...The faint-hearted need not apply! SipX One product I have looked at is sipX, which is marketed as an open sourceenterprise PBX. The SIP-based VoIP product combines call routing using proxy servers from other products that are distributed...
http://www.computerweekly.com/Articles/2007/06/29/225261/sip-fundamentals.htm
...source service-oriented architecture projects. The firms aim to provide compatibility between the Celtix open sourceEnterprise Service Bus (ESB) sponsored by Iona and ServiceMix, the open source ESB supported by LogicBlaze. Oracle...
http://www.computerweekly.com/Articles/2005/10/04/212122/tech-briefs.htm