ULTICOM INC
S-1/A, EX-1.1, 2000-09-15
TELEPHONE & TELEGRAPH APPARATUS
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                                                                     EXHIBIT 1.1


                                  ULTICOM, INC.

                                  Common Stock

                             UNDERWRITING AGREEMENT


                                                             September ___, 2000

LEHMAN BROTHERS INC.
CHASE SECURITIES INC.
BEAR, STEARNS & CO. INC.
U.S. BANCORP PIPER JAFFRAY INC.
As Representatives of the
  several Underwriters named in Schedule 1,
c/o LEHMAN BROTHERS INC.
Three World Financial Center
New York, NY  10285

Dear Sirs:

                  Ulticom, Inc., a New Jersey corporation (the "Company"),
proposes and certain shareholders of the Company named in Schedule 2 hereto (the
"Selling Shareholders") propose to sell an aggregate of 4,250,000 shares (the
"Firm Stock") of the Company's Common Stock, no par value (the "Common Stock").
Of the 4,250,000 shares of Firm Stock, 2,843,374 are being sold by the Company
and 1,406,626 are being sold by the Selling Shareholders. In addition, the
Company proposes to grant to the Underwriters named in Schedule 1 hereto (the
"Underwriters") an option to purchase up to an additional 637,500 shares of the
Common Stock on the terms and for the purposes set forth in Section 2 (the
"Option Stock"). The Firm Stock and the Option Stock, if purchased, are
hereinafter collectively called the "Stock." This is to confirm the agreement
concerning the purchase of the Stock from the Company and the Selling
Shareholders by the Underwriters.

                  1. Representations, Warranties and Agreements of the Company.
The Company represents, warrants and agrees that:

                           (a) A registration statement on Form S-1, and
                  amendments thereto, with respect to the Stock have (i) been
                  prepared by the Company in conformity with the requirements of
                  the United States Securities Act of 1933, as amended (the
                  "Securities Act") and the rules and regulations (the "Rule and
                  Regulations") of the United States Securities and Exchange
                  Commission (the "Commission") thereunder, (ii) been filed with
                  the Commission under the Securities Act and (iii) become
                  effective under the Securities Act. Copies of such
                  registration statement and all amendments thereto have been
                  delivered by the Company to you as the representatives (the
                  "Representatives") of the Underwriters. As used in this
                  Agreement, "Effective Time" means the date and the time as of
                  which such registration
<PAGE>

                  statement, or the most recent post-effective amendment
                  thereto, if any, was declared effective by the Commission;
                  "Effective Date" means the date of the Effective Time;
                  "Preliminary Prospectus" means each prospectus included in
                  such registration statement, or amendments thereof, before it
                  became effective under the Securities Act and any prospectus
                  filed with the Commission by the Company with the consent of
                  the Representatives pursuant to Rule 424(a) of the Rules and
                  Regulations; "Registration Statement" means such registration
                  statement, as amended at the Effective Time, including all
                  information contained in the final prospectus filed with the
                  Commission pursuant to Rule 424(b) of the Rules and
                  Regulations in accordance with Section 6(a) hereof and deemed
                  to be a part of the Registration Statement as of the Effective
                  Time pursuant to paragraph (b) of Rule 430A of the Rules and
                  Regulations; and "Prospectus" means such final prospectus, as
                  first filed with the Commission pursuant to paragraph (1) or
                  (4) of Rule 424(b) of the Rules and Regulations. The
                  Commission has not issued any order preventing or suspending
                  the use of any Preliminary Prospectus.

                           (b) The Registration Statement conforms, and the
                  Prospectus and any further amendments or supplements to the
                  Registration Statement or the Prospectus will, when they
                  become effective or are filed with the Commission, as the case
                  may be, conform in all material respects to the requirements
                  of the Securities Act and the Rules and Regulations and do not
                  and will not, as of the applicable Effective Date (as to the
                  Registration Statement and any amendment thereto) and as of
                  the applicable filing date (as to the Prospectus and any
                  amendment or supplement thereto) contain an untrue statement
                  of a material fact or omit to state a material fact required
                  to be stated therein or necessary to make the statements
                  therein not misleading; provided, that no representation or
                  warranty is made as to information contained in or omitted
                  from the Registration Statement or the Prospectus in reliance
                  upon and in conformity with written information furnished to
                  the Company through the Representatives by or on behalf of any
                  Underwriter specifically for inclusion therein, it being
                  understood that the only information so furnished is specified
                  in Section 11(f).

                           (c) The Company has been duly incorporated and is
                  validly existing as a corporation in good standing under the
                  laws of the State of New Jersey, is duly qualified to do
                  business and is in good standing as a foreign corporation in
                  each jurisdiction in which its ownership or lease of property
                  or the conduct of its business requires such qualification
                  (except where the failure to be so qualified or in good
                  standing would not have, individually or in the aggregate, a
                  material adverse effect on the business, properties, financial
                  condition, stockholders' equity or results of operations of
                  the Company (a "Material Adverse Effect")), and has all
                  corporate power and authority necessary to own or hold its
                  properties and to conduct the business in which it is engaged.
                  Ulticom Europe SA ("Ulticom Europe") is the only subsidiary of
                  the Company and is neither a "significant subsidiary" as that
<PAGE>

                  term is defined in Rule 405 of the Rules and Regulations nor
                  has it conducted any material business operations.

                           (d) The Company has the authorized capitalization as
                  set forth in the Prospectus, and all of the issued shares of
                  capital stock of the Company have been duly and validly
                  authorized and issued, are fully paid and non-assessable and
                  conform to the description thereof contained in the
                  Prospectus.

                           (e) The shares of the Stock to be issued and sold by
                  the Company to the Underwriters have been duly and validly
                  authorized and, when issued and delivered against payment
                  therefor as provided herein, will be duly and validly issued,
                  fully paid and non-assessable; and the Stock will conform to
                  the description thereof contained in the Prospectus under the
                  caption "Description of Securities--Common Stock."

                           (f) Upon payment for and delivery of the Stock to be
                  sold by the Company pursuant to this Agreement, the
                  Underwriters, or other persons in whose names the Stock is
                  registered will acquire good and valid title to such Stock, in
                  each case free and clear of all liens, encumbrances, equities,
                  preemptive rights and other claims.

                           (g) This Agreement has been duly authorized, executed
                  and delivered by the Company; and (assuming the due
                  authorization, execution and delivery thereof by the other
                  parties thereto) constitutes the legal, valid and binding
                  obligation of the Company, enforceable against it in
                  accordance with its terms, subject to the effects of
                  bankruptcy, insolvency, fraudulent conveyance, reorganization,
                  moratorium and other similar laws relating to or affecting
                  creditors' rights generally, general equitable principles
                  (whether considered in a proceeding in equity or at law) or an
                  implied covenant of good faith and fair dealing, except that
                  any rights or indemnification or contribution under this
                  Agreement may be limited by the laws of the State of New York,
                  the federal laws of the United States or public policy
                  relating thereto.

                           (h) The execution, delivery and performance of this
                  Agreement by the Company and the consummation of the
                  transactions contemplated hereby did not and will not conflict
                  with or result in a breach or violation of any of the terms or
                  provisions of, or constitute a default under, any indenture,
                  mortgage, deed of trust, loan agreement or other agreement or
                  instrument to which the Company is a party or by which the
                  Company is bound or to which any of the property or assets of
                  the Company is subject, nor will such actions result in any
                  violation of the provisions of the charter or by-laws of the
                  Company or any statute or any order, rule or regulation of any
                  court or governmental agency or body having jurisdiction over
                  the Company or any of its properties or assets; and except for
                  the registration of the Stock under the Securities Act and
                  such consents, approvals, authorizations, registrations
<PAGE>

                  or qualifications as may be required under the Exchange Act of
                  1934, as amended (the "Exchange Act"), and applicable state
                  securities laws in connection with the purchase and
                  distribution of the Stock by the Underwriters, no consent,
                  approval, authorization or order of, or filing or registration
                  with, any such court or governmental agency or body is
                  required for the execution, delivery and performance of this
                  Agreement by the Company and the consummation of the
                  transactions contemplated hereby.

                           (i) The Company effected a stock dividend of 2.2727
                  shares for each outstanding share of Common Stock which was
                  declared and paid on March 13, 2000, and all necessary
                  corporate action was taken to effect such stock dividend.

                           (j) Except as described in the Prospectus and in the
                  Registration Rights Agreement, dated January 1, 2000, by and
                  among the Company and Comverse Technology, Inc. ("Comverse"),
                  there are no contracts, agreements or understandings between
                  the Company and any person granting such person the right to
                  require the Company to file a registration statement under the
                  Securities Act with respect to any securities of the Company
                  owned or to be owned by such person or to require the Company
                  to include such securities in the securities registered
                  pursuant to the Registration Statement or in any securities
                  being registered pursuant to any other registration statement
                  filed by the Company under the Securities Act. The holders of
                  outstanding shares of the Company's capital stock are not
                  entitled to preemptive or other rights to subscribe for the
                  Stock. Except for the options to purchase from the Company
                  3,659,472 shares of the Common Stock in the aggregate granted
                  to officers, directors and employees of the Company under the
                  Company's 1998 Stock Incentive Compensation Plan (the "1998
                  Plan"), no options, warrants or other rights to purchase from
                  the Company, agreements or other obligations of the Company to
                  issue, or rights to convert any obligations of the Company
                  into or exchange any securities of the Company for, shares of
                  capital stock of or ownership interests in the Company are
                  outstanding.

                           (k) The Company has not sold or issued any shares of
                  Common Stock during the six-month period preceding the date of
                  the Prospectus, including any sales pursuant to Rule 144A
                  under, or Regulations D or S of, the Securities Act, other
                  than shares issued pursuant to the 1998 Plan or pursuant to
                  outstanding options or rights granted under the 1998 Plan.

                           (l) The Company has not sustained, since the date of
                  the latest audited financial statements included in the
                  Prospectus, any material loss or interference with its
                  business from fire, explosion, flood or other calamity,
                  whether or not covered by insurance, or from any labor dispute
                  or court or governmental action, order or decree, otherwise
                  than as set forth or contemplated in the Prospectus; and,
                  since such date, other than the stock dividend of 2.2727
                  shares for each outstanding share of Common Stock
<PAGE>

                  which was declared and paid on March 13, 2000, there has not
                  been any material change in the capital stock or long-term
                  debt of the Company or any material adverse change, or any
                  development involving a prospective material adverse change,
                  in or affecting the general affairs, management, financial
                  position, stockholders' equity or results of operations of the
                  Company, otherwise than as set forth or contemplated in the
                  Prospectus.

                           (m) The financial statements (including the related
                  notes and supporting schedules) filed as part of the
                  Registration Statement or included in the Prospectus present
                  fairly in all material respects the financial condition and
                  results of operations of the Company at the dates and for the
                  periods indicated, and have been prepared in conformity with
                  generally accepted accounting principles applied on a
                  consistent basis throughout the periods involved.

