London, UK and Alameda, CA: October 14, 2004. MetaSwitch, a leading vendor of Class 5 softswitch solutions, has successfully demonstrated H.248, SIP, MGCP and SS7 interoperability at the Global Multiservice Switching Forum (MSF) Interoperability event, GMI 2004. A MetaSwitch VP3500 Series Softswitch, comprised of a MetaSwitch Media/Signaling Gateway and separate MetaSwitch Call Agent, was located at British Telecom's GMI facilities in Ipswich and successfully interoperated with call agent, media gateway, access gateway and customer premise equipment from multiple vendors.