Joint Filing Agreement

                                    Exhibit 1
                                    ---------

                             Joint Filing Agreement

     The undersigned hereby agree that the statement on Schedule 13D filed by
the undersigned with respect to the Common Stock of Proxim Corporation is, and
any amendment thereto signed by each of the undersigned shall be, filed on
behalf of each undersigned pursuant to and in accordance with the provisions of
Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.


Dated: August 5, 2002              WARBURG PINCUS PRIVATE EQUITY VIII, L.P.

                                   By:  Warburg, ▇▇▇▇▇▇ & Co.,
                                        General Partner

                                   By:  /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        -----------------------------------
                                        Name:   ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        Title:  Partner


Dated:  August 5, 2002             WARBURG, ▇▇▇▇▇▇ & CO.

                                   By:  /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        -----------------------------------
                                        Name:   ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        Title:  Partner


Dated:  August 5, 2002             WARBURG PINCUS LLC

                                   By:  /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        -----------------------------------
                                        Name:   ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        Title:  Managing Director


Dated:  ▇▇▇▇▇▇ ▇, ▇▇▇▇             ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
                                   PRIVATE EQUITY VIII C.V. I

                                   By:  Warburg, ▇▇▇▇▇▇ & Co.,
                                        General Partner

                                   By:  /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        -----------------------------------
                                        Name:   ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        Title:  Partner





Dated:  ▇▇▇▇▇▇ ▇, ▇▇▇▇             ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇
                                   PRIVATE EQUITY VIII C.V. II

                                   By:  Warburg, ▇▇▇▇▇▇ & Co.,
                                        General Partner

                                   By:  /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        -----------------------------------
                                        Name:   ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        Title:  Partner


Dated:  August 5, 2002             WARBURG PINCUS GERMANY PRIVATE EQUITY VIII KG

                                   By:  Warburg, ▇▇▇▇▇▇ & Co.,
                                        General Partner

                                   By:  /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        -----------------------------------
                                        Name:   ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇
                                        Title:  Partner