Document:

<PAGE>
                                                                   EXHIBIT 10.68

SILICON VALLEY BANK

                          AMENDMENT TO LOAN DOCUMENTS

BORROWER:     PROXIM CORPORATION

DATED AS OF:  AS OF JULY 31, 2004

     This Amendment to Overadvance LC Rider is entered into between Silicon
Valley Bank ("Bank") and the borrower named above ("Borrower"), with reference
to the following facts:

     Bank and the Borrower are parties to the following: the Loan and Security
Agreement between them, dated December 27, 2002 (the "Loan Agreement"), the
Accounts Receivable Financing Agreement dated June 13, 2003 (the "Accounts
Agreement"), the Amended Overadvance LC Rider dated October 31, 2003 to the
Accounts Agreement (the "Overadvance LC Rider"), and the documents, instruments
and agreements relating thereto (with the Loan Agreement, the Accounts
Agreement, and the Overadvance LC Rider, collectively, the "Loan Documents").
(Capitalized terms used but not defined in this Amendment, shall have the
meanings set forth in the Accounts Agreement.)

     The parties agree as follows:

     1.  EXTENSION -- ACCOUNTS AGREEMENT. The definition of "Facility Period" in
Section 1 of the Accounts Agreement, is amended by replacing the date "July 31,
2004" therein with the date "July 30, 2005", so that is reads as follows:

         " 'Facility Period' is the period beginning on this date and continuing
         until July 30, 2005, unless the period is terminated sooner by Bank
         with notice to Borrower or by Borrower under Section 3.6."

     2.  EXTENSION -- OVERADVANCE LC RIDER. Section 2(a) of the Overadvance LC
Rider, is amended by replacing the date "July 31, 2004" therein with the date
"August 31, 2004", so that it reads as follows:

         "(a) Overadvance LCs may be outstanding only during the period from the
         date hereof to the earlier of the following (the "Overadvance Maturity
         Date"); August 31, 2004 or the date the Accounts Agreement terminates
         by its terms or is terminated by any party in accordance with its
         terms."

     3.  LITIGATION. The portion of Section 5 of the Amendment to Loan Documents
dated October 31, 2003, which presently reads:

                                      -1-
<PAGE>
     SILICON VALLEY BANK                                               AMENDMENT
--------------------------------------------------------------------------------

          Without limiting any of the Events of Default in the Loan Documents,
          any of the following shall constitute an Event of Default under the
          Loan Agreement, the Accounts Agreement and the other Loan Documents,
          upon Silicon giving Borrower written notice that it has elected to
          declare an Event of Default based on the same (which shall be a matter
          of Silicon's sole discretion): (i) any judgment shall be entered
          against Borrower in the Litigation; (ii)..."

is amended to read as follows:

          Without limiting any of the Events of Default in the Loan Documents,
          any of the following shall constitute an Event of Default under the
          Loan Agreement, the Accounts Agreement and the other Loan Documents,
          upon Silicon giving Borrower written notice that it has elected to
          declare an Event of Default based on the same (which shall be a matter
          of Silicon's sole discretion): (i) any attempt by the plaintiff to
          execute on the judgment obtained by the plaintiff in the Litigation,
          or if a stay of the judgment is not granted by August 31, 2004, or if
          a stay of the judgment is dissolved after being granted; (ii)..."

Clauses (ii), (iii), and (iv) of said Section 5 continue in full force and
effect.

     4.   FEE. In consideration for Bank entering into this Amendment, Borrower
shall concurrently pay Silicon a fee in the amount of $105,000, which is fully
earned on the date hereof, is non-refundable and is in addition to all interest
and other fees and charges payable to Silicon. Silicon is authorized to charge
said fee to Borrower's loan account or to any of Borrower's deposit accounts.

     5.   REPRESENTATIONS TRUE. Borrower represents and warrants to Bank that
all representations and warranties set forth in the Accounts Agreement, as
amended hereby, and the other Loan Documents (other than the Loan Agreement, the
representations in which were replaced by those in the Accounts Agreement) are
true and correct.

     6.   GENERAL PROVISIONS. This Amendment, and the other Loan Documents set
forth in full all of the representations and agreements of the parties with
respect to the subject matter hereof and supersede all prior discussions,
representations, agreements and understandings between the parties with respect
to the subject hereof. Except as herein expressly amended, all of the terms and
provisions of the Overadvance LC Rider, and all other Loan Documents shall
continue in full force and effect and the same are hereby ratified and
confirmed.

                                      -2-

<PAGE>
SILICON VALLEY BANK                                                  AMENDMENT
------------------------------------------------------------------------------

     IN WITNESS WHEREOF, the parties hereto have executed this Amendment to
Overadvance LC Rider as of the date first above written.

Borrower:                        Bank:

PROXIM CORPORATION               SILICON VALLEY BANK

By Michael D. Angel              By    Maria Fischer Leaf
   ---------------------------         -------------------------
   President or Vice President   Title SVP
   EVP & CFO

                                      -3-

<PAGE>
SILICON VALLEY BANK                                                    AMENDMENT
--------------------------------------------------------------------------------

                                    CONSENT

     Each of the undersigned acknowledges that its consent to the foregoing
Amendment is not required, but the undersigned nevertheless do hereby consent to
the foregoing Amendment and to the documents and agreements referred to therein
and to all future modifications and amendments thereto, and any termination
thereof, and to any and all other present and future documents and agreements
between or among the foregoing parties. Nothing herein shall in any way limit
any of the terms or provisions of the Continuing Guaranty of the undersigned,
all of which are hereby ratified and affirmed.

