⢠Session Initiation Protocol (SIP) v2 (RFC 3261, 3262, 3263, 3264)
⢠SIP proxy redundancy - dynamic via DNS SRV, A records deregistration with primary SIP proxy server
⢠SIP support in network address translation (NAT) networks (including Serial Tunnel [STUN])
⢠Highly secure (encrypted) calling via prestandard implementation of Secure RTP
⢠Codec name assignment