Document:

<PAGE>

                                                                  EXHHIBIT 10.11

                                 PHASECOM, INC.
                    REGISTRATION RIGHTS AND LOCK-UP AGREEMENT

         THIS REGISTRATION RIGHTS AND LOCK-UP AGREEMENT (this "Agreement") is
entered into as of April 21, 1996, by and among PHASECOM INVESTOR GROUP LIMITED
PARTNERSHIP, a Delaware limited partnership ("PhaseCom LP"), PHASECOM, INC., a
Delaware corporation ("PhaseCom Del"), GALRAN PROPERTIES (1993) LTD. ("Galran"),
EICHOT CAPITAL MARKETS AND INVESTMENTS (1993) LTD. ("Eichot"), TOM HOLDINGS AND
PROPERTIES (1993) LTD. ("Tom"), and Y. ATAI INVESTMENTS LTD. ("Atai"). Galran,
Eichot, Tom and Atai, may be referred to hereinafter individually as an
"Individual Holder" or collectively as "Individual Holders"; the Individual
Holders and the PhaseCom LP shall be collectively referred to as the "Initial
Holders".

                                    AGREEMENT

         NOW, THEREFORE, in consideration of the mutual agreements, covenants,
representations and warranties contained in this Agreement, the parties hereto
hereby agree as follows:

         1.       DEFINITIONS.

                  a.       "COMMISSION" means the United States Securities and
Exchange Commission or any other United States federal agency at the time
administering the Securities Act.

                  b.       "EXCHANGE ACT" means the Securities Exchange Act of
1934, as amended.

                  c.       "HOLDER" means any Person owning of record
Registrable Securities that have not been sold to the public pursuant to Rule
144 promulgated under the Securities Act or any assignee of record of such
Registrable Securities to whom rights under this Agreement have been duly
assigned in accordance with this Agreement.

                  d.       "INITIATING HOLDERS" means any holder or holders of
no less than thirty-five percent (35%) of the Registrable Securities.

                  e.       "OFFERING" means the closing of an underwritten
public offering pursuant to an effective registration statement under the
Securities Act covering the offering and sale of shares of Common Stock for the
account of PhaseCom Del (other than a registration statement effected solely to
implement an employee benefit plan, a transaction in which Rule 145 of the
Securities and Exchange Commission is applicable or any other form or type of
registration in which the shares of Common Stock issuable upon conversion of the
shares of Series A Preferred Stock cannot be included pursuant to Commission
rules of practices) resulting in aggregate proceeds to PhaseCom Del (before the
payment of underwriting

                                      -1-

<PAGE>

discounts and commission and the expense of the offering) in excess of U.S.
Twelve Million Dollars (U.S. $12,000,000).

                  f.       "PERSON" means any individual, corporation, trust,
partnership, association, or other entity.

                  g.       "REGISTRABLE SECURITIES" shall mean any shares of
Common Stock of PhaseCom Del owned by the Initial Holders or issued or issuable
upon exercise pursuant to options or warrants, or issued or issuable upon the
conversion of Series A Preferred Stock or any other security of PhaseCom Del
held by the Initial Holders.

                  h.       "SECURITIES ACT" means the Securities Act of 1933,
as amended, or any similar United States federal statute and the rules and
regulations of the Commission thereunder, all as the same shall be in effect
at the time.

         2.       REGISTRATION RIGHTS.

                  a.       DEMAND REGISTRATION. Upon the written request from
any Initiating Holders ("Requesting Initiating Holders") that PhaseCom Del
effect any registration with respect to all or any portion of the Registrable
Securities (other than a registration on Form S-3 or any related form of
Registration Statement), PhaseCom Del will:

                           (i)      give written notice of the proposed
registration to all other Holders no later than ten (10) business days after
receipt of such written request; and

                           (ii)     as soon as practicable, use its diligent
best efforts to effect such registration (including, without limitation, the
execution of an undertaking to file post-effective amendments, appropriate
qualifications under blue sky or other state securities laws and appropriate
compliance with applicable regulations issued under the Securities Act), as may
be so requested and as would permit or facilitate the sale and distribution of
all or such portion of such Registrable Securities as are specified in such
request, together with all or such portion of the Registrable Securities of any
Holder or Holders joining in such request as are specified in a written request
given within ten (10) days after receipt of such written notice from PhaseCom
Del; PROVIDED, HOWEVER, that PhaseCom Del shall not be obligated to take any
action to effect any such registration, qualification or compliance pursuant to
this Section 2.a:

                                    (1)      In any particular jurisdiction in
which PhaseCom Del would be required to execute a general consent to service of
process in effecting such registration, qualification or compliance unless
PhaseCom Del is already subject to service in such jurisdiction and except as
may be required by the Securities Act;

                                    (2)      Prior to the earlier of (1) May 1,
2000, or (2) eighteen (18) months after the effective date of PhaseCom Del's
first registered underwritten offering to the general public of its securities
for its own account;

                                    (3)      If the Initiating Holders propose
to sell a number of shares of Registrable Securities at an aggregate proposed
offering price (after deduction for under-

                                     -2-

<PAGE>

writer commissions and expenses) to the public of less than Seven Million,
Five Hundred Thousand Dollars ($7,500,000);

                                    (4)      After PhaseCom Del has effected two
(2) such registrations pursuant to this Section 2.a, and such registrations have
been declared or ordered effective; or

                                    (5)      If PhaseCom Del shall have received
an opinion of counsel to the effect that each such Requesting Initiating Holder
may sell up to seventy-five percent (75%) of the Registrable Securities then
held by each such Requesting Initiating Holder within the three (3) month period
immediately following such request without registration under the Securities
Act.

         Subject to the foregoing clauses 1) through 5), and to Section 2.a.v
(below), PhaseCom Del shall file a registration statement covering the
Registrable Securities so requested to be registered as soon as practicable
after receipt of the request from the Requesting Initiating Holders.