Proxim Wireless Networks, Inc.               Wirelesshome Corporation

By /s/ Michael D. Angel                      By /s/ Michael D. Angel
   --------------------------------             --------------------------------
Name Michael D. Angel                        Name Michael D. Angel
     ------------------------------               ------------------------------
Title CEO                                    Title CEO
      -----------------------------                -----------------------------

Proxim International Holdings, Inc.
(formerly Western Multiplex International
Holdings, Inc.)

By /s/ Michael D. Angel
   --------------------------------
Name Michael D. Angel
     ------------------------------
Title CEO
      -----------------------------

                                      -4-<PAGE>

                                                                   Exhibit 10.70

SILICON VALLEY BANK

                       AMENDMENT TO OVERADVANCE LC RIDER

BORROWER:     PROXIM CORPORATION

DATED AS OF:  AS OF OCTOBER 31, 2004

     This Amendment to Overadvance LC Rider is entered into between Silicon
Valley Bank ("Bank") and the borrower named above ("Borrower"), with reference
to the following facts:

     Bank and the Borrower are parties to the following: the Loan and Security
Agreement between them, dated December 27, 2002 (the "Loan Agreement"), the
Accounts Receivable Financing Agreement dated June 13, 2003 (the "Accounts
Agreement"), the Amended Overadvance LC Rider dated October 31,2003 to the
Accounts Agreement (the "Overadvance LC Rider"), and the documents, instruments
and agreements relating thereto (with the Loan Agreement, the Accounts
Agreement, and the Overadvance LC Rider, collectively, the "Loan Documents"),
(Capitalized terms used but not defined in this Amendment, shall have the
meanings set forth in the Accounts Agreement.)

     The parties agree as follows:

     1.     EXTENSION.  Section 2(a) of the Overadvance LC Rider, is amended by
replacing the date "October 31, 2004" therein with the date "November 30, 2004",
so that it reads as follows:

            "(a)  Overadvance LCs may be outstanding only during the period
            from the date hereof to the earlier of the following (the
            "Overadvance Maturity Date"): November 30, 2004 or the date the
            Accounts Agreement terminates by its terms or is terminated by any
            party in accordance with its terms."

     2.     FEE.  In consideration for Bank entering into this Amendment,
Borrower shall concurrently pay Silicon a fee in the amount of $5,000, which is
fully earned on the date hereof, is non-refundable and is in addition to all
interest and other fees and charges payable to Silicon. Silicon is authorized
to charge said fee to Borrower's loan account or to any of Borrower's deposit
accounts.

     3.     REPRESENTATIONS TRUE.  Borrower represents and warrants to Bank that
all representations and warranties set forth in the Accounts Agreement, as
amended hereby, and the other Loan Documents (other than the Loan Agreement, the
representations in which were replaced by those in the Accounts Agreement) are
true and correct.

     4.     GENERAL PROVISIONS.  This Amendment, and the other Loan Documents
set forth in full all of the representations and agreements of the parties with
respect to the subject matter hereof and supersede all prior discussions,
representations, agreements and understandings

                                      -1-
<PAGE>
SILICON VALLEY BANK                                                    AMENDMENT
--------------------------------------------------------------------------------

between the parties with respect to the subject hereof. Except as herein
expressly amended, all of the terms and provisions of the Overadvance LC Rider,
and all other Loan Documents shall continue in full force and effect and the
same are hereby ratified and confirmed.

     IN WITNESS WHEREOF, the parties hereto have executed this Amendment to
Overadvance LC Rider as of the date first above written.

 Borrower:                                     Bank:

 PROXIM CORPORATION                            SILICON VALLEY BANK

By /s/ Michael D. Angel                        By /s/ Maria Fischer Leaf
   ---------------------------                    ------------------------------
   President or Vice President                 Title Senior Relationship Manager
                                                     ---------------------------

                                    CONSENT

     Each of the undersigned acknowledges that its consent to the foregoing
Amendment is not required, but the undersigned nevertheless do hereby consent
to the foregoing Amendment and to the documents and agreements referred to
therein and to all future modifications and amendments thereto, and any
termination thereof, and to any and all other present and future documents and
agreements between or among the foregoing parties. Nothing herein shall in any
way limit any of the terms or provisions of the Continuing Guaranty of the
undersigned, all of which are hereby ratified and affirmed.

Proxim Wireless Networks, Inc.                   Wirelesshome Corporation

By /s/ Michael D. Angel                          By /s/ Michael D. Angel
   ---------------------------                      ----------------------------
Name Michael D. Angel                            Name Michael D. Angel
     -------------------------                        --------------------------
Title CEO                                        Title CEO
      ------------------------                         -------------------------

Proxim International Holdings, Inc.
(formerly Western Multiplex International
Holdings, Inc.)

By /s/ Michael D. Angel
   ---------------------------
Name Michael D. Angel
     -------------------------
Title CEO
      ------------------------

                                      -2-

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