                           (n) Deloitte & Touche LLP, who have certified certain
                  financial statements of the Company, whose report appears in
                  the Prospectus and who have delivered the initial letter
                  referred to in Section 10(h) hereof, are independent public
                  accountants as required by the Securities Act and the Rules
                  and Regulations.

                           (o) The Company does not own any real property; and
                  the Company has good and marketable title to all material
                  personal property owned by it, free and clear of all liens,
                  encumbrances and defects, except such as do not materially
                  affect the value of such property and do not materially
                  interfere with the use made and proposed to be made of such
                  property by the Company. All real property and buildings held
                  under lease by the Company are held by it under valid,
                  subsisting and enforceable leases, with such exceptions as are
                  not material and do not interfere with the use made and
                  proposed to be made of such property and buildings by the
                  Company.

                           (p) The Company carries, or is covered by, insurance
                  in such amounts and covering such risks as is adequate for the
                  conduct of its business and the value of its properties and as
                  is customary for companies engaged in similar businesses in
                  similar industries.

                           (q) Except as described in the Prospectus, the
                  Company owns or possesses adequate rights to use all material
                  patents and trademarks, including all applications therefor,
                  copyrights and licenses necessary for the conduct of its
                  business as now conducted and as proposed to be conducted as
                  described in the Prospectus, except that no representation is
                  made with respect to any products currently under development;
                  and the Company has no reason to believe that the conduct of
                  its business will conflict with, and has not received any
                  notice of any claim of conflict with, any such rights of
                  others, except where such conflict would not have a Material
                  Adverse Effect.
<PAGE>

                           (r) There are no legal or governmental proceedings
                  pending to which the Company is a party or of which any
                  property or assets of the Company is the subject which, if
                  determined adversely to the Company, might have a Material
                  Adverse Effect; and to the best of the Company's knowledge, no
                  such proceedings are threatened or contemplated by
                  governmental authorities or threatened by others.

                           (s) There are no contracts or other documents which
                  are required to be described in the Prospectus or filed as
                  exhibits to the Registration Statement by the Securities Act
                  or by the Rules and Regulations which have not been described
                  in the Prospectus or filed as exhibits to the Registration
                  Statement.

                           (t) No relationship, direct or indirect, exists
                  between or among the Company on the one hand, and the
                  directors, officers, shareholders, customers or suppliers of
                  the Company on the other hand, which is required to be
                  described in the Prospectus which is not so described.

                           (u) No labor disturbance by the employees of the
                  Company exists or, to the knowledge of the Company, is
                  imminent which might be expected to have a Material Adverse
                  Effect.

                           (v) The Company is in compliance with all presently
                  applicable provisions of the Employee Retirement Income
                  Security Act of 1974, as amended, and the regulations
                  thereunder ("ERISA") except where such non-compliance would
                  not have a Material Adverse Effect. No "reportable event" (as
                  defined in ERISA) has occurred with respect to any "pension
                  plan" (as defined in ERISA) to which the Company contributes
                  or which the Company maintains that could have a Material
                  Adverse Effect. The Company has not incurred, and does not
                  expect to incur, any liability under (i) Title IV of ERISA
                  with respect to the termination of, or withdrawal from, any
                  "pension plan" or (ii) Section 412 or 4971 of the Internal
                  Revenue Code of 1986, as amended, and the regulations
                  thereunder (the "Code"), which has, or could be expected to
                  have, a Material Adverse Effect. Each "pension plan" for which
                  the Company could have any liability and that is intended to
                  be qualified under Section 401(a) of the Code is so qualified
                  in all material respects and nothing has occurred, whether by
                  action or by failure to act, which would cause the loss of
                  such qualification except where such loss of qualification
                  would not have a Material Adverse Effect.

                           (w) The Company has filed all federal, state and
                  local income and franchise tax returns required to be filed
                  through the date hereof and has paid all taxes shown to be due
                  thereon, and no tax deficiency has been determined adversely
                  to the Company which has had (nor does the Company have any
                  knowledge of any tax deficiency which, if determined adversely
                  to the Company, might have) a Material Adverse Effect.
<PAGE>

                           (x) Since the date as of which information is given
                  in the Prospectus through the date hereof, and except as may
                  otherwise be disclosed in the Prospectus, the Company has not
                  (i) issued or granted any securities, (ii) incurred any
                  material liability or obligation, direct or contingent, other
                  than liabilities and obligations which were incurred in the
                  ordinary course of business, (iii) entered into any material
                  transaction not in the ordinary course of business or (iv)
                  declared or paid any dividend on its capital stock.

                           (y) The Company (i) makes and keeps accurate books
                  and records and (ii) maintains internal accounting controls
                  which provide reasonable assurance that (A) transactions are
                  executed in accordance with management's authorization, (B)
                  transactions are recorded as necessary to permit preparation
                  of its financial statements and to maintain accountability for
                  its assets, (C) access to its assets is permitted only in
                  accordance with management's authorization and (D) the
                  reported assets of the Company set forth in its books and
                  records are compared with existing assets at reasonable
                  intervals.

                           (z) The Company is not (i) in violation of its
                  charter or by-laws, (ii) in default, and no event has occurred
                  which, with notice or lapse of time or both, would constitute
                  such a default, in the due performance or observance of any
                  term, covenant or condition contained in any indenture,
                  mortgage, deed of trust, loan agreement or other agreement or
                  instrument to which it is a party or by which it is bound or
                  to which any of its properties or assets is subject, except
                  where such default would not have a Material Adverse Effect or
                  (iii) in violation of any law, ordinance, governmental rule,
                  regulation or court decree to which it or its property or
                  assets may be subject, except where such violation would not
                  have a Material Adverse Effect. The Company has not failed to
                  obtain any license, permit, certificate, franchise or other
                  governmental authorization or permit necessary to the
                  ownership of its property or to the conduct of its business,
                  except where such failure would not have a Material Adverse
                  Effect.

                           (aa) Neither the Company nor any director, officer,
                  agent, employee or other person associated with or acting on
                  behalf of the Company, has (i) used any corporate funds for
                  any unlawful contribution, gift, entertainment or other
                  unlawful expense relating to political activity; (ii) made any
                  direct or indirect unlawful payment to any foreign or domestic
                  government official or employee from corporate funds; (iii)
                  violated or is in violation of any provision of the Foreign
                  Corrupt Practices Act of 1977; or (iv) made any bribe, rebate,
                  payoff, influence payment, kickback or other unlawful payment.

                           (bb) The Company is not an "investment company"
                  within the meaning of such term under the Investment Company
                  Act of 1940, as amended, and the rules and regulations of the
                  Commission thereunder.
<PAGE>

                           (cc) There are no contracts, agreements or
                  understandings between the Company and any person that would
                  give rise to a valid claim against the Company or any
                  Underwriter for a brokerage commission, finder's fee or other
                  like payment in connection with this offering.

                           (dd) Except as described in the Prospectus, all of
                  the current versions of the Company's products will record,
                  store, process, calculate and present calendar dates falling
                  after January 1, 2000, and will calculate any information
                  dependent on or relating to such dates in the same manner, and
                  with the same functionality, data integrity and performance,
                  as the products recorded, stored, processed, calculated and
                  presented calendar dates on or before December 31, 1999, or
                  calculated any information dependent on or relating to such
                  dates (herein collectively called "Year 2000 Compliant"). The
                  Company has not experienced any material Year 2000 Compliance
                  problems with the current versions of its products.

                  2. Representations, Warranties and Agreements of the Selling
Shareholders. Each Selling Shareholder severally represents, warrants and agrees
that:

                           (a) The Selling Shareholder has, and immediately
                  prior to the Delivery Date (as defined in Section 5 hereof)
                  the Selling Shareholder will have good and valid title to the
                  shares of Stock to be sold by the Selling Shareholder
                  hereunder on such date, free and clear of all liens,
                  encumbrances, equities or claims; and upon delivery of such
                  shares and payment therefor pursuant hereto, good and valid
                  title to such shares, free and clear of all liens,
                  encumbrances, equities or claims, will pass to the several
                  Underwriters.

                           (b) The Selling Shareholder has placed in custody
                  under a custody agreement and power of attorney (the "Custody
                  Agreement and Power of Attorney" and, together with all other
                  similar agreements executed by the other Selling Shareholders,
                  the "Custody Agreements and Powers of Attorney") with the
                  Company, as custodian (the "Custodian"), for delivery under
                  this Agreement, certificates in negotiable form (with
                  signature guaranteed by a commercial bank or trust company
                  having an office or correspondent in the United States or a
                  member firm of the New York or American Stock Exchanges)
                  representing the shares of Stock to be sold by the Selling
                  Shareholder hereunder, and the Selling Shareholder has duly
                  and irrevocably executed and delivered a power of attorney
                  appointing the Custodian and one or more other persons, as
                  attorneys-in-fact, with full power of substitution, and with
                  full authority (exercisable by any one or more of them) to
                  execute and deliver this Agreement and to take such other
                  action as may be necessary or desirable to carry out the
                  provisions hereof on behalf of the Selling Shareholder.

                           (c) The Selling Shareholder has full right, power and
                  authority to enter into this Agreement and the Custody
                  Agreement and Power of
<PAGE>

                  Attorney; the execution, delivery and performance of this
                  Agreement and the Custody Agreement and Power of Attorney by
                  the Selling Shareholder and the consummation by the Selling
                  Shareholder of the transactions contemplated hereby and
                  thereby will not conflict with or result in a breach or
                  violation of any of the terms or provisions of, or constitute
                  a default under any material indenture, mortgage, deed of
                  trust, loan agreement or other material agreement or
                  instrument to which the Selling Shareholder, if applicable, is
                  a party or by which the Selling Shareholder is bound or to
                  which any of the property or assets of the Selling Shareholder
                  is subject, nor will such actions result in any violation of
                  the provisions of the charter or by-laws of the Selling
                  Shareholder or any statute or any order, rule or regulation of
                  any court or governmental agency or body having jurisdiction
                  over the Selling Shareholder or the property or assets of the
                  Selling Shareholder; and, except for the registration of the
                  Stock under the Securities Act and such consents, approvals,
                  authorizations, registrations or qualifications as may be
                  required under the Exchange Act and applicable state
                  securities laws in connection with the purchase and
                  distribution of the Stock by the Underwriters, no consent,
                  approval, authorization or order of, or filing or registration
                  with, any such court or governmental agency or body is
                  required for the execution, delivery and performance of this
                  Agreement or the Custody Agreement and Power of Attorney by
                  the Selling Shareholder and the consummation by the Selling
                  Shareholder of the transactions contemplated hereby and
                  thereby.

