SIP Trunking Supported Specifications
RFC Support
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 |
Supported Protocols
SIP is the only supported signaling protocol per RFC 3261.
Transport Methods
Apeiron supports both encrypted and unencrypted UDP for transport of SIP.
SIP Methods
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 |