Press Release

Data Connection Participates in Global SIP Interoperability Test Event, SIPit 16

SIPit 16 Advances Session Initiation Protocol (SIP) Technology

London, UK: April 15, 2005. Data Connection Limited (DCL), the world's leading independent provider of communications protocol software, announced today its participation in SIPit 16, the sixteenth SIP interoperability test event organized by the SIP Forum (www.sipforum.org).

SIPits, Session Initiation Protocol Interoperability Tests, are week-long events that enable companies with SIP implementations to come together and ensure their different implementations are compatible. The goal of the events is to refine both the protocol and its implementations. The SIPits, held twice a year, are a driving force shaping SIP into a protocol that interoperates globally for real time Internet communication services.

The latest sessions have extended to include testing of SIP with multiple media streams including voice, video, instant messaging, and email.

Data Connection successfully tested its DC-SIP solution with a variety of SIP proxies, servers, registrars, IP phones, softphones, gateways, and B2BUAs.

SIPits are becoming increasingly popular. This latest event, which took place this week in Banff, Canada, had over 50 participating companies. Tim Hall, Data Connection's VP of Network Protocols, agrees, "We are seeing more and more prospects for our DC-SIP solution asking us if we participate in the SIPit events. There is a tremendous value in proving interoperability with this many vendors and that's why we've been involved since our SIP solution started shipping in 2001."

About DC-SIP

DC-SIP is one of Data Connection's family of VoIP protocol toolkits. These provide portable source code, full reference designs, test applications, customization tools, and pre-integration with all the leading Operating Systems. The toolkits, combined with Data Connection's superior customer service organization and unrivalled commitment to quality, provide customers with significant project cost savings and the quickest time to market.

About Data Connection

Data Connection Limited (DCL) is the leading independent developer and supplier of Unicast and Multicast IP Routing, MPLS, SIP, MGCP/Megaco, ATM, and SNA portable products, as well as Web Conferencing, Voicemail, Unified Messaging, and Directory applications. The company's MetaSwitch division supplies the industry's leading Class 5 Softswitch, with both integrated (Compact Softswitch) and distributed architecture options including call agent, feature server, media gateway and signaling gateway functionality. The MetaSwitch Class 5 Softswitch has been widely deployed among incumbent and competitive local exchange carriers, as well as operators of broadband wireless, cable and fiber networks.

Net profits have exceeded 20% of revenue every year since the company was founded in 1981. Customers include BT, Cisco, IBM, Lucent, Microsoft and Verizon. With over 300 employees, Data Connection is headquartered in London, UK with US offices in Alameda, CA, Boxborough, MA, Dallas, TX, and Reston, VA. For more information please see www.dataconnection.com.

Data Connection is a trademark of Data Connection Limited and Data Connection Corporation. All other trademarks and registered trademarks are the property of their respective owners.