                           (d) To the knowledge of any such Selling Shareholder,
                  the Registration Statement and the Prospectus and any further
                  amendments or supplements to the Registration Statement or the
                  Prospectus will, when they become effective or are filed with
                  the Commission, as the case may be, do not and will not, as of
                  the applicable effective date (as to the Registration
                  Statement and any amendment thereto) and as of the applicable
                  filing date (as to the Prospectus and any amendment or
                  supplement thereto) contain an untrue statement of a material
                  fact or omit to state a material fact required to be stated
                  therein or necessary to make the statements therein not
                  misleading; provided that no representation or warranty is
                  made as to information contained in or omitted from the
                  Registration Statement or the Prospectus in reliance upon and
                  in conformity with written information furnished to the
                  Company through the Representatives by or on behalf of any
                  Underwriter specifically for inclusion therein.

                           (e) The Selling Shareholder has no reason to believe
                  that the representations and warranties of the Company
                  contained in Section 1 hereof are not materially true and
                  correct, is familiar with the Registration Statement and the
                  Prospectus (as amended or supplemented) and has no knowledge
                  of any material fact, condition or information not disclosed
                  in the Registration Statement, as of the effective date, or
                  the Prospectus (or any amendment or supplement thereto), as of
                  the applicable filing date, which has adversely affected or
                  may adversely affect the business of the Company
<PAGE>

                  and is not prompted to sell shares of Common Stock by any
                  information concerning the Company which is not set forth in
                  the Registration Statement and the Prospectus.

                           (f) The Selling Shareholder has not taken and will
                  not take, directly or indirectly, any action which is designed
                  to or which has constituted or which might reasonably be
                  expected to cause or result in the stabilization or
                  manipulation of the price of any security of the Company to
                  facilitate the sale or resale of the shares of the Stock.

                  3. Purchase of the Stock by the Underwriters. On the basis of
the representations and warranties contained in, and subject to the terms and
conditions of, this Agreement, the Company agrees to sell 2,843,374 shares of
the Firm Stock and each Selling Shareholder hereby agrees to sell the number of
shares of the Firm Stock set opposite the name of such Selling Shareholder in
Schedule 2 hereto, to the several Underwriters and each of the Underwriters,
severally and not jointly, agrees to purchase the number of shares of the Firm
Stock set opposite that Underwriter's name in Schedule 1 hereto. The respective
purchase obligations of the Underwriters with respect to the Firm Stock shall be
rounded among the Underwriters to avoid fractional shares, as the
Representatives may determine.

                  In addition, the Company grants to the Underwriters an option
to purchase up to 637,500 shares of Option Stock. Such option is granted for the
purpose of covering over-allotments in the sale of Firm Stock and is exercisable
as provided in Section 5 hereof. Shares of Option Stock shall be purchased
severally for the account of the Underwriters in proportion to the number of
shares of Firm Stock set opposite the name of such Underwriters in Schedule 1
hereto. The respective purchase obligations of each Underwriter with respect to
the Option Stock shall be adjusted by the Representatives so that no Underwriter
shall be obligated to purchase Option Stock other than in 100 share amounts. The
price of both the Firm Stock and any Option Stock shall be $________ per share.

                  The Company shall not be obligated to deliver any of the Stock
to be delivered on any Delivery Date (as hereinafter defined), as the case may
be, except upon payment for all the Stock to be purchased on such Delivery Date
as provided herein.

                  4. Offering of Stock by the Underwriters. Upon authorization
by the Representatives of the release of the Firm Stock, the several
Underwriters propose to offer the Firm Stock for sale upon the terms and
conditions set forth in the Prospectus.

                  5. Delivery of and Payment for the Stock. Delivery of and
payment for the Firm Stock shall be made at the office of Gibson, Dunn &
Crutcher LLP, 200 Park Avenue, New York, New York 10166, at 10:00 A.M., New York
City time, on the fourth full business day following the date of this Agreement
or at such other date or place as shall be determined by agreement between the
Representatives and the Company. This date and time are sometimes referred to as
the "First Delivery Date." On the First Delivery Date, the Company and the
Selling Shareholders shall deliver or cause to be
<PAGE>

delivered certificates representing the Firm Stock to the Representatives for
the account of each Underwriter against payment to or upon the order of the
Company and the Selling Shareholders of the purchase price by wire transfer in
immediately available funds. Time shall be of the essence, and delivery at the
time and place specified pursuant to this Agreement is a further condition of
the obligation of each Underwriter hereunder. Upon delivery, the Firm Stock
shall be registered in such names and in such denominations as the
Representatives shall request in writing not less than two full business days
prior to the First Delivery Date. For the purpose of expediting the checking and
packaging of the certificates for the Firm Stock, the Company and the Selling
Shareholders shall make the certificates representing the Firm Stock available
for inspection by the Representatives in New York, New York, not later than 2:00
P.M., New York City time, on the business day prior to the First Delivery Date.

                  The option granted in Section 3 will expire 30 days after the
date of this Agreement and may be exercised in whole or in part from time to
time by written notice being given to the Company by the Representatives. Such
notice shall set forth the aggregate number of shares of Option Stock as to
which the option is being exercised, the names in which the shares of Option
Stock are to be registered, the denominations in which the shares of Option
Stock are to be issued and the date and time, as determined by the
Representatives, when the shares of Option Stock are to be delivered; provided,
however, that this date and time shall not be earlier than the First Delivery
Date nor earlier than the second business day after the date on which the option
shall have been exercised nor later than the fifth business day after the date
on which the option shall have been exercised. The date and time the shares of
Option Stock are delivered are sometimes referred to as a "Second Delivery Date"
and the First Delivery Date and any Second Delivery Date are sometimes each
referred to as a "Delivery Date".

                  Delivery of and payment for the Option Stock shall be made at
the place specified in the first sentence of the first paragraph of this Section
5 (or at such other place as shall be determined by agreement between the
Representatives and the Company) at 10:00 A.M., New York City time, on such
Second Delivery Date. On such Second Delivery Date, the Company shall deliver or
cause to be delivered the certificates representing the Option Stock to the
Representatives for the account of each Underwriter against payment to or upon
the order of the Company of the purchase price by wire transfer in immediately
available funds. Time shall be of the essence, and delivery at the time and
place specified pursuant to this Agreement is a further condition of the
obligation of each Underwriter hereunder. Upon delivery, the Option Stock shall
be registered in such names and in such denominations as the Representatives
shall request in the aforesaid written notice. For the purpose of expediting the
checking and packaging of the certificates for the Option Stock, the Company
shall make the certificates representing the Option Stock available for
inspection by the Representatives in New York, New York, not later than 2:00
P.M., New York City time, on the business day prior to such Second Delivery
Date.
<PAGE>

                  6. Further Agreements of the Company. The Company agrees:

                           (a) To prepare the Prospectus in a form approved by
                  the Representatives and to file such Prospectus pursuant to
                  Rule 424(b) under the Securities Act not later than the
                  Commission's close of business on the second business day
                  following the execution and delivery of this Agreement or, if
                  applicable, such earlier time as may be required by Rule
                  430A(a)(3) under the Securities Act; to make no further
                  amendment or any supplement to the Registration Statement or
                  to the Prospectus except as permitted herein; to advise the
                  Representatives, promptly after it receives notice thereof, of
                  the time when any amendment to the Registration Statement has
                  been filed or becomes effective or any supplement to the
                  Prospectus or any amended Prospectus has been filed and to
                  furnish the Representatives with copies thereof; to advise the
                  Representatives, promptly after it receives notice thereof, of
                  the issuance by the Commission of any stop order or of any
                  order preventing or suspending the use of any Preliminary
                  Prospectus or the Prospectus, of the suspension of the
                  qualification of the Stock for offering or sale in any
                  jurisdiction, of the initiation or threatening of any
                  proceeding for any such purpose, or of any request by the
                  Commission for the amending or supplementing of the
                  Registration Statement or the Prospectus or for additional
                  information; and, in the event of the issuance of any stop
                  order or of any order preventing or suspending the use of any
                  Preliminary Prospectus or the Prospectus or suspending any
                  such qualification, to use promptly its best efforts to obtain
                  its withdrawal.

                           (b) To furnish promptly to each of the
                  Representatives and to counsel for the Underwriters a signed
                  copy of the Registration Statement as originally filed with
                  the Commission, and each amendment thereto filed with the
                  Commission, including all consents and exhibits filed
                  therewith.

                           (c) To deliver promptly to the Representatives such
                  number of the following documents as the Representatives shall
                  reasonably request: (i) conformed copies of the Registration
                  Statement as originally filed with the Commission and each
                  amendment thereto (in each case excluding exhibits other than
                  this Agreement and the computation of per share earnings) and,
                  (ii) each Preliminary Prospectus, the Prospectus and any
                  amended or supplemented Prospectus and, if the delivery of a
                  prospectus is required at any time after the Effective Time in
                  connection with the offering or sale of the Stock and if at
                  such time any events shall have occurred as a result of which
                  the Prospectus as then amended or supplemented would include
                  an untrue statement of a material fact or omit to state any
                  material fact necessary in order to make the statements
                  therein, in the light of the circumstances under which they
                  were made when such Prospectus is delivered, not misleading,
                  or, if for any other reason it shall be necessary to amend or
                  supplement the Prospectus in order to comply with the
                  Securities Act, to notify the Representatives and, upon their
                  request, to file such document and to prepare and furnish
                  without charge to each Underwriter and
<PAGE>

                  to any dealer in securities as many copies as the
                  Representatives may from time to time reasonably request of an
                  amended or supplemented Prospectus which will correct such
                  statement or omission or effect such compliance.

                           (d) To file promptly with the Commission any
                  amendment to the Registration Statement or the Prospectus or
                  any supplement to the Prospectus that may, in the judgment of
                  the Company or the Representatives, be required by the
                  Securities Act or requested by the Commission.

                           (e) Prior to filing with the Commission any amendment
                  to the Registration Statement or supplement to the Prospectus
                  or any Prospectus pursuant to Rule 424 of the Rules and
                  Regulations, to furnish a copy thereof to the Representatives
                  and counsel for the Underwriters and obtain the consent of the
                  Representatives to the filing.

                           (f) As soon as practicable after the Effective Date
                  (but in no event later than 45 days after the first
                  anniversary of the end of the fiscal quarter following the
                  effective date of the Registration Statement, or 90 days if
                  such period is a fiscal year), to make generally available to
                  the Company's security holders and to deliver to the
                  Representatives an earnings statement of the Company (which
                  need not be audited) complying with Section 11(a) of the
                  Securities Act and the Rules and Regulations (including, at
                  the option of the Company, Rule 158).

                           (g) For a period of three years following the
                  Effective Date, to furnish to the Representatives copies of
                  all materials furnished by the Company to its shareholders and
                  all public reports and all reports and financial statements
                  furnished by the Company to the Nasdaq National Market or to
                  any national securities exchange upon which the Common Stock
                  may be listed pursuant to requirements of or agreements with
                  such exchange, or to the Commission pursuant to the Exchange
                  Act or any rule or regulation of the Commission thereunder.

                           (h) Promptly from time to time to take such action as
                  the Representatives may reasonably request to qualify the
                  Stock for offering and sale under the securities laws of such
                  jurisdictions as the Representatives may request and to comply
                  with such laws so as to permit the continuance of sales and
                  dealings therein in such jurisdictions for as long as may be
                  necessary to complete the distribution of the Stock; provided,
                  that, in connection therewith, the Company shall not be
                  required to qualify as a foreign corporation or to file a
                  general consent to service of process in any jurisdiction.