                           (iii)    UNDERWRITING. If the Requesting Initiating
Holders intend to distribute the Registrable Securities covered by their request
by means of an underwriting, they shall so advise PhaseCom Del as part of their
request made pursuant to Section 2.a and PhaseCom Del shall include such
information in the written notice referred to in Section 2.a.i. The right of any
Holder to registration pursuant to Section 2.a shall be conditioned upon such
Holder's participation in such underwriting and the inclusion of such
Registrable Securities in the underwriting to the extent requested (unless
otherwise mutually agreed by a majority in interest of the Requesting Initiating
Holders and such Holder to the extent provided herein).

                           (iv)     CUTBACKS/WITHDRAWALS. PhaseCom Del shall
(together with all Holders proposing to distribute their securities through such
underwriting) enter into an underwriting agreement in customary form with the
underwriter or underwriters selected for such underwriting by PhaseCom Del,
subject to the consent, which consent will not be unreasonably withheld, of a
majority in interest of the Registrable Securities held by those Holders
participating in such registration ("Participating Holders"). Notwithstanding
any other provision of this Section 2.a, if the underwriter(s) determine that
marketing factors require a limitation of the number of shares to be
underwritten and so advises the Requesting Initiating Holders in writing, then
the Requesting Initiating Holders shall so advise all Participating Holders, and
the number of shares of Registrable Securities that may be included in the
registration and underwriting shall be allocated among all such Participating
Holders in proportion, as nearly as practicable, to the respective amounts of
Registrable Securities held by such Participating Holders at the time of filing
the registration statement. No Registrable Securities excluded from the
underwriting by reason of the underwriter's marketing limitation shall be
included in such registration.

         If any Holder disapproves of the terms of the underwriting, such Holder
may elect to withdraw therefrom by written notice to PhaseCom Del, the
underwriter and the Requesting Initiating Holders. The Registrable Securities
and/or other securities so withdrawn from such underwriting shall also be
withdrawn from such registration; PROVIDED, HOWEVER,

                                     -3-

<PAGE>

that, if by the withdrawal of such Registrable Securities a greater number of
Registrable Securities held by other Holders may be included in such
registration (up to the maximum of any limitation imposed by the
underwriters), then PhaseCom Del shall offer to all Participating Holders the
right to include additional Registrable Securities in the same proportion
used in determining the underwriter limitation in this Section.

                           (v)      RIGHT TO DELAY A DEMAND REGISTRATION. If at
the time of any request to register Registrable Securities pursuant to this
Section, which is not summarily rejected because of Section 2.a.(ii)(1)-(5),
inclusive, PhaseCom Del is preparing a registration statement for a public
offering (other than a registration effected solely to implement an employee
benefit plan or a transaction to which Rule 145 of the Commission is applicable)
which in fact is filed and becomes effective within one hundred five (105) days
after the request, then PhaseCom Del may at its option direct that such request
be delayed for a period not in excess of one hundred thirty-five (135) days from
the effective date of such registration, such right to delay a request to be
exercised by PhaseCom Del not more than once in any twelve (12) month period.

                  b.       PIGGYBACK REGISTRATION.

                           (i)      PHASECOM DEL'S OBLIGATION TO REGISTER. If
PhaseCom Del at any time proposes to initiate a registration of its securities
under the Securities Act on its own or upon request of Holders other than
Initiating Holders and thereafter registers any of its securities under the
Securities Act (other than a registration effected solely to implement an
employee benefit plan, a transaction to which Rule 145 of the Commission is
applicable or any other form or type of registration in which Registrable
Securities cannot be included pursuant to Commission rule or practice), it will
give written notice to all Holders of the outstanding Registrable Securities of
its intention to do so at least twenty (20) days prior to the filing of any such
registration (stating the intended method and terms of disposition of such
securities, including a list of the jurisdictions in which PhaseCom Del intends
to qualify such securities). Upon the written request from any Holder within
fifteen (15) days after receipt of PhaseCom Del's notice to the Holders, subject
to the limits contained in this Section, PhaseCom shall afford each such Holder
an opportunity to include in such registration all or any part of the
Registrable Securities then held by such Holder, all to the extent requisite to
permit such sale or other disposition by such Holders of the Registrable
Securities so registered and to the extent permissible under applicable
securities laws; provided, however, that PhaseCom Del shall be required to use
such best efforts to register said Registrable Securities under this Section (b)
no more than two (2) times.

                           (ii)     CUTBACKS. Notwithstanding any other
provision of this Section, if the underwriter managing such registration
notifies the Holders in writing that market or economic conditions limit the
amount of securities which may reasonably be expected to be sold, the Holders of
such Registrable Securities will be allowed to register their Registrable
Securities pro rata based on the number of shares of Registrable Securities held
by such Holders, respectively. On the Offering, said underwriter may exclude all
Registrable Securities from PhaseCom Del's registration statement, but on all
subsequent registrations initiated by PhaseCom Del, such underwriter may not
limit the amount of the Registrable Securities to be registered to less than
twenty percent (20%) of the aggregate number of securities to be

                                     -4-

<PAGE>

registered so long as any other shares of PhaseCom Del are to be registered
as well. Likewise, PhaseCom Del shall require that the executive officers of
PhaseCom Del limit their registration of PhaseCom Del's securities in
substantially similar proportions in any registered public offering to which
this Section applies upon the recommendation of the managing underwriter
involved in such registration.

                  c.       FORM S-3.

                           (i)      OBLIGATION TO REGISTER. After the Offering,
PhaseCom Del shall use its best efforts to qualify for registration on Form S-3.
After PhaseCom Del has qualified for the use of Form S-3, the Holders of
Registrable Securities shall have the right to request registrations on Form S-3
thereafter, as the case may be (but not more than once in any eighteen (18)
month period and no more than two (2) times in the aggregate) under this Section
(such requests shall be in writing and shall state the number of shares of
Registrable Securities to be disposed of and the intended method of disposition
of such shares by such Holder or Holders), provided that PhaseCom Del shall not
be required to effect a registration pursuant to this Section unless (A) the
Holder or Holders requesting registration propose to dispose of shares of
Registrable Securities which they reasonably anticipate will have an aggregate
offering price (before deduction of underwriting discounts and expenses of sale)
of at least Seven Hundred Fifty Thousand Dollars ($750,000), or (B) PhaseCom Del
has initiated a proposed registration as described in Section 2.a.

