Nortel Networks Remote Gateway 50 - Manual (Page 56)

Page 56 of 258 Bandwidth Management
553-3001-207 Standard 2.00 January 2006
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
(553-3001-160) before using the following configuration information.
Table 4
“Best Bandwidth” algorithm — codec type
G.711 A law G.711 mu-law G.729 A G. 729 AB G. 723.1
G.711 A-law
G.711 A-law G.711 mu-law G.729 A G. 729 AB G. 723.1
G.711 mu-law
G.711 mu-law G.711 mu-law G.729 A G. 729 AB G. 723.1
G.729 A
G.729 A G.729 A G.729 A G. 729 AB G.729 A
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