                           (i) For a period of 90 days from the date of the
                  Prospectus, not to, directly or indirectly, (1) offer for
                  sale, sell, pledge or otherwise dispose of (or enter into any
                  transaction or device which is designed to, or could be
                  expected to, result in the disposition by any person at any
                  time in the future
<PAGE>

                  of) any shares of Common Stock or securities convertible into
                  or exchangeable for Common Stock (other than the Stock and
                  shares issued pursuant to the 1998 Plan, the Company's 2000
                  Employee Stock Purchase Plan or pursuant to currently
                  outstanding options, warrants or rights), or sell or grant
                  options, rights or warrants with respect to any shares of
                  Common Stock or securities convertible into or exchangeable
                  for Common Stock (other than the grant of options pursuant to
                  the 1998 Plan), or (2) enter into any swap or other
                  derivatives transaction that transfers to another, in whole or
                  in part, any of the economic benefits or risks of ownership of
                  such shares of Common Stock, whether any such transaction
                  described in clause (1) or (2) above is to be settled by
                  delivery of Common Stock or other securities, in cash or
                  otherwise, in each case without the prior written consent of
                  Lehman Brothers Inc.; and to cause each executive officer,
                  director and certain shareholders of the Company to furnish to
                  the Representatives, prior to the First Delivery Date, a
                  letter or letters, in form and substance satisfactory to
                  counsel for the Underwriters, pursuant to which each such
                  person shall agree not to, directly or indirectly, (1) offer
                  for sale, sell, pledge or otherwise dispose of (or enter into
                  any transaction or device which is designed to, or could be
                  expected to, result in the disposition by any person at any
                  time in the future of) any shares of Common Stock or
                  securities convertible into or exchangeable for Common Stock
                  or (2) enter into any swap or other derivatives transaction
                  that transfers to another, in whole or in part, any of the
                  economic benefits or risks of ownership of such shares of
                  Common Stock, whether any such transaction described in clause
                  (1) or (2) above is to be settled by delivery of Common Stock
                  or other securities, in cash or otherwise, in each case for a
                  period of 90 days from the date of the Prospectus, without the
                  prior written consent of Lehman Brothers Inc (subject to the
                  proviso contained in Section 7(a) hereof).

                           (j) Prior to the Effective Date, to apply for the
                  inclusion of the Stock on the Nasdaq National Market System
                  and to use its best efforts to effect that quotation, subject
                  only to official notice of issuance prior to the First
                  Delivery Date.

                           (k) To apply the net proceeds from the sale of the
                  Stock as set forth in the Prospectus under the caption "Use of
                  Proceeds."

                           (l) To take such steps as shall be necessary to
                  ensure that the Company shall not become an "investment
                  company" within the meaning of such term under the Investment
                  Company Act of 1940 and the rules and regulations of the
                  Commission thereunder.

                           (m) In connection with the Directed Share Program, to
                  ensure in accordance with the Conduct Rules of the NASD that
                  the Directed Shares are not sold, transferred, assigned,
                  pledged or hypothecated for a period of 90 days following the
                  Effective Date and to direct the transfer agent that transfer
                  restrictions be placed on the stock certificates of the
                  Participants in
<PAGE>

                  the Directed Share Program identified by Lehman Brothers Inc.
                  as needing to be so restricted.

                           (n) To comply with all applicable securities and
                  other applicable laws, rules and regulations in each foreign
                  jurisdiction in which the Directed Shares are offered in
                  connection with the Directed Share Program.

                  7. Further Agreements of the Selling Shareholders. Each
Selling Shareholder agrees:

                           (a) Without the prior written consent of Lehman
                  Brothers Inc. on behalf of the Representatives, not to offer,
                  sell or grant any option for the sale or otherwise dispose of
                  (or enter into any transaction which is designed to, or could
                  be expected to result in the disposition by any person at any
                  time in the future of) (i) any shares of Common Stock or (ii)
                  any securities convertible into or exercisable for shares of
                  Common Stock, owned by such Selling Shareholder or with
                  respect to which such Selling Shareholder has the power of
                  disposition, whether directly or indirectly (collectively, the
                  "Stock") for a period of 90 days subsequent to the date of the
                  Prospectus; provided, however, that if the market price of the
                  Company's Common Stock increases 20% or more from the per
                  share price at which the shares of Firm Stock are offered to
                  the public on the date of the Prospectus, the Selling
                  Shareholders may sell up to 50% of their remaining shares
                  after 45 days from the date of the Prospectus.

                           (b) That the Stock to be sold by the Selling
                  Shareholder hereunder, which is represented by the
                  certificates held in custody for the Selling Shareholder, is
                  subject to the interest of the Underwriters and the other
                  Selling Shareholders thereunder, that the arrangements made by
                  the Selling Shareholder for such custody are to that extent
                  irrevocable, and that the obligations of the Selling
                  Shareholder hereunder shall not be terminated by any act of
                  the Selling Shareholder, by operation of law, by the death or
                  incapacity of any individual Selling Shareholder or, in the
                  case of a trust, by the death or incapacity of any executor or
                  trustee or the termination of such trust, or the occurrence of
                  any other event.

                           (c) To deliver to the Representatives prior to the
                  First Delivery Date a properly completed and executed United
                  States Treasury Department Form W-8 (if the Selling
                  Shareholder is a non-United States person) or Form W-9 (if the
                  Selling Shareholder is a United States person).

                  8. Agreements of Comverse. Comverse agrees, for a period of 90
days from the date of the Prospectus, not to, directly or indirectly, (1) offer
for sale, sell, pledge or otherwise dispose of (or enter into any transaction or
device which is designed to, or could be expected to, result in the disposition
by any person at any time in the future of) any shares of Common Stock or
securities convertible into or exchangeable for Common Stock or (2) enter into
any swap or other derivatives transaction that transfers to
<PAGE>

another, in whole or in part, any of the economic benefits or risks of ownership
of such shares of Common Stock, whether any such transaction described in clause
(1) or (2) above is to be settled by delivery of Common Stock or other
securities, in cash or otherwise, in each case without the prior written consent
of Lehman Brothers Inc; provided, however, that Comverse may sell shares of the
Company's Common Stock to a purchaser or purchasers of the share who agree to be
bound by the terms of this Section 8.

                  9. Expenses. The Company agrees to pay (a) the costs incident
to the authorization, issuance, sale and delivery of the Stock and any taxes
payable in that connection; (b) the costs incident to the preparation, printing
and filing under the Securities Act of the Registration Statement and any
amendments and exhibits thereto; (c) the costs of distributing the Registration
Statement as originally filed and each amendment thereto and any post-effective
amendments thereof (including, in each case, exhibits), any Preliminary
Prospectus, the Prospectus and any amendment or supplement to the Prospectus,
all as provided in this Agreement; (d) the filing fees incident to securing any
required review by the NASD of the terms of sale of the Stock; (e) any
applicable listing or other fees; (f) the fees and expenses of qualifying the
Stock under the securities laws of the several jurisdictions as provided in
Section 5(h) (including filing fees and the fees and expenses of counsel for the
Underwriters relating to such registration and qualification); and (g) all other
costs and expenses incident to the performance of the obligations of the Company
under this Agreement; provided that, except as provided in this Section 9 and in
Section 14, the Underwriters shall pay their own costs and expenses, including
the costs and expenses of their counsel, their own costs and expenses associated
with the road shows and the expenses of advertising any offering of the Stock
made by the Underwriters.

                  10. Conditions of Underwriters' Obligations. The respective
obligations of the Underwriters hereunder are subject to the accuracy, when made
and on each Delivery Date, of the representations and warranties of the Company
contained herein, to the performance by the Company and Comverse of their
respective obligations hereunder, and to each of the following additional terms
and conditions:

                           (a) The Prospectus shall have been timely filed with
                  the Commission in accordance with Section 7(a); no stop order
                  suspending the effectiveness of the Registration Statement or
                  any part thereof shall have been issued and no proceeding for
                  that purpose shall have been initiated or threatened by the
                  Commission; and any request of the Commission for inclusion of
                  additional information in the Registration Statement or the
                  Prospectus or otherwise shall have been complied with.

                           (b) No Underwriter shall have discovered and
                  disclosed to the Company on or prior to such Delivery Date
                  that the Registration Statement or the Prospectus or any
                  amendment or supplement thereto contains an untrue statement
                  of a fact which, in the reasonable opinion of Gibson, Dunn &
                  Crutcher LLP, counsel for the Underwriters, is material or
                  omits to state a fact which, in the reasonable opinion of such
                  counsel, is material and is
<PAGE>

                  required to be stated therein or is necessary to make the
                  statements therein not misleading.

                           (c) All corporate proceedings and other legal matters
                  incident to the authorization, form and validity of this
                  Agreement, the Stock, the Registration Statement and the
                  Prospectus, and all other legal matters relating to this
                  Agreement and the transactions contemplated hereby shall be
                  reasonably satisfactory in all material respects to counsel
                  for the Underwriters, and the Company shall have furnished to
                  such counsel all documents and information that they may
                  reasonably request to enable them to pass upon such matters.

                           (d) Weil, Gotshal & Manges LLP shall have furnished
                  to the Representatives its written opinion, as counsel to the
                  Company, addressed to the Underwriters and dated such Delivery
                  Date, in form and substance reasonably satisfactory to the
                  Representatives, to the effect that:

                                       (i) the Company is duly qualified to
                           transact business and is in good standing as a
                           foreign corporation in each jurisdiction identified
                           in such opinion;

                                      (ii) the Registration Statement has become
                           effective under the Securities Act, and such counsel
                           is not aware of any stop order suspending the
                           effectiveness of the Registration Statement. To such
                           counsel's knowledge, no proceedings therefor have
                           been initiated or overtly threatened by the
                           Commission and any required filing of the Prospectus
                           and any supplement thereto pursuant to Rule 424(b)
                           under the Securities Act has been made in the manner
                           and within the time period required by such rule;

                                     (iii) the Registration Statement at the
                           time it became effective and the Prospectus and, if
                           applicable, any further amendments or supplements
                           thereto made by the Company prior to such Delivery
                           Date (except for the financial statements and notes
                           thereto and other financial and accounting data
                           included in the Registration Statement or Prospectus,
                           as to which such counsel need express no opinion)
                           comply as to form in all material respects with the
                           requirements of the Securities Act and the Rules and
                           Regulations;

                                      (iv) the statements contained in the
                           Prospectus under the captions "United States Federal
                           Tax Considerations For Non-United States Holders" and
                           "Shares Eligible for Future Sale", in each case
                           insofar as such statements constitute summaries of
                           federal statutes, rules and regulations referred to
                           therein, fairly present the information called for
                           with respect to such federal statutes, rules and
                           regulations and fairly summarize the matters referred
                           to therein in all material respects;
<PAGE>

                                       (v) the execution and delivery by the
                           Company of this Agreement and the performance by the
                           Company of its obligations hereunder will not
                           conflict with or violate any federal or New York law
                           or regulation (other than federal and state
                           securities or blue sky laws, as to which such counsel
                           expresses no opinion); and

                                      (vi) no consent, approval, waiver, license
                           or authorization or other action by or filing with
                           any federal or New York governmental authority is
                           required in connection with the execution and
                           delivery by the Company of this Agreement, the
                           consummation by the Company of the transactions
                           contemplated hereby or the performance by the Company
                           of its obligations hereunder, except for (i) such
                           filings with, approvals of and registrations with the
                           Nasdaq National Market, the National Association of
                           Securities Dealers and the Commission as have been
                           obtained or made under the Securities Act and the
                           Exchange Act and the rules and regulations
                           thereunder, (ii) such as may be required under
                           federal, state securities or blue sky laws (as to
                           which such counsel need express no opinion) and (iii)
                           those already obtained.

