Avaya Nortel Communication Server 1000 Manual page 223

Codec sorting
Before sending a codec list in FastStart and TCS messages, the codec
list must be sorted according to the BB or BQ policy. This is determined
by the following:
•
•
Codec sorting methods
There are two methods for sorting the codec list:
1. BQ sorting – the codec list is sorted so that the first codec in the list is
2. BB sorting – the codec list is sorted so that the first codec in the list is
Table 68 "BQ and BB codec sorting lists" (page 223)
sorting order for the BQ and BB codecs. To know if a codec is BQ (as
compared to another codec), see the lists in columns 1 and 2. To determine
if a codec is BB (as compared to another codec), see the lists in columns 3
and 4. The BQ or BB codec is listed at the top of the column.
Table 68
BQ and BB codec sorting lists
Best Quality (BQ) sorting
For mu-law systems
G.71_mu_law_10msec
G.711_mu_law_20msec
G.711_mu_law_30msec
G.711_a_law_10msec
G.711_a_law_20msec
G.711_a_law_30msec
G.729A_10msec
G.729A_20msec
Copyright © 2003–2008, Nortel Networks
.
the zone configuration of the IP Phone/DSP involved in the call
the zone configuration of the virtual trunk used for the call
the best BQ codec, the second codec is the second best BQ codec in
the list, and so on.
the best BB codec, the second codec is the second best BB codec in
the list, and so on.
For a-law systems
G.711_a_law_10msec
G.711_a_law_20msec
G.711_a_law_30msec
G.711_mu_law_10msec
G.711_mu_law_20msec
G.711_mu_law_30msec
G.729A_10msec
G.729A_20msec
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
Codec negotiation 223
shows the codec list
Best Bandwidth (BB) sorting
For mu-law systems
G.729AB_50msec
G.729AB_40msec
G.729AB_30msec
G.729AB_20msec
G.729AB_10msec
G.729A_50msec
G.729A_40msec
G.729A_30msec
For a-law systems
G.729AB_50msec
G.729AB_40msec
G.729AB_30msec
G.729AB_20msec
G.729AB_10msec
G.729A_50msec
G.729A_40msec
G.729A_30msec