Nortel Networks SRG 50 NN43001-307 - Manual (Page 101)

Configuring Bandwidth Management parameters 101
G. 729 AB G. 729 AB G. 729 AB G. 729
AB G. 729 AB G. 729 AB
G. 723.1 G. 723.1 G. 723.1 G.729 A G. 729 AB G. 723.1
SRG 50 does not support G.723 codec.
Interoperability between CS 1000 and SRG
The SRG is designed to interoperate with CS 1000 in a manner similar to
MG 1000B but with a limitation with respect to codec selection policy. Calls
between branch IP Phones and branch analog phones are based on the
interzone policy rather than the intrazone policy defined in the CS 1000
main office. The zone table is updated based on the intrazone policy.
The net result of this limitation is that calls between branch IP Phone
users and the branch PSTN or between the IP Phones and branch analog
phones will always use a Best Bandwidth codec. However, the calls will
be accounted for as Best Quality. This may impact the perception of call
quality in this scenario, but it will not result in early call blocking. There is
no impact to codec selection or bandwidth usage tracking for calls that
require WAN bandwidth.
Configuring Bandwidth Management parameters
The following sections describe how to configure Bandwidth Management
in a CS 1000 network. Nortel recommends that you read the Bandwidth
Management section in Converging the Data Network with VoIP
(NN43001-260) before using the following configuration information.
Zones
Bandwidth Management Zones are configured for each endpoint on a Call
Server. The Network Bandwidth Zone number determines if a call is an
intrazone call or an interzone call. Once that is determined, the proper
codec and bandwidth limit is applied to the call.
All of the endpoints on one Call Server are configured with Zone number to
identify all of the endpoints as being in a unique geographic location in the
network. In addition, Virtual Trunks are configured with a Zone number that
is different from the endpoint Zone numbers in the Call Server.
Codec selection occurs as described in "Codec selection" (page 98) .
Configuration rules
There are four configuration rules for Bandwidth Management, as follows:
1. Each Call Server in the network must be configured with a unique VPNI,
with the only exception noted in point 2, next.
Nortel Communication Server 1000
Main Office Configuration Guide for SRG 50
NN43001-307 02.02 Standard
Release 5.0 3 December 2007
Copyright © 2005-2007, Nortel Networks
.