Avaya IPO R9 SOFTPHONE PLDS LIC 273945 Manuel D’Utilisation

Product Description
IP Office 9.0

© 2014 AVAYA All rights reserved.

Page 293

Issue 27.02.0 (Monday, January 06, 2014)

Flow control is a congestion-control mechanism that prevents data loss at congested ports. Flow control
prevents packet loss by controlling the flow of data from the transmitting device to ensure that the receiving
device can handle all of the incoming data.

IEEE 802.3 flow control is used on Avaya IP telephones operating in full-duplex mode. If the receiving device
becomes congested, it sends a pause frame to the transmitting device. The pause frame instructs the
transmitting device to stop sending packets for a specific period of time. The transmitting device waits the
requested time before sending more data.

 

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:

o

G.711 A-Law/Mu-Law (64K).

o

G.723.1 MP-MLQ (6.3K).

o

G.722.

·

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).

o

RFC 1889 – RTP/RTCP, Real Time and Real Time Control Protocol.

o

RFC 2507, 2508, 2509 – Header Compression.

o

RFC 2474 – DiffServ, Type of Service field configurable.

o

RFC 1990 - PPP Fragmentation.

o

RFC 1490 - Encapsulation for Frame Relay.

o

RFC 2686 - Multiclass Extensions to Multilink PPP.

o

RFC 3261 - Session Initiation Protocol (SIP).

o

RFC 3489 - STUN.