Document:

JOINDER AGREEMENT

      This Joinder Agreement, dated as of December 16, 2003 (the "Agreement"),
is entered into by and among P-Com, Inc., a Delaware corporation (the
"Company"), and each of the additional purchasers (individually, an "Additional
Purchaser" and collectively, the "Additional Purchasers") set forth on the
execution pages hereof (each, an "Execution Page" and collectively, the
"Execution Pages").

      A. On October 3, 2003 (the "Initial Closing Date"), the Company and each
of the initial purchasers (the "Initial Purchasers") consummated the purchase
and sale of 8352.58 Units (the "Initial Closing"), pursuant to that certain
Securities Purchase Agreement, dated as of October 3, 2003 (the "Purchase
Agreement"), by and among the Company and the Initial Purchasers. Capitalized
terms used but not defined herein shall have the same meanings given to such
terms in the Purchase Agreement.

      B. The Company and the Additional Purchasers desire to consummate the
purchase and sale of an aggregate of up to 1647.42 Units at a second closing
(the "Second Closing"), pursuant to the terms and conditions contained in the
Purchase Agreement, to occur on the date hereof (the "Second Closing Date").

      NOW, THEREFORE, the parties hereto, intending to be legally bound hereby,
agree as follows:

      1. Purchase and Sale of Securities. At the Second Closing, the Company
shall issue and sell to each Additional Purchaser, and each Additional
Purchaser, severally and not jointly, shall purchase from the Company, such
number of Units as is set forth on such Additional Purchaser's Execution Page,
for a purchase price per Unit equal to One Thousand Seven Hundred Fifty Dollars
($1,750).

      2. Purchase Agreement. Each Additional Purchaser shall be deemed a
Purchaser (as defined in the Purchase Agreement) and made a party to, and bound
by, the Purchase Agreement, which is incorporated herein by this reference and a
copy of which is attached hereto as Exhibit A. As of the Second Closing Date,
each Additional Purchaser hereby makes all of the representations and warranties
contained in Section 2 of the Purchase Agreement.

      3. Registration Rights Agreement. Each Additional Purchaser shall be
deemed an Initial Investor (as defined in the Registration Rights Agreement) and
made a party to, and bound by, the Registration Rights Agreement, which is
incorporated herein by this reference and a copy of which is attached hereto as
Exhibit B.

      4. Rights of Additional Purchasers. The Second Closing shall be deemed to
have occurred in accordance with Section 1(b) of the Purchase Agreement. Each
Additional Purchaser and the Securities purchased at the Second Closing shall
have the same rights and be subject to the same obligations set forth in the
Purchase Agreement and the Registration Rights Agreement as the Initial
Purchasers and the Securities purchased at the Initial Closing.

                  [REMAINDER OF PAGE LEFT BLANK INTENTIONALLY]

<PAGE>

      IN WITNESS WHEREOF, the undersigned Additional Purchaser and the Company
have caused this Agreement to be duly executed as of the date first above
written.

P-COM, INC.

By: /s/ Sam Smookler
   --------------------------------
   Name: Sam Smookler
   Title: President and CEO

ADDITIONAL PURCHASER:

(Print or Type Name of Purchaser)

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

RESIDENCE:

ADDRESS:

   Telephone:
   Facsimile:
   Attention:

AGGREGATE SUBSCRIPTION AMOUNT:

Number of Units:
Purchase Price ($1,750.00 per Unit):

                      [SIGNATURE PAGE TO JOINDER AGREEMENT]

<PAGE>

                                    EXHIBIT A

                               Purchase Agreement

<PAGE>

                                    EXHIBIT B

                          Registration Rights AgreementCLOSING MEMORANDUM

      This Closing Memorandum is made this 10th day of December 2003 (this
"Memorandum") by and between P-Com, Inc., a Delaware corporation ("Purchaser"),
and SPEEDCOM Wireless Corporation, a Delaware corporation ("Seller").

