole, Daniels, 
    Meehan, O'Brien and Patel will sell an additional 44,542, 26,768, 37,922, 
    17,846, 17,846 and 20,076 shares of Common Stock, respectively, and their 
    percentage of beneficial ownership after the offering will be 4.2%, 2.5%, 
    3.6%, 1.7%, 1.7% and 1.9%, respectively. 

(4) Of the shares beneficially owned by Mr. Cohen, 821,398 are held of record 
    in a Grantor Retained Annuity Trust for the benefit of Mr. Cohen's 
    children, of which Mr. Cohen is a co-trustee and retains voting and 
    dispositive power with respect to the shares. All the shares being sold 
    by Mr. Cohen are held of record in the Peter J. Cohen Grantor Trust. All 
    780,228 shares beneficially owned by Mr. Daniels are held of record in 
    the Richard A. Daniels Grantor Retained Annuity Trust for the benefit of 
    Mr. Daniels' children of which Mr. Daniels is the sole trustee. 

(5) Does not include options to purchase 37,500 shares of Common Stock not 
    exercisable within 60 days. 

(6) Includes 120,500 shares subject to options exercisable within 60 days of 
    this Prospectus. 

                                      16 
<PAGE>

                         DESCRIPTION OF CAPITAL STOCK 

   The Company's authorized capital stock consists of 15,000,000 shares of 
Common Stock, par value $.01 per share, and 1,000,000 shares of Preferred 
Stock, par value $.01 per share. As of October 23, 1996, there were 
13,625,132 shares of Common Stock (reflecting the 2-for-1 stock split in the 
form of a stock dividend payable on October 31, 1996) issued and outstanding 
held of record by 139 stockholders, and no shares of Preferred Stock are 
currently outstanding. As of October 23, 1996, there were outstanding options 
to purchase an additional 723,032 shares of the Company's Common Stock. At 
the Company's annual meeting on November 8, 1996 the shareholders will vote 
on a proposal to increase the authorized Common Stock to 30,000,000 shares. 

COMMON STOCK 

   Holders of shares of Common Stock are entitled to one vote for each share 
held of record on matters to be voted on by the stockholders of the Company. 
Holders of shares of Common Stock will be entitled to receive dividends, 
subject to the superior rights of Preferred Stockholders, if any, when, as 
and if declared by the Board of Directors. The Company currently intends to 
retain all future earnings for use in the operation of its business and, 
therefore, does not anticipate paying any cash dividends on its Common Stock 
in the foreseeable future. Upon the dissolution, liquidation or sale of 
substantially all of the assets of the Company, after payment in full of all 
amounts required to be paid to creditors and subject to the rights, if any, 
of the holders of any Preferred Stock, the holders of the Common Stock are 
entitled to share ratably in the assets of the Company legally available for 
distribution to its stockholders. Holders of Common Stock have no preemptive, 
subscription, redemption or conversion rights. All of the issued and 
outstanding shares of Common Stock are, and all shares of Common Stock to be 
sold in this offering will be, duly authorized, validly issued, fully paid 
and non-assessable. 

PREFERRED STOCK 

   The Company's Board of Directors may without further action by the 
Company's stockholders, from time to time, direct the issuance of shares of 
Preferred Stock in series and may, at the time of issuance, determine the 
rights, preferences and limitation of each series. The holders of Preferred 
Stock would normally be entitled to receive a preference payment in the event 
of any liquidation, dissolution or winding-up of the Company before any 
payment is made to the holders of Common Stock. 

   The ability of the Company's Board of Directors to issue Preferred Stock 
may delay or prevent a takeover or change in control of the Company. To the 
extent that this ability has this effect, removal of the Company's incumbent 
Board of Directors and management may be rendered more difficult. Further, 
this may have an adverse impact on the ability of stockholders of the Company 
to participate in a tender or exchange offer for the Common Stock and in so 
doing diminish the market value of the Common Stock. 

RIGHTS PLAN 

   On July 15, 1996, the Board of Directors of the Company approved a Rights 
Plan designed to protect stockholders in the event of an unsolicited attempt 
to acquire the Company, including a gradual accumulation of shares in the 
open market, a partial or two-tier tender offer that does not treat all 
stockholders equally, and other takeover tactics which the Board of Directors 
believes may be abusive and not in the best interests of stockholders. The 
implementation of the Rights Plan increases the Board of Director's power in 
the event of an unsolicited proposal by giving the Board of Directors more 
time and the opportunity to evaluate an offer and exercise its good faith 
business judgment to take appropriate steps to protect and advance 
stockholder interests by negotiating with the bidder, auctioning the Company, 
implementing a recapitalization or restructuring designed as an alternative 
to the offer, or taking other action. 

