Most commonly this is accomplished through OC-X connectivity. CPA interconnection usually is not a question of SIP Trunking, but of the carrier's physical layer access interconnection capabilities and ...

For two codecs to successfully communicate via SIP through a SIP server, information must be exchanged between the two devices. Codecs manufactured by members of the Audio-via-IP Experts Group are SIP ...

Growing interest in SIP-enabled communications — from VoIP to SIP-based collaboration apps such as Microsoft’s LCS (Live Communications Server) 2005 — has sparked the need to better secure SIP traffic ...