8.3.5 Virtual SIP Trunk Card Specifications
For details about the RFCs and protocols for the
V-SIPGW16 card, refer to the following specifications.
Items Specification
SIP RFCs RFC3261 (UDP only)
RFC3262 (PRACK)
RFC3264 (Offer/Answer)
RFC3311 (UPDATE)
RFC3581 (Symmetric Response Routing/rport)
RFC4028 (Session Timer)
Codecs G.711 (a-law and µ-law)
G.729A
Voice Options Echo Cancellation (48 ms)
Jitter Buffer (200 ms)
VAD (Voice Activity Detection)
*1
PLC (Packet Loss Concealment)
DTMF Relay Inband/Outband (RFC2833)/Outband (SIP INFO)
Fax Relay G.711 Inband/T.38
Protocol/Function RTP
RTCP
DNS (A/SRV)
NAT Traversal (STUN)
QoS (ToS field setting in IP header of RTP/RTCP)
*1
VAD is only available for codec
G.711.
Installation Manual 357
8.3.5 Virtual SIP Trunk Card Specifications
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