JOINT FILING AGREEMENT

In accordance with Rule 13(d)-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with each other of the attached statement on Schedule 13G and to all amendments to such statement.

IN WITNESS WHEREOF, the undersigned hereby execute this agreement on February 14, 2006.

CISCO SYSTEMS CAPITAL CORPORATION
By:	/s/    David Rogan
	David Rogan
	President
CISCO SYSTEMS, INC.
By:	/s/    Betsy Rafael
	Betsy Rafael
	Vice President, Corporate Controller and Principal Accounting Officer