      Purchaser and Seller are parties to that certain Asset Purchase Agreement,
dated as of June 16, 2003, as amended dated September 2, 2003 (the "Purchase
Agreement"), pursuant to which Seller has agreed to sell and Purchaser has
agreed to purchase substantially all of the assets of Seller. Capitalized terms
used but not defined herein shall have the same meanings given to such terms in
the Purchase Agreement.

      Due to certain changes in the business, financial and other circumstances
of Seller and Purchaser that have occurred since the execution of the Purchase
Agreement, Purchaser and Seller desire to consummate the transactions
contemplated by the Purchase Agreement, subject to certain amendments and
modifications to their respective rights and obligations thereunder, as
memorialized herein.

      Purchaser and Seller have agreed to proceed with the Closing in accordance
with the following terms and conditions:

      1. Purchased Assets.

            1.1 Schedule 1.1(c). The total amount of cash of Seller at Closing,
including other Schedule 1.1 (c) assets, is deficient by approximately $57,000,
which amount shall result in a decrease to the Purchase Price, as set forth in
Section 3 below ("Purchase Price Adjustment").

            1.2 Schedule 1.1(f). The total amount of accounts receivable of
Seller at Closing is deficient by approximately $266,000, which amount shall
result in a Purchase Price Adjustment.

            1.3 Schedule 1.1(g). All documents referred to in Schedule 1.1(g)
shall be maintained by Seller at Purchaser's Sarasota, Florida facility (which
facility shall be subleased to Purchaser, as set forth in Section 2.1(g) below).
Both parties shall have access to all such documents. Post-Closing, Purchaser
shall have the right to make duplicates of any and all such documents. Neither
party shall destroy any of such documents for a period of five (5) years from
the Closing Date.

            1.4 Bank Accounts. At Closing, Seller shall have opened a new bank
account for purposes of conducting business after the Closing Date. Seller shall
promptly forward to Purchaser all payments on accounts receivable, and all
deposits or other monies on deposit in the name of Seller, its subsidiaries or
otherwise, which payments, deposits or monies are or should be on account of
Purchaser under the terms of the Purchase Agreement.

      2. Assumed Liabilities.

            2.1 Schedule 2.1.

                                      -1-
<PAGE>

            (a) The list of accounts payable constituting Assumed Liabilities on
the Closing Date is set forth on Exhibit A attached hereto. Purchaser shall not
be obligated to assume any accounts payable of Seller not specifically set forth
on Exhibit A attached hereto. Those accounts payable of Seller not specifically
set forth on Exhibit A shall constitute Excluded Liabilities. In consideration
for the reduction in the amount of Assumed Liabilities constituting accounts
payable, Purchaser shall pay Seller $75,000 on or before December 31, 2003.

            (b) As a result of certain obligations and potential liabilities
assumed by Purchaser at Closing set forth on Exhibit B attached hereto, which
obligations and potential liabilities are for the account of Seller under the
terms of the Purchase Agreement, a Purchase Price Adjustment shall be made in
the amount of $259,000.

            (c) All severance and other obligations to Bill Davis have been paid
by Seller.

            (d) The total amount due Purchaser on the Closing Date, represented
by promissory notes held by Purchaser, is $1.58 million ("Notes"). A dispute
exists as to whether such Notes may be converted into restricted Common Stock of
Seller prior to Closing. In consideration for the resolution of such dispute,
the parties have agreed that Purchaser may convert $400,000 of such amount into
shares of restricted common stock of Seller, which for purposes of this Section
2.1(d), shall have a value of $.12 per share ("SPEEDCOM Shares"). All remaining
obligations of Seller to Purchaser represented by Notes shall be considered an
Assumed Liability. Upon delivery to Seller of Notes totaling $400,000, Seller
shall promptly take such actions as is necessary to issue the SPEEDCOM Shares to
Purchaser. For purposes of this Section 2.1(d), the election by Purchaser to
accept the SPEEDCOM Shares in consideration for the termination of $1,180,000 of
Notes as set forth herein shall be deemed to occur just prior to Closing.
Purchaser expressly waives any right to receive Purchased Shares, as defined in
Section 3 below, in connection with any distribution of such Purchased Shares as
a dividend to shareholders of Seller.