                           (ii) NOTICE. PhaseCom Del shall give written notice
to all Holders of Registrable Securities of the receipt of a request for
registration pursuant to this Section 2.c and shall permit such other holders to
participate in the registration upon their request thereto given within fifteen
(15) days after receipt of such notice. Subject to the foregoing, PhaseCom Del
will use its best efforts to effect promptly the registration of all shares of
Registrable Securities on Form S-3, to the extent requested by the holders
thereof for purposes of disposition. PhaseCom Del need not register shares on
Form S-3 (or comparable form) in any state in which PhaseCom Del does not
qualify to do business. PhaseCom Del need not register shares on Form S-3 (or
comparable form) if PhaseCom Del is preparing a registration statement for a
public offering (other than a registration effected solely to implement an
employee benefit plan or a transaction to which Rule 145 of the Commission is
applicable) which, in fact, is filed and becomes effective within one hundred
twenty (120) days after the request, then PhaseCom Del may, at its option,
direct that such request be delayed for a period not in excess of one hundred
fifty (150) days from the effective date of such registration. Such right to
delay a request may not be exercised by PhaseCom Del more than once in any
twelve (12) month period.

                  d.       REGISTRATION PROCEDURES. If and whenever PhaseCom Del
is required by the provisions of this Section to use its best efforts to effect
the registration of any of its securities under the Securities Act, PhaseCom Del
will, as expeditiously as possible:

                           (i)      prepare and file with the Commission a
registration statement with respect to such securities and use its best efforts
to cause such registration statement to become and remain effective for the
period provided in this Section;

                                     -5-
<PAGE>

                           (ii)     prepare and file with the Commission such
amendments and supplements to such registration statement and the prospectus
used in connection therewith as may be necessary to keep such registration
statement effective and to comply with the provisions of the Securities Act with
respect to the sale or other disposition of all securities covered by such
registration statement whenever the seller or sellers of such securities shall
desire to sell or otherwise dispose of the same, but only to the extent provided
in this Section (the term "seller" or "sellers" as used herein refers to a
Holder or Holders of the Registrable Securities selling such shares);

                           (iii)    furnish to each seller such number of copies
of a prospectus, including a preliminary prospectus, in conformity with the
requirements of the Securities Act, and such other documents, as such seller may
reasonably request in order to facilitate the public sale or other disposition
of the securities owned by such seller; and,

                           (iv)     use every reasonable effort to register or
qualify the securities covered by such registration statement under such other
securities or state blue sky laws of such jurisdictions as each seller shall
reasonably request, and do any and all other acts and things which may be
necessary under such securities or blue sky laws to enable such seller to
consummate the public sale or other disposition in such jurisdictions of the
securities owned by such seller, except that PhaseCom Del shall not for any such
purpose be required to qualify to do business as a foreign corporation in any
jurisdiction wherein it is not so qualified or intends to be so qualified prior
to the effective date of the applicable registration statement.

                  e.       REGISTRATION EXPENSES. As used herein, "Registration
Expenses" shall mean all expenses incurred by PhaseCom Del in complying with
Sections 2.a, 2.b, 2.c and 2.d hereof, including, without limitation, all
registration and filing fees; printing expenses; fees and disbursements of
counsel for PhaseCom Del; fees and disbursements of one counsel for all the
selling shareholders of the Registrable Securities; blue sky fees and expenses;
and the expense of any special audits incident to or required by any such
registration (but excluding the compensation of regular employees of PhaseCom
Del which shall be paid in any event by PhaseCom Del); and "Selling Expenses"
shall mean all underwriting discounts and selling commissions applicable to the
sales thereunder. PhaseCom Del will pay all Registration Expenses in connection
with (A) only two (2) registrations pursuant to Section 2.b; and (B) only two
(2) registrations pursuant to Section 2.c; regardless of which Initiating
Holders have requested registration. All Selling Expenses in connection with
each registration pursuant to Sections 2.b and 2.c shall be borne by PhaseCom
Del and the selling Holders pro rata in proportion to the securities covered
thereby being sold by them. The selling Holders shall pay all Registration
Expenses and Selling Expenses in connection with each registration pursuant to
Section 2.a, PROVIDED, HOWEVER, that if at least two-thirds (2/3 or 66.66%) of
the Holders of Registrable Securities demand a registration pursuant to Section
2.a. above, then PhaseCom Del shall pay all Registration Expenses of one
registration pursuant to Section 2.a., and shall together with the selling
Holders bear Selling Expenses of such registration each in proportion to the
securities covered thereby and sold by them.

                  f.       INDEMNIFICATION.

