VoIP
515
SonicOS Enhanced 4.0 Administrator Guide
SIP
SonicOS provides the following support for SIP:
Base SIP standard (both RFC 2543 and RFC 3261)
SIP INFO method (RFC 2976)
Reliability of provisional responses in SIP (RFC 3262)
SIP specific event notification (RFC 3265)
SIP UPDATE method (RFC 3311)
DHCP option for SIP servers (RFC 3361)
SIP extension for instant messaging (RFC 3428)
SIP REFER method (RFC 3515)
Extension to SIP for symmetric response routing (RFC 3581)