            (e) In lieu of assuming, at the Closing, $3,000,000 in promissory
notes previously issued by Seller (the "Seller Notes"), as required by Section
2.1 and Schedule 2.1 of the Purchase Agreement, Purchaser shall issue a new
promissory note to the holder of the Seller Notes in the original principal
amount of $3,000,000, with a maturity of 36 months and a rate of interest equal
to 7% per annum, convertible into Common Stock of Purchaser at $.20 per share
(the "Purchaser Note"). Upon Purchaser's issuance of the Purchaser Note,
Purchaser's obligation to assume the Seller Notes shall be deemed fully
satisfied. As a condition to the delivery of the Purchaser Note to the holder of
the Seller Notes, Purchaser shall require that such holder credit an amount
equal to $3,000,000 against the amounts owed by Seller under the Seller Notes.

            (f) Purchaser has been made aware of the pending litigation
involving XeTel Corporation. Purchaser shall not assume any obligation for the
XeTel or any other litigation. Seller represents and warrants that no other
litigation is pending involving Seller or, to Seller's knowledge, is
contemplated.

                                      -2-
<PAGE>

            (g) Purchaser shall assume the lease agreements with respect to
Seller's production facility at 8105 25th Court East, Sarasota, Florida, its
corporate office at 7020 Professional Parkway East, Sarasota, Florida, and its
offices in Shanghai, China and Singapore (the "Facilities"). Purchaser shall
enter into sub-lease agreements with Seller to occupy Seller's Facilities,
promptly following Closing. The parties shall use their best efforts to obtain
the consent from the landlords to the assignment of the obligations of Seller
under such Facilities leases, so as to relieve Seller of all obligations under
the terms of such leases.

            (h) Purchaser shall not assume any obligation of Seller for payment
of accrued dividends under outstanding preferred stock of Seller, or any other
obligation or liability of Seller not specifically referenced herein or in the
Purchase Agreement.

      3. Purchase Price Adjustment. As a result of each Purchase Price
Adjustment, the Purchase Price payable to Seller shall be reduced by 4,000,000
shares of Common Stock of Purchaser, so that the number of shares of Seller
Common Stock issuable at Closing shall equal 63,500,000 shares ("Purchased
Shares"). Promptly following Closing, but no later than ten (5) business days
following Closing, Purchaser shall deliver to Seller the Purchased Shares.

      4. Effect. Except as and to the extent amended or modified by this
Memorandum, the Purchase Agreement shall remain in full force and effect in
accordance with its terms.

      5. Representation by Counsel. Both parties have thoroughly reviewed the
Purchase Agreement, this Memorandum, and the documents to be delivered at
Closing, and have had an opportunity to independently consult with counsel, and
have done so.

      6. Miscellaneous.

            6.1 Binding Effect. This Memorandum shall constitute a binding and
enforceable agreement of the parties.

            6.2 Entire Agreement. This Memorandum supersedes all prior
discussions and agreements between the parties with respect to the subject
matter hereof and contains the sole and entire agreement of the parties hereto
with respect to the subject matter hereof.

            6.3 Waiver. Any term or condition of this Memorandum may be waived
at any time by the party that is entitled to the benefit thereof, but no such
waiver shall be effective unless set forth in a written instrument duly executed
by or on behalf of the party waiving such term or condition. No waiver by any
party of any term or condition of this Memorandum, in any one or more instances,
shall be deemed to be or construed as a waiver of the same or any other term or
condition of this Memorandum on any future occasion.

