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VoIP Standards Supported

IP Office supports the following protocols and standards:

H.323 V2 (1998), Packet-based multimedia communications systems.
Q.931, ISDN user-network interface layer 3 specification for basic call control.
H.225.0 (1998), Call signaling protocols and media stream packetization for packet-based multimedia communication systems.
H.245 (1998), Control protocol for multimedia communication.
Session Initiation Protocol.
Audio CODECs:
G.711 A-law/U-law (64K).
G.723.1 MP-MLQ (6.3K).
G.729 Annex A, Annex B, Annex AB – CS-ACELP.
Silence Suppression.
Fax Relay (IP Office to IP Office Fax Transport over IP).
T.38 Fax support (SIP trunks and SIP endpoints).
Local End Echo Cancellation 25ms.
Out of band DTMF.
Jitter buffer, 5 frames of jitter buffer.
Internet Standards/Specification (in addition to TCP/UDP/IP).
RFC 1889 – RTP/RTCP, Real Time and Real Time Control Protocol.
RFC 2507, 2508, 2509 – Header Compression.
RFC 2474 – DiffServ, Type of Service field configurable.
RFC 1990 - PPP Fragmentation.
RFC 1490 - Encapsulation for Frame Relay.
RFC 2686 - Multiclass Extensions to Multilink PPP.
RFC 3261 - Session Initiation Protocol (SIP).
RFC 3489 - STUN.

© 2010 AVAYA
15-601041 Issue 20.f.-
18:14, 25 February 2010

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Last Modified: 25/01/2010