EXHIBIT 4.2

                               ION NETWORKS, INC.

                             1998 STOCK OPTION PLAN

                     1998 U.K. Sub-Plan/U.K. Approved Rules


In pursuance of its powers under the Ion Networks, Inc. 1998 Stock Option Plan
(the "Plan"), the Board of Directors, or a duly appointed committee of the Board
of Directors (the "Committee") of Ion Networks, Inc. (the "Company") has adopted
these rules (the "UK Rules") for the purposes of operating the Plan with regard
to such options ("Options") which the UK Rules are expressed to extend at the
time when the Option is granted. Unless the context requires otherwise, all
expressions used in the UK Rules have the same meaning as the Plan. The Plan, as
supplemented by the UK Rules, is referred to hereinafter as the "Sub-Plan". For
the avoidance of doubt, the terms of the Plan (insofar as they have not been
disapplied by Rule p of the UK Rules) shall form part of the Sub-Plan.

         (a)      The shares over which Options may be granted under the
                  Sub-Plan form part of the ordinary share capital (as defined
                  in Section 832(1) Income and Corporation Taxes Act 1988)
                  ("ICTA 1988") of the Company and must at all times, including
                  the time of grant and the time of exercise, comply with the
                  terms of the Plan and comply with the requirements of
                  paragraphs 10 to 14 Schedule 9 ICTA 1988.

         (b)      The companies participating in this Sub-Plan are the Company
                  and all companies controlled by the Company within the meaning
                  of Section 840 ICTA 1988 ("Subsidiaries").

         (c)      The shares of Common Stock to be acquired on exercise of the
                  Option in accordance with the terms of the Sub-Plan will be:

                  (i)      fully paid up;

                  (ii)     not redeemable;

                  (iii)    not subject to any restrictions other than
                           restrictions which attach to all shares of the same
                           class. For the purpose of this clause, the term
                           "restrictions" includes restrictions which are deemed
                           to attach to the shares under any contract,
                           agreement, arrangement or condition as referred to in
                           paragraph 13 Schedule 9 ICTA 1988.

         (d)      An Option granted under this Sub-Plan shall not be exercisable
                  for more than ten years after the date of grant.






         (e)      To the extent any restrictions or contingencies have been
                  imposed by the Committee under the provisions contained in
                  Paragraph 3 of the Plan, these restrictions or contingencies
                  shall:

                  (i)      be objective and set out in full at the time of grant
                           in the stock option contract referred to at Paragraph
                           11 of the Plan;

                  (ii)     be such that rights to exercise such Option after the
                           fulfillment or attainment of any restrictions or
                           contingencies so specified shall not be dependent on
                           the further discretion of any person; and

                  (iii)    not be capable of amendment, variation or waiver
                           unless an event occurs which causes the Committee
                           reasonably to consider that waived, varied or amended
                           restrictions or contingencies would be a fairer
                           measure of performance and would be no more difficult
                           to satisfy.

         (f)      No Option will be granted to an employee or director under
                  this Sub-Plan, or where an Option has previously been granted,
                  no Option shall be exercised by an optionholder if at that
                  time he has, or any time within the preceding 12 months has
                  had, a material interest for the purposes of Schedule 9 ICTA
                  1988 in either the Company being a close company (within the
                  meaning of Chapter I of Part XI of ICTA 1988) or in a company
                  being a close company which has control (within the meaning of
                  Section 840 ICTA 1988) of the Company or in a company being a
                  close company and a member of a consortium (as defined in
                  Section 187(7) ICTA 1988) which owns the Company. In
                  determining whether a company is a close company for this
                  purpose, Section 414(1)(a) ICTA 1988 (exclusion of companies
                  not resident in the United Kingdom) and Section 415 of ICTA
                  1988 (exclusion of certain companies with listed shares) shall
                  be disregarded.

         (g)      Notwithstanding any provision of the Plan, no Option will be
                  granted to an employee or director under this Sub-Plan in
                  relation to which the exercise price is manifestly less than
                  the fair market value (as defined in Section 187(2) ICTA 1988)
                  of the Company's Common Stock on the date of grant of the
                  Option. The exercise price shall be stated at the date of
                  grant of the Option and determined in accordance with
                  Paragraph 5 of the Plan, save that the exercise price of an
                  Option granted under the Sub-Plan shall be not less than one
                  hundred percent (100%) of the fair market value of the stock
                  on the date of grant, and shall be agreed in advance with the
                  Shares Valuation Division of the Inland Revenue or otherwise
                  determined with the agreement of the Shares Valuation
                  Division.

         (h)      Notwithstanding Paragraph 7 of the Plan, settlement of the
                  exercise price may not be in the form of previously acquired
                  shares of Common Stock and payment of the amount due on
                  exercise may not be made in installments.

