Technical Information

Supported SIP Standards*

• RFC 3261 - SIP: Session Initiation Protocol
• RFC 2327 - SDP: Session Description Protocol
• RFC 2833 - RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
• RFC 2976 - The SIP INFO Method
• RFC 3262 - Reliability of Provisional Responses in Session Initiation Protocol (SIP)
• RFC 3265 - Session Initiation Protocol (SIP)-Specific Event Notification
• RFC 3311 - The Session Initiation Protocol (SIP) UPDATE Method
• RFC 3398 - Integrated Services Digital Network (ISDN) User Part (ISUP) to Session Initiation Protocol (SIP) Mapping
• RFC 3428 - Session Initiation Protocol (SIP) Extension for Instant Messaging
• RFC 3515 - The Session Initiation Protocol (SIP) Refer Method
• RFC 3581 - An Extension to the Session Initiation Protocol (SIP) for Symmetric Response Routing
• RFC 3842 - A Message Summary and Message Waiting Indication Event Package for the Session Initiation Protocol (SIP)
• RFC 3863 - Presence Information Data Format (PIDF)
• RFC 3891 - The Session Initiation Protocol (SIP) Replaces Header
• RFC 3903 - Session Initiation Protocol (SIP) Extension for Event State Publication
• RFC 4028 - Session Timers in the Session Initiation Protocol (SIP)
• RFC 4235 - An INVITE-Initiated Dialog Event Package for the Session Initiation Protocol (SIP)
• RFC 4566 - SDP: Session Description Protocol

Supported Codecs*

• Dialogic ADPCM
• GSM
• H.261 Video**
• H.263 Video**
• H.264 Video**
• iLBC - Internet Low Bitrate Codec**
• ITU G.711 - a-law and u-law
• ITU G.722 - 64kbps
• ITU G.723**
• ITU G.726 - 32kbps RFC 3551 and AAL2 Codeword Packing
• ITU G.729**
• LPC10 - Linear Predictor Code
• Signed Linear - 8bit and 16bit sampling
• Speex**

Supported ISDN Signaling*

• PRI NET PTP
• BRI NET PTP
• BRI CPE PTP
• BRI CPE PTMP

Supported Analog Signaling*

• FXO with Ground, Loop and Kewl start signaling
• FXS with Ground, Loop and Kewl start signaling

* gathered from the source code of Asterisk® 1.6.1.12
** passthru mode only