                                     -6-

<PAGE>

                           (i)      INDEMNIFICATION BY PHASECOM DEL. In the
event of any registration of any Registrable Securities under the Securities Act
pursuant to this Section, PhaseCom Del shall indemnify and hold harmless each of
the following parties: (A) the Holder selling such securities; (B) each
underwriter (as defined in the Securities Act); (C) each other Holder who is an
officer, director or partner of such selling Holder or who participates in the
offering of such securities; and (D) each other Holder, if any, who controls
(within the meaning of the Securities Act) such selling Holder, underwriter or
Participating Holder against any losses, claims, damages or liabilities, as
incurred (collectively the "liability"), joint or several, to which such seller,
underwriter, Participating Holder or controlling Holder may become subject under
the Securities Act or any other statute or at common law, insofar as such
liability (or action in respect thereof) arises out of or is based upon (A) any
statement of any material fact contained in any registration statement under
which such securities were registered under the Securities Act, any preliminary
prospectus or final prospectus contained therein, or any amendment or supplement
thereto; (B) any alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein not misleading, or
(C) any violation by PhaseCom Del of the Securities Act or any rule or
regulation promulgated thereunder applicable to PhaseCom Del in connection with
any such registration, qualification or compliance, but only to the extent,
however, that such violation was not directly or indirectly, caused by any
Holder entitled to be indemnified hereunder. Except as otherwise provided in
subparagraph 2.f.iv (below), PhaseCom Del shall be obligated to reimburse each
such selling Holder, underwriter, Participating Holder or such controlling
Holder for any legal or other expenses in connection with investigating or
defending any such liability, as such expenses are incurred; PROVIDED, HOWEVER,
that PhaseCom Del shall not be liable to any selling Holder, underwriters,
Participating Holders, or controlling Holders in any such case to the extent
that any such liability arises out of or is based upon any statement or alleged
omission made in such registration statement, preliminary or final prospectus,
or amendment or supplement thereto in reliance upon and in conformity with
written information furnished to PhaseCom Del by such Holder to be specifically
stated for use therein; PhaseCom Del shall not be required to indemnify any
Holder against any liability arising from any untrue or misleading statement or
omission contained in any preliminary prospectus if such deficiency is corrected
in the final prospectus or for any liability which arises out of the failure of
any Holder to deliver a prospectus as required by the Securities Act. The
indemnity provided for in this Section shall remain in full force and effect
regardless of any investigation made by or on behalf of such selling Holder,
underwriter, Participating Holder or controlling Holder and shall survive
transfer of such securities by such selling Holder. In order to provide for just
and equitable contribution to joint liability under the Securities Act, in any
case in which either (W) any Holder exercising rights under this Agreement, or
any controlling person of any such Holder, makes a claim for indemnification
pursuant to this Section 2.f. but it is judicially determined (by the entry of a
final judgment or decree by a court of competent jurisdiction and the expiration
of time to appeal or the denial of the last right to appeal) that such
indemnification may not be enforced in such case notwithstanding the fact that
this Section 2.f. provides for indemnification in such case; or (X) contribution
under the Securities Act may be required on the part of any such selling Holder
or any such controlling person in circumstances for which indemnification is
provided under this Section 2.f; then, and in each such case, PhaseCom Del and
such Holder will contribute to the Holder seeking indemnification under this
Section 2.f.i the aggregate liability to which they may be subject (after
contribution from others) in such proportion so

                                     -7-

<PAGE>

that such Holder shall have paid the portion of the liability represented by
the percentage that the public offering price of its Registrable Securities
offered by and sold under the registration statement bears to the public
offering price of all securities offered by and sold under such registration
statement, and PhaseCom Del and other selling Holders are responsible for the
remaining portion, PROVIDED, HOWEVER, that, in any such case (Y) no such
Holder will be required to contribute any amount in excess of the public
offering price of all such Registrable Securities offered and sold by such
Holder pursuant to such registration statement; and (Z) no person or entity
guilty of fraudulent misrepresentation (within the meaning of Section 11(f)
of the Securities Act) will be entitled to contribution from any person or
entity who was not guilty of such fraudulent misrepresentations.

                           (ii)     INDEMNIFICATION BY HOLDERS OF REGISTRABLE
SECURITIES. Each Holder shall, by acceptance thereof, indemnify and hold
harmless each other Holder, its officers, directors or partners, PhaseCom Del,
its directors and officers, each underwriter and each other Holder, if any, who
controls PhaseCom Del or such underwriter, against any liability, joint or
several, as incurred, to which any such other holder, PhaseCom Del, underwriter
or any such director or officer of any such Holder may become subject under the
Securities Act or any other statute or at common law, in so far as such
liability (or actions in respect thereof) arises out of or is based upon (A) the
disposition by such Holder in violation of the provisions of this Section; (B)
any statement of any material fact contained in any registration statement under
which securities were registered under the Securities Act at the request of such
Holder, any preliminary prospectus or final prospectus contained therein, or any
amendment or supplement thereto; or (C) any alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading. Notwithstanding the above in this Section 2.f.ii, the
indemnification set forth in this Section 2.f.ii shall be given in the case of
clauses (B) and (C) to the extent, but only to the extent, that such statement
or alleged omission was made in such registration statement, preliminary or
final prospectus, amendment or supplement thereto in reliance upon and in
conformity with written information furnished to PhaseCom Del by such Holder and
expressly stated for use therein. Such Holder shall reimburse PhaseCom Del, such
underwriter or such director, officer, other Holder or for any legal fees
incurred in investigating or defending any such liability, as incurred;
PROVIDED, HOWEVER, that no Holder shall be required to indemnify any Holder
against any liability arising from any untrue or misleading statement or
omission contained in any preliminary prospectus if such deficiency is corrected
in the final prospectus or for any liability which arises out of the failure of
any Holder to deliver a prospectus as required by the Securities Act; and
provided further, that the obligations of such Holder for the indemnity
hereunder shall not extend to any settlement of claims related thereto without
the express written consent of such Holder.

                           (iii)    FURTHER INDEMNITY. Indemnification similar
to that specified in Sections 2.f.i and 2.f.ii shall be given by PhaseCom Del
and each Holder of any Registrable Securities (with such modifications as may be
appropriate) with respect to any required registration or other qualification of
the Common Stock or Series A Preferred Stock under any federal or state law or
regulation of governmental authority other than the Securities Act.