                  In rendering such opinion, such counsel may state that its
                  opinion is limited to matters governed by the Federal laws of
                  the United States of America and the laws of the State of New
                  York, and that such counsel is relying, in respect of matters
                  of fact, upon certificates of officers of the Company,
                  provided that such certificates are appended to the opinion
                  being delivered hereunder. Such counsel shall also have
                  furnished to the Representatives a written statement,
                  addressed to the Underwriters and dated such Delivery Date, in
                  form and substance satisfactory to the Representatives, to the
                  effect that (x) such counsel has acted as counsel to the
                  Company in connection with the preparation of the Registration
                  Statement, and (y) based on the foregoing, no facts have come
                  to the attention of such counsel which lead it to believe that
                  the Registration Statement, as of the Effective Date,
                  contained any untrue statement of a material fact or omitted
                  to state a material fact required to be stated therein or
                  necessary in order to make the statements therein not
                  misleading, or that the Prospectus contains any untrue
                  statement of a material fact or omits to state a material fact
                  required to be stated therein or necessary in order to make
                  the statements therein, in light of the circumstances under
                  which they were made, not misleading. The foregoing opinion
                  and statement may be qualified by a statement to the effect
                  that such counsel does not assume any responsibility for the
                  accuracy, completeness or fairness of the statements contained
                  in the Registration Statement or the Prospectus except for the
                  statements made in the Prospectus under the captions "United
                  States Federal Tax Considerations For Non-United States
                  Holders" and "Shares Eligible for Future Sale", insofar as
                  such statements relate to the Stock and concern legal matters.
<PAGE>

                           (e) Sills Cummis Radin Tischman Epstein & Gross, P.A.
                  shall have furnished to the Representatives its written
                  opinion, as New Jersey counsel to the Company, addressed to
                  the Underwriters and dated such Delivery Date, in form and
                  substance reasonably satisfactory to the Representatives, to
                  the effect that:

                                       (i) the Company has been duly
                           incorporated and is validly existing as a corporation
                           in good standing under the laws of the State of New
                           Jersey, and has all corporate power and authority
                           under New Jersey law necessary to own or hold its
                           properties and to conduct the business in which it is
                           engaged;

                                      (ii) the Company has the authorized
                           capitalization as set forth in the Prospectus, and
                           all of the shares of Stock being delivered on such
                           Delivery Date have been duly and validly authorized
                           and issued, are fully paid and non-assessable and
                           conform to the description thereof contained in the
                           Prospectus under the caption "Description of
                           Securities - Common Stock";

                                     (iii) there are no preemptive or other
                           rights to subscribe for or to purchase, nor any
                           restriction upon the voting or transfer of, any
                           shares of the Stock pursuant to the Company's
                           certificate of incorporation or by-laws or any
                           agreement or other instrument known to such counsel;

                                      (iv) this Agreement has been duly
                           authorized, executed and delivered by the Company;

                                       (v) the execution and delivery of this
                           Agreement by the Company and the performance of its
                           obligations hereunder will not conflict with or
                           result in a violation of the provisions of the
                           certificate of incorporation or by-laws of the
                           Company or any New Jersey law or regulation (other
                           than New Jersey blue sky laws as to which such
                           counsel need express no opinion); and

                                      (vi) the statements contained in the
                           Prospectus under the captions "Risk Factors - Certain
                           provisions of our certificate of incorporation and
                           New Jersey law may make it more difficult for you to
                           get a change in control premium" and "Description of
                           Securities," insofar as such statements relate to the
                           law of the State of New Jersey, constitute a fair
                           summary thereof in all material respects.

                  In rendering such opinion, such counsel may state that its
                  opinion is limited to matters governed by the laws of the
                  State of New Jersey, and that such counsel is relying, in
                  respect of matters of fact, upon certificates of officers of
                  the Company, provided that such certificates are appended to
                  the opinion being delivered hereunder.
<PAGE>

                           (f) William F. Sorin shall have furnished to the
                  Representatives a written opinion, as special counsel to the
                  Company, addressed to the Underwriters and dated such Delivery
                  Date, in form and substance reasonably satisfactory to the
                  Representatives, to the effect that:

                                      (i) Ulticom Europe is not a "significant
                           subsidiary" as that term is defined in Rule 405 under
                           the Securities Act;

                                      (ii) the execution and delivery of this
                           Agreement by the Company and the performance of its
                           obligations hereunder will not conflict with or
                           result in a breach or violation of any of the terms
                           or provisions of, or constitute a default under, any
                           indenture, mortgage, deed of trust, loan agreement or
                           other agreement or instrument known to such counsel
                           to which the Company is a party or by which the
                           Company is bound or to which any of the property or
                           assets of the Company is subject;

                                     (iii) to the best of such counsel's
                           knowledge, there are no legal or governmental
                           proceedings pending to which the Company is a party
                           or of which any property or assets of the Company is
                           the subject which, if determined adversely to the
                           Company, might have a Material Adverse Effect; and,
                           to the best of such counsel's knowledge, no such
                           proceedings are threatened or contemplated by
                           governmental authorities or threatened by others;

                                      (iv) to the best of such counsel's
                           knowledge, there are no contracts or other documents
                           which are required to be described in the Prospectus
                           or filed as exhibits to the Registration Statement by
                           the Securities Act or by the Rules and Regulations
                           which have not been so described or filed as exhibits
                           to the Registration Statement; and

                                       (v) except as described in the Prospectus
                           and in the Registration Rights Agreement, dated as of
                           January 1, 2000, by and among the Company and
                           Comverse, to the best of such counsel's knowledge,
                           there are no contracts, agreements or understandings
                           between the Company and any person granting such
                           person the right to require the Company to file a
                           registration statement under the Securities Act with
                           respect to any securities of the Company owned or to
                           be owned by such person or to require the Company to
                           include such securities in the securities registered
                           pursuant to the Registration Statement or in any
                           securities being registered pursuant to any other
                           registration statement filed by the Company under the
                           Securities Act. Except for the options to purchase
                           from the Company, 3,659,472 shares of the Common
                           Stock in the aggregate granted to officers, directors
                           and employees under the 1998 Plan, no options,
                           warrants or other rights to purchase from the
                           Company, agreements or other
<PAGE>

                           obligations of the Company to issue, or rights to
                           convert any obligations of the Company into or
                           exchange any securities of the Company for, shares of
                           capital stock of or ownership interests in the
                           Company are outstanding.

                  In rendering such opinion, such counsel may state that it is
                  relying, in respect of matters of fact, upon certificates of
                  officers of the Company, provided that such certificates are
                  appended to the opinion being delivered hereunder.

                           (g) the Representatives shall have received from
                  Gibson, Dunn & Crutcher LLP, counsel for the Underwriters,
                  such opinion or opinions, dated such Delivery Date, with
                  respect to the issuance and sale of the Stock, the
                  Registration Statement, the Prospectus and other related
                  matters as the Representatives may reasonably require, and the
                  Company shall have furnished to such counsel such documents as
                  they reasonably request for the purpose of enabling them to
                  pass upon such matters.

                           (h) At the time of execution of this Agreement, the
                  Representatives shall have received from Deloitte & Touche LLP
                  a letter, in form and substance satisfactory to the
                  Representatives, addressed to the Underwriters and dated the
                  date hereof (i) confirming that they are independent public
                  accountants within the meaning of the Securities Act and are
                  in compliance with the applicable requirements relating to the
                  qualification of accountants under Rule 2-01 of Regulation S-X
                  of the Commission, (ii) stating, as of the date hereof (or,
                  with respect to matters involving changes or developments
                  since the respective dates as of which specified financial
                  information is given in the Prospectus, as of a date not more
                  than five days prior to the date hereof), the conclusions and
                  findings of such firm with respect to the financial
                  information and other matters ordinarily covered by
                  accountants' "comfort letters" to underwriters in connection
                  with registered public offerings.

                           (i) With respect to the letter of Deloitte & Touche
                  LLP referred to in the preceding paragraph and delivered to
                  the Representatives concurrently with the execution of this
                  Agreement (the "initial letter"), the Company shall have
                  furnished to the Representatives a letter (the "bring-down
                  letter") of such accountants, addressed to the Underwriters
                  and dated such Delivery Date (i) confirming that they are
                  independent public accountants within the meaning of the
                  Securities Act and are in compliance with the applicable
                  requirements relating to the qualification of accountants
                  under Rule 2-01 of Regulation S-X of the Commission, (ii)
                  stating, as of the date of the bring-down letter (or, with
                  respect to matters involving changes or developments since the
                  respective dates as of which specified financial information
                  is given in the Prospectus, as of a date not more than five
                  days prior to the date of the bring-down letter), the
                  conclusions and findings of such firm with respect to the
                  financial information and other matters covered
<PAGE>

                  by the initial letter and (iii) confirming in all material
                  respects the conclusions and findings set forth in the initial
                  letter.

                           (j) The Company shall have furnished to the
                  Representatives a certificate, dated such Delivery Date, of
                  its chief executive officer and its chief financial officer
                  stating that:

                                       (i) the representations, warranties and
                           agreements of the Company in Section 1 are true and
                           correct as of such Delivery Date; the Company has
                           complied with all its agreements contained herein;
                           and the conditions set forth in Sections 10(a) and
                           10(k) have been fulfilled; and

                                      (ii) they have carefully examined the
                           Registration Statement and the Prospectus and, in
                           their opinion (A) as of the Effective Date, the
                           Registration Statement and Prospectus did not include
                           any untrue statement of a material fact and did not
                           omit to state a material fact required to be stated
                           therein or necessary to make the statements therein
                           not misleading, and (B) since the Effective Date, no
                           event has occurred which should have been set forth
                           in a supplement or amendment to the Registration
                           Statement or the Prospectus which has not been so set
                           forth.

