Below is the list of RFCs that are supported at the Apeiron SIP Trunking Interface.
| RFC | Description |
|---|---|
| RFC 1889 | RTP: A Transport Protocol for Real-Time Applications |
| RFC 2327 | SDP: Session Description Protocol |
| RFC 2833 | RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals |
| RFC 3261 | SIP: Session Initiation Protocol |
| RFC 3262 | Reliability of Provisional Responses in Session Initiation Protocol |
| RFC 3263 | Session Initiation Protocol (SIP): Locating SIP Servers |
| RFC 3264 | An Offer/Answer Model with Session Description Protocol |
| RFC 3326 | The Reason Header Field for the Session Initiation Protocol |
| RFC 3824 | Using E.164 numbers with the Session Initiation Protocol |
| RFC 3891 | The Session Initiation Protocol (SIP) “Replaces” Header |
| RFC 3892 | The Session Initiation Protocol (SIP) Referred-By Mechanism |
| RFC 3986 | Uniform Resource Identifi er (URI): Generic Syntax |
| RFC 4028 | Session Timers in the Session Initiation Protocol |
SIP is the only supported signaling protocol per RFC 3261.
Apeiron supports both encrypted and unencrypted UDP for transport of SIP.
The following SIP Methods are supported.
| SIP Methods | RFCs | Receive | Send |
|---|---|---|---|
| Invite | 3261 | Y | Y |
| Ack | 3261 | Y | Y |
| Cancel | 3261 | Y | Y |
| Bye | 3261 | Y | Y |
| Register | 3261 | Y | N |
| Prack | 3262 | Y | Y |
| Notify | 3265 | N | Y |