                           (iv)     PROCEDURES; RIGHTS TO SEPARATE COUNSEL. Each
party entitled to indemnification under this Section 2.f (the "Indemnified
Party") shall give notice to the party required to provide indemnification (the
"Indemnifying Party") promptly after such Indemnified

                                     -8-

<PAGE>

Party has received written notice of any claim as to which indemnity may be
sought, and shall permit the Indemnifying Party to assume the defense of any
such claim or any litigation resulting therefrom, unless there shall be a
conflict of interest, provided that counsel for the Indemnifying Party, who
shall conduct the defense of such claim or litigation, shall be approved by
the Indemnified Party (whose approval shall not unreasonably be withheld),
and the Indemnified Party may participate in such defense at such party's
expense, and provided further that the failure of any Indemnified Party to
give notice as provided herein shall not relieve the Indemnifying Party of
its obligations under this Section 2.f unless such failure to give notice
shall materially adversely affect the Indemnifying Party in the defense of
any such claim or any such litigation. The Indemnified Party shall also have
the right to employ separate counsel in any such action and to participate in
the defense thereof but the fees and expenses of such counsel shall not be at
the expense of the Indemnifying Party, unless the Indemnifying Party fails to
promptly defend, in which case the fees and expenses of such separate counsel
shall be borne by the Indemnifying Party. No Indemnifying Party, in the
defense of any such claim or litigation, shall, except with the consent of
each Indemnified Party, consent to entry of any judgment or enter into any
settlement which does not include as an unconditional term thereof the giving
by the claimant or plaintiff to such Indemnified Party a release from all
liability in respect to such claim or litigation.

                  g.       TERMINATION OF REGISTRATION RIGHTS. Notwithstanding
the foregoing provisions of this Section, the rights to registration and the
designation of Series A Preferred Stock as Registrable Securities shall
terminate as to any particular securities when such securities shall have been
lawfully sold by the Holder thereof to the public pursuant to a registration
statement.

                  h.       COMPLIANCE WITH RULE 144. If PhaseCom Del: (i)
registers a class of securities under Section 12 of the Exchange Act, or (ii)
shall commence to file reports under Section 13 or 15(d) of the Exchange Act,
thereafter, at the request of any Holder of the Registrable Securities who
proposes to sell the Registrable Securities in compliance with Rule 144 of the
Commission, PhaseCom Del shall forthwith furnish to such holder or holders a
written statement of compliance with the filing requirements of the Commission
as set forth in such Rule (at any time from and after ninety (90) days following
the effective date of the Offering), as such Rule may be amended from time to
time, and make available to the public and such Holders such information as will
enable the Holders to make sales of Registrable Securities pursuant to Rule 144.

                  i.       CONSENT TO BE BOUND. Each subsequent Holder must
consent in writing to be bound by the terms and conditions of this Section 2 in
order to acquire the rights granted pursuant to Section 2.

                  j.       ASSIGNABILITY OF REGISTRATION RIGHTS. Subject to
Section 2.i hereof, the registration rights set forth in this Section 2 are
assignable to each assignee of at least twenty thousand (20,000) shares of
Registrable Securities conveyed in accordance herewith (appropriately adjusted
for recapitalizations) who agrees in writing to be bound by the terms and
conditions of this Agreement within fifteen (15) days of such assignment.

                                     -9-

<PAGE>

                  k.       RIGHTS WHICH MAY NOT BE GRANTED TO SUBSEQUENT
INVESTORS. PhaseCom Del shall not grant registration rights or enter into any
registration rights agreement or similar agreement with any Person after the
date hereof which are superior to the rights granted hereunder, but may grant
such rights to such other Person which will be PARI PASSU with the Holders and
shall cause such Persons to be a Holder as if they had executed this Agreement
as of the date first written above.

                  l.       INFORMATION BY HOLDER. The Holder or Holders of
Registrable Securities included in any registration shall furnish to PhaseCom
Del such information regarding such Holder or Holders, the Registrable
Securities held by them, and the distribution proposed by such Holder or
Holders, as PhaseCom Del may reasonably request in writing and as shall be
required in connection with any registration, qualification or compliance
referred to in this Section.

                  m.       STANDOFF AGREEMENT.

                           (i)      In connection with the Offering, each of the
Holders agrees to have his, her or its PhaseCom Del share interests divided into
three (3) certificates, with PhaseCom Del rounding the shares covered by each
certificate to whole numbers in its sole discretion. One (1) certificate
representing twenty percent (20%) of the share interests of the Holder, shall
bear, in addition to any other applicable securities legends, a legend stating
that the shares represented by that certificate may not be transferred by any
means whatsoever, without the agreement of PhaseCom Del for a period commencing
as of the commencement of the Offering and ending on the one hundred eightieth
(180th) day following the commencement of the Offering. A second certificate
representing forty percent (40%) of the share interests of the Holder, shall
bear, in addition to any other applicable securities legends, a legend stating
that the shares represented by that certificate may not be transferred by any
means whatsoever, without the agreement of PhaseCom Del, for a period commencing
as of the commencement of the Offering and ending the two hundred seventieth
(270th) day following commencement of the Offering. A third certificate
representing forty percent (40%) of the share interests of the Holder, shall
bear, in addition to any other applicable securities legends, a legend stating
that the shares represented by that certificate may not transferred by any means
whatsoever, without the agreement of PhaseCom Del, for a period commencing as of
the commencement of the Offering and ending the three hundred ninety-fifth
(395th) day following the commencement of the Offering. Each Holder agrees to be
bound by the legend restrictions set forth above.

                           (ii)     Until the applicable lock-up period expires,
the standoff holder agrees unless released in writing by PhaseCom Del and the
underwriters managing the Offering, not to sell, make any short sale of, loan,
grant any option for the purchase of, or otherwise dispose of any Registrable
Securities (other than those included in the Offering). PhaseCom Del as
applicable, may impose stop transfer instructions with respect to the shares
subject to the foregoing restrictions, until the end of the applicable lock-up
period.

                           (iii)    Notwithstanding anything in the foregoing to
the contrary, should PhaseCom Del's Common Stock, at anytime after one hundred
eighty (180) days after effectiveness of the Offering be listed on NASDAQ at the
close of trading for three (3) consecutive

                                     -10-

<PAGE>

business days (the last such date in the first three (3) such consecutive
days to occur being the "Double Price Date") at a price more than twice the
price of such shares in the Offering, then the lock-up restrictions set forth
above shall be released by PhaseCom Del, except for the fifteen (15) business
days after the first Double Price Date during which the lead underwriter in
the Offering shall be given the opportunity to arrange a block trade ("Block
Trade") of PhaseCom Del Common Stock. The Holders shall not be obligated to
participate in the Block Trade. During that fifteen (15) business day period,
no sales, transfers, or exchanges of any Registrable Securities that would
otherwise still be subject to a lock-up restriction except for this Section
2.m.iii, can be made by a Holder except through the Block Trade.

