Chapter 3: Summary Of Services; Media Gateway Services; Voice Over Ip (Voip) - Avaya G450 Manual

Chapter 3: Summary of services

The G450 offers various services, which are described in
LAN services

Media gateway services

The Avaya G450 Media Gateway provides a telephone exchange service, supporting the
connection of various types of telephones and outside telephone lines. Telephones and lines
are connected to the G450 via media modules on the chassis. Different media modules provide
access ports for different types of telephones and lines.
Telephony services are controlled by a media gateway controller (MGC) running Avaya
Communication Manager (CM) call processing software. You can use the Avaya CM to
configure many advanced telephone exchange functions. For more information, see the
Administrator's Guide for Avaya Communication Manager, 555-233-506.
This section describes the services the G450 provides as a media gateway.

Voice over IP (VoIP)

The Avaya G450 Media Gateway features up to four VoIP DSPs that provide voice services
over IP data networks. The G450 allows you to use many types of telephones and trunks that
do not directly support VoIP. The G450 translates voice and signalling data between VoIP and
the system used by the telephones and trunks, as follows: Avaya media modules convert the
voice path of traditional circuits such as analog trunk, T1/E1, and DCP to a TDM bus inside the
G450. The VoIP engine then converts the voice path from the TDM bus to a compressed or
uncompressed and packetized VoIP on an Ethernet connection.
The G450 provides VoIP services over the LAN and WAN. The G450 supports up to four VoIP
DSP childboards. Two types of childboard are supported, one providing 80 active VoIP
channels and the other providing 20 active VoIP channels. The maximum number of active
channels supported is 240. All channels can be bi-directional FAX, G.711 u/A, G.726A, or
G.729A/AB calls.
on page 31, and WAN services
Media gateway services
on page 32.
on page 25,
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