                           (k) (i) The Company shall not have sustained, since
                  the date of the latest audited financial statements included
                  in the Prospectus, any loss or interference with its business
                  from fire, explosion, flood or other calamity, whether or not
                  covered by insurance, or from any labor dispute or court or
                  governmental action, order or decree, otherwise than as set
                  forth or contemplated in the Prospectus or (ii) since such
                  date, there shall not have been any change in the capital
                  stock (other than the stock dividend of 2.2727 shares for each
                  outstanding share of Common Stock which was declared and paid
                  on March 13, 2000) or long-term debt of the Company or any
                  change, or any development involving a prospective change, in
                  or affecting the general affairs, management, financial
                  position, stockholders' equity or results of operations of the
                  Company, otherwise than as set forth or contemplated in the
                  Prospectus, the effect of which, in any such case described in
                  clause (i) or (ii), is, in the judgment of the
                  Representatives, so material and adverse as to make it
                  impracticable or inadvisable to proceed with the public
                  offering or the delivery of the Stock being delivered on such
                  Delivery Date on the terms and in the manner contemplated in
                  the Prospectus.

                           (l) Each Selling Shareholder (or the Custodian or one
                  or more attorneys-in-fact on behalf of the Selling
                  Shareholders) shall have furnished to the Representatives on
                  the Delivery Date a certificate, dated such Delivery Date,
                  signed by, or on behalf of, the Selling Shareholder (or the
                  Custodian or one or more attorneys-in-fact) stating that the
                  representations, warranties and
<PAGE>

                  agreements of the Selling Shareholder contained herein are
                  true and correct as of such Delivery Date and that the Selling
                  Shareholder has complied with all agreements contained herein
                  to be performed by the Selling Shareholder at or prior to such
                  Delivery Date.

                           (m) Subsequent to the execution and delivery of this
                  Agreement there shall not have occurred any of the following:
                  (i) trading in securities generally on the New York Stock
                  Exchange or the Nasdaq National Market or in the
                  over-the-counter market, or trading in any securities of the
                  Company on any exchange or in the over-the-counter market, (A)
                  shall have been suspended and such suspension makes it, in the
                  reasonable judgment of the Representatives, impracticable or
                  inadvisable to proceed with the public offering or delivery of
                  the Stock being delivered on such Delivery Date on the terms
                  and in the manner contemplated in the Prospectus, or (B)
                  minimum prices shall have been established on any such
                  exchange or such market by the Commission, by such exchange or
                  by any other regulatory body or governmental authority having
                  jurisdiction, (ii) a banking moratorium shall have been
                  declared by Federal or state authorities, (iii) the United
                  States shall have become engaged in hostilities, there shall
                  have been an escalation in hostilities involving the United
                  States or there shall have been a declaration of a national
                  emergency or war by the United States or (iv) there shall have
                  occurred such a material adverse change in general economic,
                  political or financial conditions (or the effect of
                  international conditions on the financial markets in the
                  United States shall be such) as to make it, in the judgment of
                  the Representatives, impracticable or inadvisable to proceed
                  with the public offering or delivery of the Stock being
                  delivered on such Delivery Date on the terms and in the manner
                  contemplated in the Prospectus.

                           (n) The Nasdaq National Market System shall have
                  approved the Stock for quotation, subject only to official
                  notice of issuance and evidence of satisfactory distribution.

All opinions, letters, evidence and certificates mentioned above or elsewhere in
this Agreement shall be deemed to be in compliance with the provisions hereof
only if they are in form and substance reasonably satisfactory to counsel for
the Underwriters.

                  11.      Indemnification and Contribution.

                           (a) The Company shall indemnify and hold harmless
                  each Underwriter, its officers and employees and each person,
                  if any, who controls any Underwriter within the meaning of the
                  Securities Act, from and against any loss, claim, damage or
                  liability, joint or several, or any action in respect thereof
                  (including, but not limited to, any loss, claim, damage,
                  liability or action relating to purchases and sales of Stock),
                  to which that Underwriter, officer, employee or controlling
                  person may become subject, under the Securities Act or
                  otherwise, insofar as such loss, claim, damage,
<PAGE>

                  liability or action arises out of, or is based upon, (i) any
                  untrue statement or alleged untrue statement of a material
                  fact contained (A) in any Preliminary Prospectus, the
                  Registration Statement or the Prospectus or in any amendment
                  or supplement thereto or (B) in any materials or information
                  provided to investors by, or with the approval of, the Company
                  in connection with the marketing of the offering of the Stock,
                  including any roadshow or investor presentations made to
                  investors by the Company (whether in person or electronically)
                  (the "Marketing Materials"), (ii) the omission or alleged
                  omission to state in any Preliminary Prospectus, the
                  Registration Statement or the Prospectus, or in any amendment
                  or supplement thereto, or in any Marketing Materials, any
                  material fact required to be stated therein or necessary to
                  make the statements therein not misleading or (iii) any act or
                  failure to act or any alleged act or failure to act by any
                  Underwriter in connection with, or relating in any manner to,
                  the Stock or the offering contemplated hereby, and which is
                  included as part of or referred to in any loss, claim, damage,
                  liability or action arising out of or based upon matters
                  covered by clause (i) or (ii) above (provided that the Company
                  shall not be liable under this clause (iii) to the extent that
                  it is determined in a final judgment by a court of competent
                  jurisdiction that such loss, claim, damage, liability or
                  action resulted directly from any such acts or failures to act
                  undertaken or omitted to be taken by such Underwriter through
                  its gross negligence or willful misconduct), and shall
                  reimburse each Underwriter and each such officer, employee or
                  controlling person promptly upon demand for any legal or other
                  expenses reasonably incurred by that Underwriter, officer,
                  employee or controlling person in connection with
                  investigating or defending or preparing to defend against any
                  such loss, claim, damage, liability or action as such expenses
                  are incurred; provided, however, that the Company shall not be
                  liable in any such case to the extent that any such loss,
                  claim, damage, liability or action arises out of, or is based
                  upon, any untrue statement or alleged untrue statement or
                  omission or alleged omission made in any Preliminary
                  Prospectus, the Registration Statement or the Prospectus, or
                  in any such amendment or supplement, in reliance upon and in
                  conformity with written information concerning such
                  Underwriter furnished to the Company through the
                  Representatives by or on behalf of any Underwriter
                  specifically for inclusion therein which information consists
                  solely of the information specified in Section 11(f). The
                  indemnification agreement set forth in this paragraph 11(a)
                  with respect to any Preliminary Prospectus shall not inure to
                  the benefit of any Underwriter from whom the person asserting
                  any such losses, claims, damages, liabilities or expenses
                  purchased the Stock which is the subject thereof (or to the
                  benefit of any person controlling such Underwriter) if at or
                  prior to the written confirmation of the sale of such Stock a
                  copy of the Prospectus (or the Prospectus as amended or
                  supplemented) was not sent or delivered to such person and the
                  untrue statement or omission of a material fact contained in
                  such Preliminary Prospectus was corrected in the Prospectus
                  (or in the Prospectus as amended or supplemented) in any case
                  where such delivery is required by the
<PAGE>

                  Securities Act, unless the failure is the result of
                  noncompliance by the Company with paragraph 7(a) hereof. The
                  foregoing indemnity agreement is in addition to any liability
                  which the Company or Comverse may otherwise have to any
                  Underwriter or to any officer, employee or controlling person
                  of that Underwriter.

                           (b) The Selling Shareholder, severally in proportion
                  to the number of shares of Stock to be sold by each of them
                  hereunder, shall indemnify and hold harmless each Underwriter,
                  its officer and employees, and each person, if any, who
                  controls any Underwriter within the meaning of the Securities
                  Act, from and against any loss, claim, damage or liability,
                  joint or several, or any action in respect thereof (including,
                  but not limited to, any loss, claim, damage, liability or
                  action relating to purchases and sales of Stock), to which
                  that Underwriter, officer, employee or controlling person may
                  become subject, under the Securities Act or otherwise, insofar
                  as such loss, claim, damage, liability or action arises out
                  of, or is based upon, (i) any untrue statement or alleged
                  untrue statement of a material fact contained in any
                  Preliminary Prospectus, the Registration Statement or the
                  Prospectus, or in any amendment or supplement thereto, or (ii)
                  the omission or alleged omission to state in any Preliminary
                  Prospectus, the Registration Statement or the Prospectus, or
                  in any amendment or supplement thereto, any material fact
                  required to be stated therein or necessary to make the
                  statements therein not misleading, but in each case only to
                  the extent that the untrue statement or alleged untrue
                  statement or omission was made in reliance upon and in
                  confomity with written information concerning such Selling
                  Shareholder furnished to the Company by or on behalf of that
                  Selling Shareholder specifically for inclusion therein and
                  shall reimburse each Underwriter, its officers and employees
                  and each such controlling person for any legal or other
                  expenses reasonably incurred by that Underwriter, its officers
                  and employees or controlling person in connection with
                  investigating or defending or preparing to defend against any
                  such loss, claim, damage, liability or action as such expenses
                  are incurred. Notwithstanding the foregoing sentence, the
                  aggregate liability of any Selling Shareholder pursuant to the
                  provisions of this paragraph shall be limited to an amount
                  equal to the aggregate purchase price, less underwriting
                  discounts and commissions, received by such Selling
                  Shareholder from the sale of such Selling Shareholder's Stock
                  hereunder. The foregoing indemnity agreement is in addition to
                  any liability which the Selling Shareholders may otherwise
                  have to any Underwriter or any officer, employee or
                  controlling person of that Underwriter.

                           (c) Each Underwriter, severally and not jointly,
                  shall indemnify and hold harmless the Company, its officers
                  and employees, each of its directors (including any person
                  who, with his or her consent, is named in the Registration
                  Statement as about to become a director of the Company), and
                  each person, if any, who controls the Company within the
                  meaning of the Securities Act, from and against any loss,
                  claim, damage or liability, joint or
<PAGE>

                  several, or any action in respect thereof, to which the
                  Company or any such director, officer or controlling person
                  may become subject, under the Securities Act or otherwise,
                  insofar as such loss, claim, damage, liability or action
                  arises out of, or is based upon, (i) any untrue statement or
                  alleged untrue statement of a material fact contained (A) in
                  any Preliminary Prospectus, the Registration Statement or the
                  Prospectus or in any amendment or supplement thereto, or (B)
                  in any Marketing Materials or (ii) the omission or alleged
                  omission to state in any Preliminary Prospectus, the
                  Registration Statement or the Prospectus, or in any amendment
                  or supplement thereto, or in any Marketing Materials, any
                  material fact required to be stated therein or necessary to
                  make the statements therein not misleading, but in each case
                  only to the extent that the untrue statement or alleged untrue
                  statement or omission was made in reliance upon and in
                  conformity with written information concerning such
                  Underwriter furnished to the Company through the
                  Representatives by or on behalf of that Underwriter
                  specifically for inclusion therein, which information consists
                  solely of the information specified in Section 11(e), and
                  shall reimburse the Company and any such director, officer or
                  controlling person for any legal or other expenses reasonably
                  incurred by the Company or any such director, officer or
                  controlling person in connection with investigating or
                  defending or preparing to defend against any such loss, claim,
                  damage, liability or action as such expenses are incurred. The
                  foregoing indemnity agreement is in addition to any liability
                  which any Underwriter may otherwise have to the Company or any
                  such director, officer, employee or controlling person.

