Avaya Nortel Communication Server 1000 Manual page 220

220 Codecs
The following five codecs are actually registered:
1. G.711 a-law (10 msec)
2. G.711 mu-law (10 msec)
3. G.729A (50 msec)
4. G.729AB (30 msec)
5. G.723.1 (30 msec)
Codec registration for DSPs
DSPs register the following codecs:
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When G.723.1 codec is configured on the Media Card 32-port cards, the number
of channels is reduced to 24. This is a limitation of the DSP software. The unused
channels are not registered, therefore the Call Server software does not access
them.
Minimum codecs
The minimum number of codecs registered for DSPs is four:
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Maximum codecs
The maximum number of codecs registered for DSPs is six:
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Copyright © 2003–2008, Nortel Networks
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Both G.711 a-law and G.711 mu-law codecs are always registered.
Both fax codecs (T.38 and G.711 Clear Channel) are always registered.
One best bandwidth (BB) codec, if at least one of G.729A, G.729AB,
or G.723.1 codecs is configured. The BB codec is based on the codec
type. The order of preference for choosing the BB codec is G.729AB,
G.729A, and then G.723.1.
G.711 a-law
G.711 mu-law
T.38
G.711 Clear Channel
G.711 a-law
G.711 mu-law
T.38
G.711 Clear Channel
one of G.729AB and/or G.729A, or G.723.1
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
ATTENTION