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44 Avaya Application Solutions IP Telephony Deployment Guide
The G450 can support up to 450 users when deployed as a branch gateway in a mid to large
branch office of a large enterprise or a call center, and can serve up to 2400 users when
deployed as a campus gateway. Both configurations require Avaya Communication Manager IP
telephony software running on one or more Avaya S8xxx Servers. The 450 user capacity is
reached when the Avaya S8300 server is used and the 2400 user capacity is reached when the
Avaya S8500 Server is used.
Telephone services on a G450 are controlled by the Avaya S8700-series, S8500, and S8400
Servers as External Call Controllers (ECCs) over the LAN or WAN. The G450 also supports the
Avaya S8300 Server operating either as an ECC or as an Internal Call Controller (ICC), with the
S8300 embedded in the G450.
An S8300 ICC can be used in addition to an ECC with the S8300 installed in the G450 as a
Local Survivable Processor (LSP) designed to take over call control in the event that the ECC
fails or the WAN link between the branch office and main location breaks. The LSP provides full
featured telephone service survivability for the branch office. The G450 itself also features
Standard Local Survivability (SLS), which provides basic telephone services in the event that
the connection with the primary ECC is lost.
The G450 is a scalable device with a basic configuration consisting of 1 power supply unit
(PSU), 256 MB RAM, and a single DSP childboard supporting either 20 or 80 VoIP channels.
This configuration can be enhanced by adding a redundant PSU, up to two RAM modules of 1
GB each, and up to three additional DSP childboards, increasing the number of VoIP channels
to 240 channels.
G450 Features
G450 features include:
● Modular gateway features:
- 9-slot chassis (one slot for main board and eight slots for media modules)
- Swappable main board module
- Hot swappable media modules
- Support for two load sharing hot swappable power supply units
- Hot swappable fan tray
- VoIP DSPs (up to 240 channels)
- Memory SIMMs
- Contact Closure support
● Voice features:
- H.248 gateway
- Voice line interfaces: IP phones, Analog phones, Avaya DCP phones, BRI Phones,
FXS/Fax, VoIP, Fax and modem over IP
- Voice trunk interfaces: FXO, BRI, T1/E1