            6.4 Amendment. This Memorandum may be amended, supplemented or
modified only by a written instrument duly executed by or on behalf of each
party hereto.

            6.5 Expenses. Each party hereto shall pay its own costs and
expenses, including without limitation legal fees, incurred in connection with
the negotiation and execution of this Memorandum.

                                      -3-
<PAGE>

            6.6 Attorneys' Fees. If any legal action or other proceeding is
brought for the enforcement of this Memorandum, or because of an alleged
dispute, breach, default or misrepresentation in connection with any of the
provisions of this Memorandum, the successful or prevailing party 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 may be
entitled.

            6.7 Mutual Drafting. The provisions of this Memorandum have been
carefully negotiated by the parties and their counsel, and the parties do not
intend that the presumptions of California Civil Code Section 1654 and similar
laws or rules relating to the interpretation of contracts against the drafter of
any particular clause should be applied to this Memorandum and therefore waive
their effects.

            6.8 No Third-Party Beneficiary. The terms and provisions of this
Memorandum are intended solely for the benefit of each party hereto and their
respective successors or permitted assigns, and it is not the intention of the
parties to confer third-party beneficiary rights upon any other person.

            6.9 No Assignment; Binding Effect. Neither this Memorandum nor any
right, interest or obligation hereunder may be assigned by any party hereto
without the prior written consent of the other party hereto and any attempt to
do so will be void. Subject to the foregoing sentence, this Memorandum is
binding upon, inures to the benefit of and is enforceable by the parties hereto
and their respective successors and assigns.

            6.10 Headings. The headings used in this Memorandum have been
inserted for convenience of reference only and do not define or limit the
provisions hereof.

            6.11 Invalid Provisions. If any provision of this Memorandum is held
to be illegal, invalid or unenforceable, (a) such provision will be fully
severable, (b) this Memorandum will be construed and enforced as if such
illegal, invalid or unenforceable provision had never comprised a part hereof,
(c) the remaining provisions of this Memorandum will remain in full force and
effect and will not be affected by the illegal, invalid or unenforceable
provision or by its severance herefrom and (d) in lieu of such illegal, invalid
or unenforceable provision, there will be added automatically as a part of this
Memorandum a legal, valid and enforceable provision as similar in terms to such
illegal, invalid or unenforceable provision as may be possible.

            6.12 Governing Law. This Memorandum shall be governed by and
construed in accordance with the laws of the State of California applicable to a
contract executed and performed in such state, without giving effect to the
conflicts of laws principles thereof.

            6.13 Counterparts. This Memorandum may be executed in any number of
counterparts, each of which will be deemed an original, but all of which
together will constitute one and the same instrument.

                            [Signature Page Follows]

                                      -4-
<PAGE>

      IN WITNESS WHEREOF, the parties hereto have executed this Closing
Memorandum as of the date first above written.

                                        P-COM, INC., a Delaware corporation

                                        By: /s/ Daniel W. Rumsey
                                           -------------------------------------
                                           Name:  Daniel W. Rumsey
                                           Title:  Vice President

                                        SPEEDCOM WIRELESS CORPORATION,
                                        a Delaware corporation

                                        By: /s/ Mark Schaftlein
                                           -------------------------------------
                                           Name:  Mark Schaftlein
                                           Title:  Chief Financial Officer

<PAGE>

                                                                       Exhibit B

Merrill Printers                            $ 15,000   (Speedcom's portion)
ADP                                         $ 15,000   (Speedcom's portion)
Additional accrued payroll and vacation     $ 15,000
2 Weeks Severance                           $ 22,748
Prorated D&O premium                        $  5,300
Sara, Miguel 12-20 thru 12-31               $  4,620
Certain employees thru 12-11 thru 12-19     $  5,023
D. Darby                                    $ 35,000
RMA Reserve                                 $199,309
                                            --------
         TOTAL                              $317,000
                                            ========

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