LIMITATION OF LIABILITY AND INDEMNIFICATION OF DIRECTORS AND OFFICERS 

   The Company's Amended and Restated Certificate of Incorporation (the 
"Certificate") provides that a director shall not be personally liable to the 
Company or its stockholders for monetary damages for breach of fiduciary duty 
as a director, except: (i) for any breach of the director's duty of loyalty 
to the Company or its stockholders; (ii) for acts or omissions not in good 
faith or which involve intentional misconduct or knowing violations of law; 
(iii) for liability under Section 174 of the Delaware General Corporation Law 
(relating to certain unlawful dividends, stock repurchases or stock 
redemptions); or (iv) for any transaction 

                                      17 
<PAGE>

from which the director derived any improper personal benefit. The effect of 
this provision in the Certificate is to eliminate the rights of the Company 
and its stockholders (through stockholders' derivative suits on behalf of the 
Company) to recover monetary damages against a director for breach of the 
fiduciary duty of care as a director (including breaches resulting from 
negligent or grossly negligent behavior) except in certain limited 
situations. This provision does not limit or eliminate the rights of the 
Company or any stockholder to seek non-monetary relief such as an injunction 
or rescission in the event of a breach of a director's duty of care. These 
provisions will not alter the liability of Directors under federal securities 
laws. 

   The Company's By-Laws provide that the Company shall indemnify each 
Director and such of the Company's officers, employees and agents as the 
Board of Directors shall determine from time to time to the fullest extent 
provided by the laws of the State of Delaware. 

   The Company carries insurance providing indemnification, under certain 
circumstances, to all of its directors and officers for claims against them 
by reason of, among other things, any act or failure to act in their 
capacities as directors or officers. No sums have been paid to any past or 
present director or officer under this or any prior indemnification insurance 
policy. 

   The Company has also entered into Indemnity agreements with all of its 
directors and executive officers. The Indemnity Agreements provide for 
indemnification of the Company's directors and executive officers to the 
fullest extent permitted by the provisions of the General Corporation Law of 
the State of Delaware. The Indemnity Agreements also provide that the Company 
will pay any costs which an indemnitee actually and reasonably incurs because 
of any claims made against him by reason of the fact that he is or was a 
director or officer of the Company, except that the Company is not obligated 
to make any payment which the Company is prohibited by law from paying as 
indemnity, or where (a) a final determination is rendered on a claim based 
upon the indemnitee's obtaining a personal profit or advantage to which he 
was not legally entitled; (b) a final determination is rendered on the claim 
for an accounting of profits made in connection with a violation of Section 
16(b) of the Securities Exchange Act of 1934, or similar state or common law 
provisions; (c) a claim where the indemnitee was adjudged to be deliberately 
dishonest; or (d) a final determination is rendered that indemnification is 
not lawful. 

   Insofar as indemnification for liabilities arising under the Act may be 
permitted to Directors, officers or persons controlling the Company pursuant 
to the foregoing provisions, the Company has been informed that in the 
opinion of the Securities and Exchange Commission, such indemnification is 
against public policy as expressed in the Act and is therefore unenforceable. 

TRANSFER AGENT AND REGISTRAR 

   The transfer agent and registrar for the Common Stock is American Stock 
Transfer and Trust Company. 

                                      18 
<PAGE>

                                 UNDERWRITING 

   The Company and the Selling Stockholders have entered into an Underwriting 
Agreement (the "Underwriting Agreement") with William Blair & Company, L.L.C. 
and Dain Bosworth Incorporated (the "Underwriters"). Subject to the terms and 
conditions set forth in the Underwriting Agreement, the Selling Stockholders 
have agreed to sell to each of the Underwriters, and each of the Underwriters 
has severally agreed to purchase from the Selling Stockholders, the number of 
shares of Common Stock set forth opposite each Underwriter's name in the 
table below: 