                           (d) Promptly after receipt by an indemnified party
                  under this Section 11 of notice of any claim or the
                  commencement of any action, the indemnified party shall, if a
                  claim in respect thereof is to be made against the
                  indemnifying party under this Section 11, notify the
                  indemnifying party in writing of the claim or the commencement
                  of that action; provided, however, that the failure to notify
                  the indemnifying party shall not relieve it from any liability
                  which it may have under this Section 11 except to the extent
                  it has been materially prejudiced by such failure and;
                  provided further, that the failure to notify the indemnifying
                  party shall not relieve it from any liability which it may
                  have to an indemnified party otherwise than under this Section
                  11. If any such claim or action shall be brought against an
                  indemnified party, and it shall notify the indemnifying party
                  thereof, the indemnifying party shall be entitled to
                  participate therein and, to the extent that it wishes, jointly
                  with any other similarly notified indemnifying party, to
                  assume the defense thereof with counsel reasonably
                  satisfactory to the indemnified party. After notice from the
                  indemnifying party to the indemnified party of its election to
                  assume the defense of such claim or action, the indemnifying
                  party shall not be liable to the indemnified party under this
                  Section 11 for any legal or other expenses subsequently
                  incurred by the indemnified party in connection with the
                  defense thereof other than reasonable costs of investigation;
                  provided, however, that the Representatives shall have the
                  right to employ counsel to represent jointly the
                  Representatives and those
<PAGE>

                  other Underwriters and their respective officers, employees
                  and controlling persons who may be subject to liability
                  arising out of any claim in respect of which indemnity may be
                  sought by the Underwriters against the Company or any Selling
                  Shareholder under this Section 11 if, in the reasonable
                  judgment of the Representatives either (i) there is an actual
                  or potential conflict between the position of the Company or
                  any Selling Shareholder and the Underwriters, (ii) there may
                  be defenses available to it or them that are different from or
                  additional to those available to the Company or any Selling
                  Shareholder (in any of which events the Company or any Selling
                  Shareholder shall not have the right to direct the defense of
                  such action on behalf of the Representative or Representatives
                  with respect to such different defenses) or (iii) the Company
                  or any Selling Shareholder has failed to assume to defense of
                  such action and employ counsel reasonably satisfactory to the
                  Representatives, in any of which events such fees and expenses
                  shall be borne by the Company or any Selling Shareholder. No
                  indemnifying party shall (i) without the prior written consent
                  of the indemnified parties (which consent shall not be
                  unreasonably withheld), settle or compromise or consent to the
                  entry of any judgment with respect to any pending or
                  threatened claim, action, suit or proceeding in respect of
                  which indemnification or contribution may be sought hereunder
                  (whether or not the indemnified parties are actual or
                  potential parties to such claim or action) unless such
                  settlement, compromise or consent includes an unconditional
                  release of each indemnified party from all liability arising
                  out of such claim, action, suit or proceeding, or (ii) be
                  liable for any settlement of any such action effected without
                  its written consent (which consent shall not be unreasonably
                  withheld), but if settled with the consent of the indemnifying
                  party or if there be a final judgment of the plaintiff in any
                  such action, the indemnifying party agrees to indemnify and
                  hold harmless any indemnified party from and against any loss
                  or liability by reason of such settlement or judgment.

                           (e) If the indemnification provided for in this
                  Section 11 shall for any reason be unavailable to or
                  insufficient to hold harmless an indemnified party under
                  Section 11(a) or 11(b) in respect of any loss, claim, damage
                  or liability, or any action in respect thereof, referred to
                  therein, then each indemnifying party shall, in lieu of
                  indemnifying such indemnified party, contribute to the amount
                  paid or payable by such indemnified party as a result of such
                  loss, claim, damage or liability, or action in respect
                  thereof, (i) in such proportion as shall be appropriate to
                  reflect the relative benefits received by the Company and the
                  Selling Shareholders on the one hand and the Underwriters on
                  the other from the offering of the Stock or (ii) if the
                  allocation provided by clause (i) above is not permitted by
                  applicable law, in such proportion as is appropriate to
                  reflect not only the relative benefits referred to in clause
                  (i) above but also the relative fault of the Company and the
                  Selling Shareholders on the one hand, and the Underwriters on
                  the other hand, with respect to the statements or omissions
                  which resulted in such loss, claim, damage or liability, or
                  action in respect thereof, as well as any other
<PAGE>

                  relevant equitable considerations. The relative benefits
                  received by the Company and the Selling Shareholders on the
                  one hand and the Underwriters on the other with respect to
                  such offering shall be deemed to be in the same proportion as
                  the total net proceeds from the offering of the Stock
                  purchased under this Agreement (before deducting expenses)
                  received by the Company and the Selling Shareholders on the
                  one hand, and the total underwriting discounts and commissions
                  received by the Underwriters with respect to the shares of the
                  Stock purchased under this Agreement on the other hand, bear
                  to the total gross proceeds from the offering of the shares of
                  the Stock under this Agreement, in each case as set forth in
                  the table on the cover page of the Prospectus. The relative
                  fault shall be determined by reference to whether the untrue
                  or alleged untrue statement of a material fact or omission or
                  alleged omission to state a material fact relates to
                  information supplied by the Company, the Selling Shareholders
                  or the Underwriters, the intent of the parties and their
                  relative knowledge, access to information and opportunity to
                  correct or prevent such statement or omission. The Company,
                  the Selling Shareholders and the Underwriters agree that it
                  would not be just and equitable if contributions pursuant to
                  this Section 11(e) were to be determined by pro rata
                  allocation (even if the Underwriters were treated as one
                  entity for such purpose) or by any other method of allocation
                  which does not take into account the equitable considerations
                  referred to herein. The amount paid or payable by an
                  indemnified party as a result of the loss, claim, damage or
                  liability, or action in respect thereof, referred to above in
                  this Section 11 shall be deemed to include, for purposes of
                  this Section 11(d), any legal or other expenses reasonably
                  incurred by such indemnified party in connection with
                  investigating or defending any such action or claim.
                  Notwithstanding the provisions of this Section 11(d), no
                  Underwriter shall be required to contribute any amount in
                  excess of the amount by which the total price at which the
                  shares of Stock underwritten by it and distributed to the
                  public were offered to the public exceeds the amount of any
                  damages which such Underwriter has otherwise paid or become
                  liable to pay by reason of any untrue or alleged untrue
                  statement or omission or alleged omission. No person guilty of
                  fraudulent misrepresentation (within the meaning of Section
                  11(f) of the Securities Act) shall be entitled to contribution
                  from any person who was not guilty of such fraudulent
                  misrepresentation. The Underwriters' obligations to contribute
                  as provided in this Section 11(e) are several in proportion to
                  their respective underwriting obligations and not joint.

                           (f) The Underwriters severally confirm and the
                  Company and the Selling Shareholders acknowledge that (i) the
                  statements with respect to the public offering of the Stock by
                  the Underwriters set forth on the cover page of the
                  Prospectus, (ii) the statements with respect to the delivery
                  of the Prospectus set forth on page (i) of the Prospectus, and
                  (iii) the concession and reallowance figures and the
                  discussion concerning over-allotments, stabilization and the
                  factors the Representatives will consider in pricing, all
                  appearing under the caption "Underwriting" in the Prospectus,
                  are correct
<PAGE>

                  and constitute the only information concerning such
                  Underwriters furnished in writing to the Company by or on
                  behalf of the Underwriters specifically for inclusion in the
                  Registration Statement and the Prospectus.

                  12. Defaulting Underwriters. If, on either Delivery Date, any
Underwriter defaults in the performance of its obligations under this Agreement,
the remaining non-defaulting Underwriters shall be obligated to purchase the
Stock which the defaulting Underwriter agreed but failed to purchase on such
Delivery Date in the respective proportions which the number of shares of the
Firm Stock set opposite the name of each remaining non-defaulting Underwriter in
Schedule 1 hereto bears to the total number of shares of the Firm Stock set
opposite the names of all the remaining non-defaulting Underwriters in Schedule
1 hereto; provided, however, that the remaining non-defaulting Underwriters
shall not be obligated to purchase any of the Stock on such Delivery Date if the
total number of shares of the Stock which the defaulting Underwriter or
Underwriters agreed but failed to purchase on such date exceeds 9.09% of the
total number of shares of the Stock to be purchased on such Delivery Date, and
any remaining non-defaulting Underwriter shall not be obligated to purchase more
than 110% of the number of shares of the Stock which it agreed to purchase on
such Delivery Date pursuant to the terms of Section 4. If the foregoing maximums
are exceeded, the remaining non-defaulting Underwriters, or those other
underwriters satisfactory to the Representatives who so agree, shall have the
right, but shall not be obligated, to purchase, in such proportion as may be
agreed upon among them, all the Stock to be purchased on such Delivery Date. If
the remaining Underwriters or other underwriters satisfactory to the
Representatives do not elect to purchase the shares which the defaulting
Underwriter or Underwriters agreed but failed to purchase on such Delivery Date,
this Agreement (or, with respect to the Second Delivery Date, the obligation of
the Underwriters to purchase, and of the Company to sell, the Option Stock)
shall terminate without liability on the part of any non-defaulting Underwriter
or the Company, except that the Company will continue to be liable for the
payment of expenses to the extent set forth in Sections 8 and 13. As used in
this Agreement, the term "Underwriter" includes, for all purposes of this
Agreement unless the context requires otherwise, any party not listed in
Schedule 1 hereto who, pursuant to this Section 12, purchases Firm Stock which a
defaulting Underwriter agreed but failed to purchase.

                  Nothing contained herein shall relieve a defaulting
Underwriter of any liability it may have to the Company for damages caused by
its default. If other underwriters are obligated or agree to purchase the Stock
of a defaulting or withdrawing Underwriter, either the Representatives or the
Company may postpone the Delivery Date for up to seven full business days in
order to effect any changes that in the opinion of counsel for the Company or
counsel for the Underwriters may be necessary in the Registration Statement, the
Prospectus or in any other document or arrangement.

                  13. Termination. The obligations of the Underwriters hereunder
may be terminated by the Representatives by notice given to and received by the
Company and the Selling Shareholders prior to delivery of and payment for the
Firm Stock if, prior to that time, any of the events described in Sections 10(k)
or 10(m), shall have occurred
<PAGE>

or if the Underwriters shall decline to purchase the Stock for any reason
permitted under this Agreement.

