Specifications

Product Description

IP Office Release 7.0

Page 246

Issue 22.a.- (21 March 2011)

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.