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