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| RFC Number | RFC Title |
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| RFC 4733 | RTP Payload for DTMF Digits |
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| RFC 4961 | Symmetric RTP and RTCP for NAT |
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| RFC 5022 | Media Server Control Markup Language (MSCML) |
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| RFC 5627 | Obtaining and Using Globally Routable User Agent (UA) URIs (GRUU) in SIP |
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| RFC 5628 | Registration Event Package Extension for GRUU |
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| QSIG tunneling |
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| 22535 |
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| SIP Extensions for |
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| Diversion Indication in SIP |
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| Call Transfer |
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| SIP Support for |
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| SIP INFO method for DTMF digit transport and collection |
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| Signaled Telephony Events in the Session Initiation Protocol |
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| Connection Reuse in SIP |
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| SIP Package for Voice Quality Reporting Event, using SIP PUBLISH |
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| Transporting User to User Information for Call Centers using SIP |
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| The Calling Party's Category tel URI Parameter |
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Note: The following SIP features are not supported:
•Preconditions (RFC 3312)
•SDP - Simple Capability Declaration (RFC 3407)
•S/MIME
•Outbound, Managing
•SNMP SIP MIB (RFC 4780)
•SIP Compression – RFC 5049 (SigComp)
•ICE (RFC 5245)
•Connected Identity (RFC 4474)
SIP Release Notes | 118 | Document #: |