Exhibit 24.1 Power of Attorney The undersigned hereby make, constitute and appoint each of David J. Kapnick and Steven D. Brooks, acting jointly or individually, with full power of substitution, the true and lawful attorney- in-fact for the undersigned, in the undersigned's name, place and stead and on the undersigned's behalf, to complete, execute and file with the United States Securities and Exchange Commission (the "Commission"), all forms required under Section 16(a) of the Securities Exchange Act of 1934, as amended, relating to transactions involving the stock or derivative securities of any or all of the following entities: Cogent Communications Group, Inc., a Delaware corporation; and Proxim Corp., a Delaware corporation; and any and all amendments thereto. This Power of Attorney shall remain in effect until revoked in writing. Dated: August 8, 2003 Broadview Capital Partners L.P. By: Broadview Capital Partners Management LLC Its: General Partner By: /s/ David J. Kapnick_____________________ David J. Kapnick Chief Financial Officer Broadview Capital Partners Qualified Purchaser Fund L.P. By: Broadview Capital Partners Management LLC Its: General Partner By: /s/ David J. Kapnick_____________________ David J. Kapnick Chief Financial Officer Broadview Capital Partners Affiliates Fund LLC By: Broadview Capital LLC Its: Manager By: /s/ David J. Kapnick_____________________ David J. Kapnick Chief Financial Officer Broadview Capital Partners Management LLC By: /s/ David J. Kapnick_____________________ David J. Kapnick Chief Financial Officer Broadview BCPSBS Fund L.P. By: Broadview BCPSBS Fund LLC Its: Manager By: /s/ Paul F. Deninger _____________________ Paul F. Deninger Manager BCI Holdings, L.P. By: Broadview Holdings LLP Its: General Partner By: /s/ Paul F. Deninger _____________________ Paul F. Deninger Chief Executive Officer Broadview Holdings LLP By: /s/ Paul F. Deninger _____________________ Paul F. Deninger Chief Executive Officer /s/ Steven D. Brooks _____________________ Steven D. Brooks /s/ Stephen J. Bachmann___________________ Stephen J. Bachmann /s/ Paul F. Deninger __ ___________________ Paul F. Deninger