Exhibit 2

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, each of the undersigned Reporting Persons hereby agrees to the joint filing, along with all other such Reporting Persons, on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Common Stock, $0.001 par value, of Copper Mountain Network, Inc. and that this Agreement be included as an Exhibit to such joint filing. This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, each of the undersigned hereby executes this Agreement as of this 14^th day of February, 2005.

D. E. Shaw Laminar Portfolios, L.L.C.

By: D. E. Shaw & Co., L.L.C., as managing member

	By:		/s/ Julius Gaudio
			Julius Gaudio
			Managing Director


D. E. Shaw & Co., L.P.

By:		/s/ Julius Gaudio
		Julius Gaudio
		Managing Director


D. E. Shaw & Co., L.L.C.

By:		/s/ Julius Gaudio
		Julius Gaudio
		Managing Director


David E. Shaw

By:		/s/ Julius Gaudio
		Julius Gaudio
		Attorney-in-Fact for David E. Shaw

COPPER MOUNTAIN NETWORKS INC SC 13D