                  14. Reimbursement of Underwriters' Expenses. If the Company or
any Selling Shareholder shall fail to tender the Stock for delivery to the
Underwriters by reason of any failure, refusal or inability on the part of the
Company or any Selling Shareholder to perform any agreement on its part to be
performed, or because any other condition of the Underwriters' obligations
hereunder required to be fulfilled by the Company or any Selling Shareholder is
not fulfilled (unless such non-fulfillment is due to any action or inaction by
an Underwriter and other than pursuant to Section 10(m)(iv)), the Company and
the Selling Shareholders will reimburse the Underwriters for all reasonable
out-of-pocket expenses (including reasonable fees and disbursements of counsel)
incurred by the Underwriters in connection with this Agreement and the proposed
purchase of the Stock, and upon demand the Company and the Selling Shareholders
shall pay the full amount thereof to the Representatives. If this Agreement is
terminated pursuant to Section 12 by reason of the default of one or more
Underwriters, neither the Company nor any Selling Shareholder shall be obligated
to reimburse any defaulting Underwriter on account of those expenses.

                  15. Notices, etc. All statements, requests, notices and
agreements hereunder shall be in writing, and:

                           (a) if to the Underwriters, shall be delivered or
                  sent by mail, telex or facsimile transmission to Lehman
                  Brothers Inc., Three World Financial Center, New York, New
                  York 10285, Attention: Syndicate Department (Fax:
                  212-526-6588), with a copy, in the case of any notice pursuant
                  to Section 11(c), to the Director of Litigation, Office of the
                  General Counsel, Lehman Brothers Inc., 3 World Financial
                  Center, 10th Floor, New York, NY 10285;

                           (b) if to the Company or to Comverse, shall be
                  delivered or sent by mail, telex or facsimile transmission to
                  the address of the Company set forth in the Registration
                  Statement, Attention: Shawn Osborne, President and Chief
                  Executive Officer (Fax: (856) 886-2033), with a copy to
                  William F. Sorin, Esq., c/o Comverse Technology, Inc., c/o
                  Comverse Network Systems, Inc., 909 Third Avenue, New York, NY
                  10022 (Fax: (212) 759-7521) and to Weil, Gotshal & Manges LLP,
                  767 Fifth Avenue, New York, NY 10153, Attention: Stephen
                  Besen, Esq. (Fax: (212) 310-8007); and

                           (c) if to any Selling Shareholders, shall be
                  delivered or sent by mail, telex or facsimile transmission to
                  the Custodian or one or more attorneys-in-fact at the
                  address(es) set forth in the Custody Agreement and Power of
                  Attorney with a copy to William F. Sorin, [17 East 89th
                  Street, New York, NY, 10128].

provided, however, that any notice to an Underwriter pursuant to Section 11(c)
shall be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its
<PAGE>

address set forth in its acceptance telex to the Representatives, which address
will be supplied to any other party hereto by the Representatives upon request.
Any such statements, requests, notices or agreements shall take effect at the
time of receipt thereof. The Company and the Selling Shareholders shall be
entitled to act and rely upon any request, consent, notice or agreement given or
made on behalf of the Underwriters by Lehman Brothers Inc. on behalf of the
Representatives and the Company and the Underwriters shall be entitled to act
and rely upon any request, consent, notice or agreement given or made on behalf
of the Selling Shareholders by the Custodian.

                  16. Persons Entitled to Benefit of Agreement. This Agreement
shall inure to the benefit of and be binding upon the Underwriters, the Company,
the Selling Shareholders and their respective successors; provided that Section
8 of this Agreement shall be binding upon Comverse and its successors. This
Agreement and the terms and provisions hereof are for the sole benefit of only
those persons, except that (A) the representations, warranties, indemnities and
agreements of the Company and the Selling Shareholders contained in this
Agreement shall also be deemed to be for the benefit of the person or persons,
if any, who control any Underwriter within the meaning of Section 15 of the
Securities Act and (B) the indemnity agreement of the Underwriters contained in
Section 11(b) of this Agreement shall be deemed to be for the benefit of
directors of the Company, officers of the Company who have signed the
Registration Statement and any person controlling the Company within the meaning
of Section 15 of the Securities Act. Nothing in this Agreement is intended or
shall be construed to give any person, other than the persons referred to in
this Section 16, any legal or equitable right, remedy or claim under or in
respect of this Agreement or any provision contained herein.

                  17. Survival. The respective indemnities, representations,
warranties and agreements of the Company, the Selling Shareholders, Comverse and
the Underwriters contained in this Agreement or made by or on behalf on them,
respectively, pursuant to this Agreement, shall survive the delivery of and
payment for the Stock and shall remain in full force and effect, regardless of
any investigation made by or on behalf of any of them or any person controlling
any of them.

                  18. Definition of the Terms "Business Day" and "Subsidiary".
For purposes of this Agreement, (a) "business day" means each Monday, Tuesday,
Wednesday, Thursday or Friday which is not a day on which banking institutions
in New York are generally authorized or obligated by law or executive order to
close and (b) "subsidiary" has the meaning set forth in Rule 405 of the Rules
and Regulations.
                  19. Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of New York.

                  20. Counterparts. This Agreement may be executed in one or
more counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.
<PAGE>

                  21. Headings. The headings herein are inserted for convenience
of reference only and are not intended to be part of, or to affect the meaning
or interpretation of, this Agreement.
<PAGE>

                  If the foregoing correctly sets forth the agreement among the
Company, the Selling Shareholders, Comverse and the Underwriters, please
indicate your acceptance in the space provided for that purpose below.

                                  Very truly yours,


                                  ULTICOM, INC.


                                  By
                                     -------------------------------------------
                                     Name:
                                     Title:



                                  COMVERSE TECHNOLOGY, INC.


                                  By
                                     -------------------------------------------
                                     Name:
                                     Title:



                                  LIEVRE HOLDINGS LIMITED


                                  By
                                     -------------------------------------------
                                     Name:
                                     Title:



                                  CARMEL VERNIA



                                  ----------------------------------------------


                                  KOBI ALEXANDER



                                  ----------------------------------------------
<PAGE>

                                  SHAWN K. OSBORNE



                                  ----------------------------------------------


                                  DAVID KREINBERG



                                  ----------------------------------------------


                                  WILLIAM F. SORIN



                                  ----------------------------------------------


                                  SACHI GERLITZ



                                  ----------------------------------------------


                                  ZVI BAR-ON



                                  ----------------------------------------------


                                  RON HIRAM



                                  ----------------------------------------------


                                  REX A. McWILLIAMS



                                  ----------------------------------------------
<PAGE>

Accepted:

LEHMAN BROTHERS INC.
CHASE SECURITIES INC.
BEAR, STEARNS & CO. INC.
U.S. BANCORP PIPER JAFFRAY INC.

For themselves and as Representatives
of the several Underwriters named
in Schedule 1 hereto

         By LEHMAN BROTHERS INC.


         By
           ----------------------------------------
                  Authorized Representative

                                   SCHEDULE 1



                                                                  Number
                                                                    of
Underwriters                                                   Firm Shares
------------                                                   -----------
LEHMAN BROTHERS INC. ..................................
CHASE SECURITIES INC. .................................
BEAR, STEARNS & CO. INC. ..............................
U.S. BANCORP PIPER JAFFRAY INC. .......................

                                                               -----------
                                                     Total       2,843,374
<PAGE>

                                   SCHEDULE 2



                                                                        Number
                                                                          of
Selling Shareholders                                                 Firm Shares
--------------------                                                 -----------
LIEVRE HOLDINGS LIMITED .................................              1,227,263
CARMEL VERNIA ...........................................                 40,000
KOBI ALEXANDER ..........................................                 40,000
SHAWN K. OSBORNE ........................................                 25,000
DAVID KREINBERG .........................................                 21,500
WILLIAM F. SORIN ........................................                 21,500
SACHI GERLITZ ...........................................                 16,363
ZVI BAR-ON ..............................................                  5,000
RON HIRAM ...............................................                  5,000
REX A. MCWILLIAMS .......................................                  5,000
                                                                     -----------
                                                          TOTAL        1,406,626

                            LOCK-UP LETTER AGREEMENT




LEHMAN BROTHERS INC.
CHASE SECURITIES INC.
BEAR, STEARNS & CO. INC.
U.S. BANCORP PIPER JAFFRAY INC.
As Representatives of the
  several underwriters
c/o LEHMAN BROTHERS INC.
Three World Financial Center
New York, NY  10285

         Re:      Ulticom, Inc.

Dear Sirs:

                  The undersigned understands that you and certain other firms
propose to enter into an Underwriting Agreement (the "Underwriting Agreement")
providing for the purchase by you and such other firms (the "Underwriters") of
shares of Common Stock, no par value per share (the "Common Shares"), of
Ulticom, Inc. (the "Company") (such Common Shares are hereinafter referred to as
the "Shares") and that the Underwriters propose to reoffer the Shares to the
public (the "Offering").

                  In consideration of the execution of the Underwriting
Agreement by the Underwriters, and for other good and valuable consideration,
the undersigned hereby
<PAGE>

irrevocably agrees that, without the prior written consent of Lehman Brothers
Inc., the undersigned will not, directly or indirectly, (1) offer for sale,
sell, pledge, or otherwise dispose of (or enter into any transaction or device
that is designed to, or could be expected to, result in the disposition by any
person at any time in the future of) any Common Shares (including, without
limitation, Common Shares that may be deemed to be beneficially owned by the
undersigned in accordance with the rules and regulations of the Securities and
Exchange Commission and Common Shares that may be issued upon exercise of any
option or warrant) or securities convertible into or exchangeable for Common
Shares owned by the undersigned on the date of execution of this Lock-Up Letter
Agreement or on the date of the completion of the Offering, or (2) enter into
any swap or other derivatives transaction that transfers to another, in whole or
in part, any of the economic benefits or risks of ownership of such Common
Shares, whether any such transaction described in clause (1) or (2) above is to
be settled by delivery of Common Shares or other securities, in cash or
otherwise, for a period of 90 days after the date of the final Prospectus
relating to the Offering; [provided, however, that if the market price of the
Common Shares increases by 20% or more from the per share price at which the
Shares are offered to the public in the Offeing, the undersigned may sell up to
50% of his, her or its remaining shares after 45 days from the date of the
Offering.]

                  In furtherance of the foregoing, the Company and its transfer
agent are hereby authorized to decline to make any transfer of securities if
such transfer would constitute a violation or breach of this Lock-Up Letter
Agreement.

                  It is understood that, if the Company notifies you that it
does not intend to proceed with the Offering, if the Underwriting Agreement does
not become effective, or if the Underwriting Agreement (other than the
provisions thereof which survive termination) shall terminate or be terminated
prior to payment for and delivery of the Shares, the undersigned will be
released from its obligations under this Lock-Up Letter Agreement.

                  The undersigned understands that the Company and the
Underwriters will proceed with the Offering in reliance on this Lock-Up Letter
Agreement.

                  The undersigned hereby represents and warrants that the
undersigned has full power and authority to enter into this Lock-Up Letter
Agreement and that, upon request, the undersigned will execute any additional
documents necessary in connection with the enforcement hereof. Any obligations
of the undersigned shall be binding upon the heirs, personal representatives,
successors and assigns of the undersigned.


                                             Very truly yours,



                                             By:
                                                --------------------------------
                                                Name:
                                                Title:

Dated:                      , 2000


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