         3.       MISCELLANEOUS.

                  a.       CONSENT TO AMENDMENTS. Except as otherwise expressly
provided herein, the provisions of this Agreement may be amended and PhaseCom
Del may take any action herein prohibited, or omit to perform any act herein
required to be performed by them, only if it has obtained the written consent of
Holders holding a majority of the then Registrable Securities. No course of
dealing between PhaseCom Del and any Holder, or any delay in exercising any
rights hereunder will operate as a waiver of any rights of any such Holders.

                  b.       SUCCESSORS AND ASSIGNS. Except as otherwise expressly
provided herein, all covenants and agreements contained in this Agreement by or
on behalf of any of the parties hereto shall bind and inure to the benefit of
the respective successors and assigns of the parties hereto whether so expressed
or not.

                  c.       SEVERABILITY. Each provision of this Agreement shall
be interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Agreement is held to be prohibited by or invalid
under applicable law, such provision shall be ineffective only to the extent of
such prohibition or invalidity, without invalidating the remainder of this
Agreement.

                  d.       COUNTERPARTS. This Agreement may be executed in two
or more counterparts, any one of which need not contain the signatures of more
than one party, but all such counterparts when taken together shall constitute
one and the same Agreement.

                  e.       DESCRIPTIVE HEADINGS. The descriptive headings of
this Agreement are inserted for convenience only and do not constitute a part of
this Agreement.

                  f.       NOTICES. All notices, demands, consents or other
communications required or permitted to be given hereunder shall be in writing
and shall be given by letter personally delivered by hand or by Express Mail,
Federal Express or similar service, or sent by first class, prepaid, certified
mail, return receipt requested (express airmail if overseas), or by facsimile,
addressed as follows:

         IF TO HOLDERS:             To the Addresses and/or facsimile  numbers
                                    as contained on PhaseCom Del's Shareholders
                                    List.

                                     -11-

<PAGE>

         IF TO PHASECOM LP:         PHASECOM INVESTOR GROUP LIMITED PARTNERSHIP
                                    100 Why Worry Lane
                                    Woodside, CA  94062
                                    Facsimile No. (415) 851-9036

         IF TO PHASECOM DEL:        PHASECOM, INC.
                                    20300 Stevens Creek Blvd, 4th Floor
                                    Cupertino, CA  95014
                                    Facsimile No. (408) 777-2760

         WITH A COPY TO:            Stephen P. Pezzola, Esq.
                                    PEZZOLA & REINKE, APC
                                    1999 Harrison, Suite 1300
                                    Oakland, CA  94612  USA
                                    Facsimile No. (510) 834-7440

and any such notices, demands, consents or other communications as
above-mentioned shall be deemed to have been received:

                           (i)      in the case of personal delivery by hand or
                                    by Express Mail, Federal Express or similar
                                    service, when delivered; or,

                           (ii)     in the case of having been sent by first
                                    class, prepaid, certified mail, return
                                    receipt requested, on the third business day
                                    following the day of posting, or (if sent
                                    express airmail from overseas on the
                                    fifteenth business day following the day of
                                    posting); or,

                           (iii)    in the case of having been sent by
                                    facsimile, on confirmation registered by the
                                    sender's facsimile that such facsimile was
                                    received by such sender where such
                                    confirmation occurs before 1700 hours local
                                    time of the addressee on the day of
                                    confirmation and, in any other case, on the
                                    day following the day of confirmation.

                  Any notice, demand, consent or other communication not
received on a business day or received after 1700 hours local time of the
addressee on any business day in the place of receipt shall be deemed to have
been received on the next following business day.

                  The term "business day" as contained in this subsection,
shall, for the purpose of this subsection, mean any day of the week other than a
Saturday, Sunday, Public Holiday, Jewish Holy Day, and any other day on which
commercial banks are not open for the conduct of business in the place of
receipt.

                  g.       GOVERNING LAW. The validity, meaning and effect of
this Agreement shall be determined in accordance with the laws of California,
applicable to contracts made and to be performed entirely within the State of
California.

                                     -12-

<PAGE>

                  h.       LITIGATION COSTS. If any legal action or other
proceeding is brought for the enforcement of this Agreement, or because of a
dispute, breach, default, or misrepresentation in connection with any of the
provisions of this Agreement, the successful or prevailing party or parties
shall be entitled to recover reasonable attorneys' fees and other costs incurred
in that action or proceeding, in addition to any other relief to which it or
they may be entitled.

                  i.       SPECIFIC PERFORMANCE. Each party's obligation under
this Agreement is unique. If any party should default in its obligations under
this Agreement, the parties each acknowledge that it would be extremely
impracticable to measure the resulting damages; accordingly, the nondefaulting
party, in addition to any other available rights or remedies, may sue in equity
for specific performance and the parties each expressly waive the defense that a
remedy in damages will be adequate.

                  j.       FINAL AGREEMENT. This Agreement constitutes the
entire agreement between the parties pertaining to registration rights and
lock-up provisions and supersedes and terminates all prior and contemporaneous
agreements, understandings, negotiations and discussions, whether oral or
written, specifically including the Exchange Agreement on even date herewith, on
the issues of registration rights and lock-up provisions. There are no
warranties, representations or other agreements between the parties in
connection with registration rights and lock-up provisions except as
specifically set forth herein.

                  k.       VENUE. Any action or proceeding arising directly or
indirectly from this Agreement shall be litigated in an appropriate state or
federal court in the County of Santa Clara, State of California.

                  l.       WAIVER OF CONFLICT. PHASECOM LP ACKNOWLEDGES THAT THE
LAW FIRM OF PEZZOLA & REINKE, A PROFESSIONAL CORPORATION ("P&R"), WHICH ALSO
GENERALLY REPRESENTS PHASECOM, LP, REPRESENTED PHASECOM DEL IN THE PREPARATION
OF THIS DOCUMENT. PHASECOM LP HEREBY ACKNOWLEDGES THAT P&R, DID NOT ADVISE
PHASECOM LP AS TO THIS AGREEMENT, AND ADVISED PHASECOM LP TO SEEK THE ADVICE OF
OTHER COUNSEL. PHASECOM LP ACKNOWLEDGES THAT IT HAD THE OPPORTUNITY TO CONSULT
WITH AN ATTORNEY WITH RESPECT TO THIS DOCUMENT. PHASECOM LP HEREBY ACKNOWLEDGES,
AND HEREBY WAIVES, ANY CONFLICT THAT MAY EXIST IN CONNECTION WITH THE
PREPARATION OF THIS DOCUMENT AND REPRESENTATION OF PHASECOM DEL BY P&R.