<TABLE>
<CAPTION>
                                                                   Number of 
 Underwriters                                                        Shares 
 ------------                                                     ----------- 
<S>                                                                <C>
William Blair & Company, L.L.C. .............................         550,000 
Dain Bosworth Incorporated  .................................         550,000 
                                                                  ----------- 
     Total  .................................................       1,100,000 
                                                                   =========== 

</TABLE>

   In the Underwriting Agreement, the Underwriters have agreed, subject to 
the terms and conditions set forth therein, to purchase all of the Common 
Stock being sold pursuant to the Underwriting Agreement if any of the Common 
Stock being sold pursuant to the Underwriting Agreement (excluding shares 
covered by the over-allotment option granted therein) is purchased. In the 
event of a default by any Underwriter, the Underwriting Agreement provides 
that, in certain circumstances, purchase commitments of the non-default 
Underwriters shall be increased or the Underwriting Agreement may be 
terminated. 

   The Underwriters have advised the Selling Stockholders that they propose 
to offer the shares of Common Stock to the public initially at the public 
offering price set forth on the cover page of this Prospectus and to certain 
dealers at such price less a concession of not more than $0.58 per share. 
Additionally, the Underwriters may allow, and such dealers may reallow, a 
concession not in excess of $0.10 per share to certain other dealers. After 
the shares are released for sale to the public, the public offering price and 
other selling terms may be changed by the Underwriters. 

   The Selling Stockholders have granted to the Underwriters an option, 
exercisable within 30 days after the date of this Prospectus, to purchase up 
to 165,000 shares of Common Stock at the same price per share to be paid by 
the Underwriters for the other shares offered hereby. If the Underwriters 
purchase any such additional shares pursuant to this option, each of the 
Underwriters will be committed to purchase such additional shares in 
approximately the same proportion as set forth in the table above. The 
Underwriters may exercise the option only for the purpose of covering 
over-allotments, if any, made in connection with the distribution of the 
Common Stock offered hereby. The additional shares purchased pursuant to this 
option shall be allocated among each of the Selling Stockholders in 
proportion to their total commitments to provide shares for this option. 

   The Company and the Selling Stockholders have agreed that they will not 
sell, contract to sell or otherwise dispose of any shares of Common Stock for 
a period of 180 days after the date of this Prospectus without the written 
consent of the Underwriters, except for the Common Stock offered hereby. 

   In general, the rules of the Commission will prohibit the Underwriters 
from making a market in the Company's Common Stock during the "cooling off" 
period immediately preceding the commencement of sales in this offering. The 
Commission has, however, adopted exemptions from these rules that permit 
passive market making under certain conditions. These rules permit an 
underwriter to continue to make a market subject to the conditions, among 
others, that its bid not exceed the highest bid by a market maker not 
connected with the offering and that its net purchases on any one trading day 
not exceed prescribed limits. Pursuant to these exemptions, certain 
Underwriters, selling group members (if any) or their respective affiliates 
intend to engage in passive market making in the Company's Common Stock 
during the cooling off period. 

   The Company and the Selling Stockholders have agreed to indemnify the 
Underwriters and their controlling persons against certain liabilities, 
including liabilities under the Securities Act of 1933, as amended, or to 
contribute to payments the Underwriters may be required to make in respect 
thereof. 

   The Underwriters do not intend to confirm sales to any accounts over which 
they exercise discretionary authority. 

                                      19 
<PAGE>

                                LEGAL MATTERS 

   The validity and issuance of the Common Stock offered hereby will be 
passed upon for the Company and the Selling Stockholders by Ruskin, Moscou, 
Evans & Faltischek, P.C., Mineola, New York. Certain legal matters in 
connection with the offering will be passed upon for the Underwriters by 
Testa, Hurwitz & Thibeault, LLP, Boston, Massachusetts. As of the date of 
this Prospectus, certain members of Ruskin, Moscou, Evans & Faltischek, P.C., 
and members of their immediate family own, in the aggregate, approximately 
15,200 shares of the Company's Common Stock. 

                                   EXPERTS 

   The financial statements and related financial statement schedules 
incorporated in this Prospectus by reference from the Company's Annual Report 
on Form 10-K for the year ended May 31, 1996 have been audited by Deloitte & 
Touche LLP, independent auditors, as stated in their report, which is 
incorporated herein by reference, and has been so incorporated in reliance 
upon the report of such firm given upon their authority as experts in 
accounting and auditing. 

