SAN JOSE, Calif., May 16, 2003 -- Cisco Systems, Inc., today announced that it has completed the acquisition of privately-held SignalWorks, Inc., of Mountain View, Calif. The acquisition of SignalWorks, a developer of advanced software that delivers high-performance audio and speakerphone capabilities for IP (Internet Protocol) telephony systems, advances Cisco's leadership in the fast-growing global IP telephony market.