                  (REMAINDER OF PAGE INTENTIONALLY LEFT BLANK.)

                                     -13-

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.

PHASECOM INVESTOR GROUP LIMITED PARTNERSHIP,
a Delaware limited partnership
100 Why Worry Lane
Woodside, CA  94062

By: /s/ Davidi Gilo
   -----------------------------------------------
   Davidi Gilo, President
   of Harmony Management, Inc.,
   General Partner

PHASECOM, INC.
a Delaware corporation
20300 Stevens Creek Blvd,
4th Floor
Cupertino, CA 95014

By: /s/ Davidi Gilo
   -----------------------------------------------
     Davidi Gilo, Chairman of the Board

GALRAN PROPERTIES (1993) LTD.

/s/ Boaz Adini
--------------------------------------------------

BOAZ ADINI
--------------------------------------------------
         (print name)

                                     -14-

<PAGE>

EICHOT CAPITAL MARKETS AND INVESTMENTS (1993) LTD.

/s/ Boaz Adini
--------------------------------------------------

BOAZ ADINI
--------------------------------------------------
         (print name)

TOM HOLDINGS AND PROPERTIES (1993) LTD.

/s/ Boaz Adini
--------------------------------------------------

BOAZ ADINI
--------------------------------------------------
         (print name)

Y. ATAI INVESTMENTS LTD.

/s/ Yehuda Atai
--------------------------------------------------

YEHUDA ATAI
--------------------------------------------------
         (print name)

                                     -15-<PAGE>

                                                                   EXHIBIT 10.12

                                 PHASECOM, INC.
                        AMENDMENT TO REGISTRATION RIGHTS
                              AND LOCK-UP AGREEMENT

         THIS AMENDMENT TO REGISTRATION RIGHTS AND LOCK-UP AGREEMENT made as of
this 13th day of August, 1999 by and among PHASECOM INVESTOR GROUP LIMITED
PARTNERSHIP, a Delaware limited partnership ("PhaseCom LP"), PHASECOM, INC., a
Delaware Corporation ("PhaseCom Del."), GALRAN PROPERTIES (1993) LTD.
("Galran"), EICHOT CAPITAL MARKETS AND INVESTMENTS (1993) LTD. ("Eichot"), TOM
HOLDINGS AND PROPERTIES (1993) LTD. ("Tom"), Y. ATAI INVESTMENTS LTD. ("Atai"),
ADC TELECOMMUNICATIONS, INC., a Minnesota Corporation ("ADC") and the additional
holders of PhaseCom Del's Series A Convertible Preferred Stock identified on the
signature page to this Agreement (collectively, the "Additional Series A
Stockholders").

                               W I T N E S S E T H :

         WHEREAS, PhaseCom LP, PhaseCom Del., Galran, Eichot, Tom and Atai are
parties to that Registration Rights and Lock-Up Agreement dated as of April 21,
1996 (the "Registration Rights Agreement"); and

         WHEREAS, in connection with the acquisition of shares in PhaseCom Del
by ADC, the parties hereto desire to amend the Registration Rights Agreement as
set forth herein and to add ADC and the Additional Series A Stockholders as a
party thereto.

         NOW, THEREFORE, for and in consideration of the mutual agreements,
covenants, representations and warranties contained in this Agreement, the
parties hereto agree as follows:

         1.        DEFINITIONS. Except as otherwise expressly provided herein,
the definitions set forth in Article 1 of the Registration Rights Agreement
shall have the same meaning in this Agreement as if fully set forth herein.

         2.        ADDITIONAL PARTIES TO AGREEMENT. Effective upon the Closing
(as defined in the Series C Preferred Stock Purchase Agreement, dated as of even
date herewith, by and between PhaseCom Del and ADC), ADC and each Additional
Series A Stockholder shall be deemed a "Holder" and an "Initial Holder" for all
purposes under the Registration Rights Agreement, as amended by this Amendment
and shall, for all purposes under said Registration Rights Agreement be deemed a
party thereto.

         3.        AMENDMENT TO ARTICLE 2, M.Sections 2 m (i), 2 m (ii) and 2 m
(iii) of the Registration Rights Agreement, entitled "Standoff Agreement," shall
be deleted and in their place, the following new Articles 2 m (i) and 2 m (ii),
shall be inserted:

<PAGE>

                   m.   (i)   In connection with the Offering, each of the
Holders agrees to have placed on his, her or its certificate(s) representing
his, her or its PhaseCom Del share interests, in addition to any other
applicable securities legends, a legend stating that the shares represented by
that certificate may not be transferred by any means whatsoever, without the
agreement of PhaseCom Del for a period commencing as of the commencement of the
Offering and ending on the one hundred eightieth (180th) day following the
commencement of the Offering. Each Holder agrees to be bound by the legend
restrictions set forth above.

                        (ii)   Until the lock-up period expires, the
standoff holder agrees unless released in writing by PhaseCom Del and the
underwriters managing the Offering, not to sell, make any short sale of, loan,
grant any option for the purchase of, or otherwise dispose of any Registrable
Securities (other than those included in the Offering). PhaseCom Del, as
applicable, may impose stop transfer instructions with respect to the shares
subject to the foregoing restrictions, until the end of the lock-up period.

