1.3 Specifications
1.3 Specifications
For details about the RFCs and protocols for the
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SIP RFCs |
| RFC3261 (UDP only) | |
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| RFC3262 (PRACK) | |
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| RFC3264 (Offer/Answer) | |
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| RFC3311 (UPDATE) | |
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| RFC3581 (Symmetric Response Routing/rport) | |
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| RFC4028 (Session Timer) | |
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CODECs |
| G.711 | |
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| G.729A | |
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Voice Options |
| Echo Cancellation (48 ms) | |
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| Jitter Buffer (200 ms) | |
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| VAD (Voice Activity Detection) | |
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| PLC (Packet Loss Concealment) | |
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DTMF Relay |
| Inband/Outband (RFC2833) | |
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Fax Relay |
| G.711 Inband/T.38 | |
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Protocol/Function |
| RTP | |
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| RTCP | |
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| DNS (A/SRV) | |
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| NAT Traversal (STUN) | |
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| QoS (ToS field setting in IP header of RTP/RTCP) | |
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Programming Manual for Virtual SIP Trunk Card
9