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         (i)      Any alteration or amendment to this Sub-Plan shall not have
                  effect unless approved by the Board of Inland Revenue. The
                  Company undertakes to provide details thereof to the Board of
                  Inland Revenue without delay for this purpose.

         (j)      Notwithstanding Paragraph 11 of the Plan, any material
                  alteration of the standard form of stock option agreement
                  shall not have effect unless approved by the Board of Inland
                  Revenue.

         (k)      No adjustment pursuant to Paragraph 12 of the Plan shall be
                  made to any Option which has been granted under the Sub-Plan
                  unless such adjustment would be permitted under the Plan and
                  is a variation in the share capital of which the scheme shares
                  form part under paragraph 29 Schedule 9 ICTA 1988. Where so
                  permitted, no such adjustment shall take effect until the
                  approval of the Board of Inland Revenue shall have been
                  obtained thereto.

         (l)      For the avoidance of doubt it is stated that the Company is
                  the grantor as defined in paragraph 1(1) Schedule 9 ICTA 1988.

         (m)      Any Option granted to an employee or director under this
                  Sub-Plan shall be limited to take effect so that immediately
                  following such grant, the aggregate market value (determined
                  at the time prescribed by paragraph 28 Schedule 9 ICTA 1988
                  and calculated in accordance with the provisions of the said
                  Schedule 9) of shares of Common Stock which the optionholder
                  can acquire under this Sub-Plan and any other scheme or
                  schemes, not being a savings-related share option scheme,
                  approved under the said Schedule 9 and established by the
                  grantor or by any associated company (as defined in Section
                  416 ICTA 1988) of the grantor (and not exercised), shall not
                  exceed(pound)30,000 or such other sum as may be prescribed
                  from time to time by paragraph 28 Schedule 9 ICTA 1988,
                  provided always that this limit shall not exceed the
                  limitations set out in the Plan.

         (n)      An Option will only be granted under this Sub-Plan to an
                  employee (other than one who is a director) or a full-time
                  director of the Company or a subsidiary participating in this
                  Sub-Plan. For this purpose, a full-time director is one who is
                  employed by the Company required to work at least 25 hours a
                  week excluding meal-times in the business of the Company or
                  its Subsidiaries. For the avoidance of doubt an Option will
                  not be granted under this Sub-Plan to a consultant or director
                  who is not an employee of the Company or any of its
                  Subsidiaries, and all references in the Plan to Options
                  granted to consultants shall be disregarded.

         (o)      The Company shall, not later than 30 days after the actual
                  receipt of the written notice of exercise of an Option given
                  in accordance with the provisions of the Plan, together with
                  the payment of the aggregate exercise price in respect of the
                  shares of Common

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                  Stock to be issued or transferred pursuant to the exercise of
                  an Option, allot and issue credited as fully paid or transfer
                  to the Optionee and cause to be registered in his name the
                  number of shares of Common Stock specified in the written
                  notice.

         (p)      The following shall not form part of and shall therefore be
                  disregarded for the purposes of the Sub-Plan:

                  (i)      in Paragraph 3 of the Plan, the words "the fair
                           market value of a share of Common Stock; whether and
                           under what conditions to restrict the sale or other
                           disposition of the shares of Common Stock acquired
                           upon the exercise of an Option and if so whether and
                           under what circumstances to waive such restriction;
                           whether to accelerate the date of exercise of any
                           option or installment; whether shares of Common Stock
                           may be issued upon the exercise of an option as
                           partly paid, and, if so, the dates when future
                           installments of the exercise price shall become due
                           and the amounts of such installment; and with the
                           consent of the optionee, to cancel or modify an
                           option, provided that the modified provision is
                           permitted to be included in an Option granted under
                           the terms of the Plan";

                  (ii)     in the first paragraph of Paragraph 7, the
                           parenthetical that reads, "or the amount due on
                           exercise if the applicable Contract permits
                           installment payments" and the language from "(b)" to
                           the end of that paragraph; and

                  (iii)    all references in the Plan to "Incentive Stock
                           Options" or "Non-Qualified Stock Options."

         (q)      This Sub-Plan shall not become effective in any manner until
                  and unless a closing occurs in connection with that certain
                  Share Purchase Agreement dated as of August 17, 1998, as
                  amended, by and among the Company, SolCom Systems Limited
                  ("SolCom") and certain shareholders and shareholders'
                  representatives of SolCom.


                                 ADOPTED ON BEHALF OF THE COMPANY:




                                 By: /s/  Stephen B. Gray
                                     ------------------------------------------
                                          Stephen B. Gray
                                          President and Chief Executive Officer



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