         4.        FULL FORCE AND EFFECT. The parties hereto hereby modify and
amend the Registration Rights Agreement in accordance with the provisions of
this Amendment and except as hereby and herein modified and amended, the
Registration Rights Agreement shall remain in full force and effect and binding
upon the parties.

         IN WITNESS WHEREOF, the parties have duly executed and delivered this
Agreement as of the date first above written.

PHASECOM INVESTOR GROUP
LIMITED PARTNERSHIP

By:      /s/ Davidi Gilo
         -----------------------------------------
         Davidi Gilo, President
         Harmony Management, Inc., General Partner

PHASECOM, INC.
a Delaware Corporation
20400 Stevens Creek Blvd.
8th Floor
Cupertino, CA 95014

By:       /s/ Davidi Gilo
         -----------------------------------------
         Davidi Gilo, Chief Executive Officer

GALRAN PROPERTIES (1993) LTD.

/s/ Boaz Adini
--------------------------------------------------

<PAGE>

BOAZ ADINI
--------------------------------------------------
         (print name)

EICHOT CAPITAL MARKETS AND
INVESTMENTS (1993) LTD.

/s/ Zvi Biran   and   /s/ Boaz Adini
--------------------------------------------------

 ZVI BIRAN and BOAZ ADINI
--------------------------------------------------
(print name)

TOM HOLDINGS AND PROPERTIES (1993) LTD.

/s/ Zvi Biran
--------------------------------------------------

ZVI BIRAN
--------------------------------------------------
(print name)

Y. ATAI INVESTMENTS (1993) LTD.

/s/ Yehuda Atai
--------------------------------------------------

YEHUDA ATAI
--------------------------------------------------
(print name)

ADC TELECOMMUNICATIONS, INC.
a Minnesota Corporation
P.O. Box 1101
Minneapolis, MINN 55440

By: /s/ Jeffrey D. Pflaum
   -----------------------------------------------

JEFFREY D. PFLAUM, VICE-PRESIDENT
--------------------------------------------------
         (print name & title)

PHASECOM INVESTOR GROUP
LIMITED PARTNERSHIP NO. 2

By: /s/ Davidi Gilo
--------------------------------------------------
        Davidi Gilo, President
        Harmony Management, Inc., General Partner

DAVIDI and SHAMAYA GILO TRUST U/T/D

<PAGE>

1/18/91

By: /s/ Davidi Gilo
   -----------------------------------------------
        Davidi Gilo, Trustee

PEZZOLA-FOSTER TRUST U/T/D
4/3/87

By: /s/ Stephen Pezzola
   -----------------------------------------------
        Stephen P. Pezzola, Trustee

JOSEPH GORODNICK

/s/ Joseph Gorodnick
--------------------------------------------------

ITHZAK and ESTHER HOFFI

/s/ Ithzak Hoffi
--------------------------------------------------

/s/ Esther Hoffi
--------------------------------------------------

CHIM-NIR LTD

By: /s/ Arie Etzioni and /s/ Ilan Sela
   -----------------------------------------------

ARIE ETZIONI and ILAN SELA
--------------------------------------------------
         (print name & title)

HAREL-INSURANCE INVESTMENTS LTD.

By: /s/ Moti Rosen and /s/ Y. Rothschild
   -----------------------------------------------

MOTI ROSEN and Y. ROTHSCHILD
--------------------------------------------------
         (print name & title)

AL-BEN LTD.

By: /s/ Josepf L. Paluch
   -----------------------------------------------

JOSEPF L. PALUCH, General Manager
--------------------------------------------------
         (print name & title)

<PAGE>

ILAN SELAH

/s/ Ilan Selah
--------------------------------------------------

ARYEH and YUVAL EZYONI

/s/ Aryeh Ezyoni
--------------------------------------------------

/s/ Yuval Ezyoni
--------------------------------------------------

MORDECHAI GAZIT

/s/ Mordechai Gazit
--------------------------------------------------

SHAUL BERGER

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

REUVEN and NAOMI ASHKENAZY

/s/ Reuven Ashkenaz
--------------------------------------------------

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

AVRAHAM FISCHER

/s/ Avraham Fischer
--------------------------------------------------

MIRI LENT

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

I. FISCHER & CO as Trustee U/A dtd 11/10/97
FBO: The parties identified on Schedule A hereto

By: /s/ I. Fischer & Co. Trustees Ltd.

--------------------------------------------------
         (print name & title)

VICTOR HALPERT

<PAGE>

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

YOTAM FINANCING TECHNOLOGICAL
VENTURES LTD.

By: /s/ Arie Hinkis
--------------------------------------------------

ARIE HINKIS, CEO
--------------------------------------------------
         (print name & title)

SCHLOMO RACHIV

--------------------------------------------------
         (signature)

<PAGE>

                                   SCHEDULE A

I. Fischer & Co. as Trsutee U/A dtd 11/10/97

<TABLE>
<S>  <C>
FBO: Y. Atai Investments Ltd.
FBO: Galran Properties (1993) Ltd.
FBO: Tom Holdings and Properties (1993) Ltd.
FBO: Eichut Capital Markets and Investments (1993) Ltd.
FBO: Arie Zimmerman
FBO: Itzhak and Esther Hoffi
FBO: Chim-Nir Ltd.
FBO: MMD Technology Israel Ltd.
FBO: Reger Investment Company Ltd.
FBO: Cham Foods (Israel) Ltd.
FBO: Harel Hamishmar Investments Ltd.
FBO: Reuven and Naomi Ashkenazy
FBO: Al-Ben Ltd.
FBO: Miri Lent
FBO: Ilan Selan
FBO: Yotam Financing and Technology Ventures Ltd.
FBO: Hananyah and Tamar Amishav
FBO: Phelix Lachman
FBO: Mordechai Gazit
FBO: Michael Barzily, or Successor, as Trustee on behalf of Meir Leiberman
FBO: Michael Barzily, or Successor, as Trustee on behalf of Dudi Gidron
FBO: Michael Barzily, or Successor, as Trustee on behalf of Menashe Shachar
</TABLE>

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00004-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00004-of-00352.parquet"}]]