Ip Telephony Features - Avaya IP Office 8.1 Product Description

IP Telephony Features

Gatekeeper
·
The IP Office gatekeeper allows the registration of up to 384 IP extensions on the IP500, less the
number of analog and digital TDM telephones already configured on the system.
Gateway
·
The Voice Compression Module provides the H.323 gateway function that allows IP extensions to make
calls to other non-IP devices. The maximum number of simultaneous calls is limited by the number of
channels available on the Voice Compression Module. IP Office must be fitted with an optional Voice
Compression Module to enable IP telephony.
Silence Suppression
·
Silence suppression is a technique used to make the best use of available bandwidth, such as the
connection over which the caller is listening, not speaking. Silence suppression works by sending
descriptions of the background noise, rather than the actual noise itself, during gaps in conversation,
thereby reducing the number and frequency of voice packets sent on the network. Background noise is
very important during a telephone call. Without noise the call will feel very unnatural and give a
perception of poor quality. Ensure that silence suppression configuration matches at both ends of the
SCN trunk for correct operation and also for improved sound quality.
Compression
·
IP Office supports a wide range of voice compression standards including G.711, G.729a and G.722.
The method of compression can be either automatically established on a call-by-call basis or
configured on an individual extension basis.
G.722 is supported with R8 on SIP Trunks, the 9600 Series sets, 96x1 Series Sets, B179 Conference
Phones, IP Office Video Softphone, 1100/1200 IP Phones and 3
supported for 5600 and 1600 Series sets.
Fast Start
·
When fast start is supported by an IP extension, this facility reduces the protocol overhead allowing an
audio path to be established more quickly.
Out of Band DTMF
·
When out of Band DTMF is configured on an IP extension, the extension will signal to the other end of
the connection which digits need to be regenerated by a local DTMF generator on behalf of the sending
IP extension. This is useful when navigating external voicemail systems and Auto-Attendants.
Direct Media Path
·
Direct Media Path allows the speech path between two IP extensions (after call setup) to be routed
directly to each other. This allows the IP Office system to free up voice compression resources after
establishing the end to end connection, allowing the resources to be used in the most efficient way.
Auto-Create Extensions
·
IP Office can automatically create an extension entry for new IP telephones added onto the local area
network. In cases where the local area network is not secure this facility can be disabled, but simplifies
installation of IP telephone systems
Fax Transport (Avaya Proprietary)
·
Fax Transport allows fax calls to be routed over VoIP trunks between IP Office systems on an IP
network using a proprietary IP Office transport protocol.
Fax Transport T.38
·
IP Office supports the standardized protocol "T.38" for transporting FAX calls between IP Office and
SIP trunks or SIP endpoints. T.38 is only supported on IP Office 500 hardware. It requires the IP Office
to be equipped with VCM 32 or VCM 64 modules.
T.38 allows the reliable transmission of Fax messages over a IP channel independent of Codec used for
the Voice communication.
Platforms Supported:
Trunk Types Supported:
Extensions Supported:
T.38 Transport Layers Supported:
T.38 Versions Supported:
Call Types Supported:
Product Description
IP Office 8.1
IP500, IP500 V2 only, must be fitted with VCM32 or VCM64
module.
SIP
SIP
UDPTL (with optional redundancy error correction).
0-3
Voice calls which transition to fax relay on detection of fax
tones.
Calls which are negotiated as fax only.
© 2012 AVAYA All rights reserved.
rd party SIP phones. G.722 is not
Issue 26.k.- (16 August 2012)
Page 257