                            ADDITIONAL INFORMATION 

   The Company has filed with the Securities and Exchange Commission (the 
"Commission") in Washington, D.C. a Registration Statement on Form S-3 under 
the Act, with respect to the Common Stock offered by this Prospectus. This 
Prospectus does not contain all the information set forth in the Registration 
Statement and the exhibits and schedules thereto. For further information 
with respect to the Company and the Common Stock, reference is made to the 
Registration Statement and such exhibits and schedules. Statements in the 
Prospectus as to the contents of any contract or other document referred to 
are not necessarily complete and in each instance reference is made to the 
copy of such contract or other document filed as an exhibit to the 
Registration Statement, each such statement being qualified in all respects 
by such reference. The Registration Statement and the exhibits and schedules 
thereto may be inspected by anyone without charge at the principal office of 
the Commission at the Public Reference Section of the Commission at Room 
1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, and at 
the regional offices of the Commission located at Seven World Trade Center, 
New York, New York 10048 and Northwestern Atrium Center, 500 West Madison 
Street, Suite 1400, Chicago, Illinois 60661 and copies of all or any part of 
it may be obtained from the Commission upon payment of a prescribed fee. The 
Registration Statement, including the exhibits and schedules thereto, can 
also be accessed through the EDGAR terminals in the Commission's Public 
Interest Rooms in Washington, Chicago and New York or through the World Wide 
Web at http://www.sec.gov. 

   The Company is subject to the information requirements of the Securities 
Exchange Act of 1934 (the "Exchange Act"), and in accordance therewith, files 
reports and other information with the Securities and Exchange Commission 
(the "Commission"). Such reports and other information can be inspected and 
copied at the public reference facilities maintained by the Commission at 
Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549 and at the 
Commission's regional offices located at Seven World Trade Center, 13th 
Floor, New York, New York 10048 and Northwestern Atrium Center, 500 West 
Madison Street, Chicago, Illinois 60661. Copies of such material can be 
obtained at prescribed rates from the Public Reference Section of the 
Commission, 450 Fifth Street NW, Washington, D.C. 20549. The Company's Common 
Stock is quoted on the NASDAQ Stock Market and reports and other information 
concerning the Company may also be inspected and copies at the office of the 
NASDAQ Stock Market, Inc., 8513 Key West Avenue, Rockville, Maryland 20850. 

   The Company furnishes Annual Reports to the holders of its securities 
which contain financial information which has been examined and reported 
upon, with an opinion expressed by, its independent certified public 
accountants. 

                                      20 
<PAGE>

==============================================================================

   No dealer, sales representative or other person has been authorized to 
give any information or to make any representation in connection with this 
offering other than those contained in this Prospectus, and if given or made, 
such information or representation must not be relied upon as having been 
authorized by the Company or any Underwriters. This Prospectus does not 
constitute an offer to sell or a solicitation of an offer to buy Common Stock 
by anyone in any jurisdiction in which such an offer or solicitation is not 
authorized, or in which the persons making such an offer or solicitation is 
not qualified to do so, or to any person to whom it is unlawful to make such 
an offer or solicitation. Neither the delivery of this Prospectus nor any 
sale made hereunder shall, under any circumstance, create any implication 
that the information contained herein is correct as of any date subsequent to 
its date. 
                                    ------ 

                              TABLE OF CONTENTS 

                                                                    Page 
                                                                   -------- 
Documents Incorporated by Reference  ............................     2 
Prospectus Summary  .............................................     3 
Risk Factors  ...................................................     5 
The Company  ....................................................     9 
Use of Proceeds  ................................................    10 
Price Range of Common Stock  ....................................    10 
Dividend Policy  ................................................    10 
Selected Consolidated Financial Data  ...........................    11 
Management's Discussion and Analysis of 
  Financial Condition and Results of 
  Operations ....................................................    13 
Principal and Selling Stockholders  .............................    16 
Description of Capital Stock  ...................................    17 
Underwriting  ...................................................    19 
Legal Matters  ..................................................    20 
Experts  ........................................................    20 
Additional Information  .........................................    20 



==============================================================================


<PAGE>

                               1,100,000 SHARES 








                          -----------
                          Periphonics        LOGO 
                          CORPORATION
                          ------------








                                  COMMON STOCK




                                     ------
                                   PROSPECTUS
                                NOVEMBER 5, 1996
                                     ------




                             WILLIAM BLAIR & COMPANY


                                  DAIN BOSWORTH
                                  Incorporated





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