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308 Provisioning IP Trunk 3.01 (and later) in TM 3.1
Figure 98
DSP Profile sub-tabs ,Profile 1 Options sub-tab
TM 3.1 does not permit "V.25 Fax/Modem tone detection enabled" for
IP Trunk 3.01 (and later) and ITG Trunk 2.x. This is because the IP
trunk cards do not have a mechanism for properly handling modem
calls. IP Trunk 3.01 (and later) does not officially support modem
calls. The only way modem calls can be made is if G.711 is the first
choice for both endpoints. Even then, modem calls might still be lost
due to latency and packet loss, which is inherent with IP networks.
Fax calls using the "V.21 Fax tone detection" (14.4 baud and below)
are supported.
Codec options
14
Place the codecs in the preferred sequence (most desirable to least
desirable). Configure the payload size and delay settings.
15
Click the check box to enable or disable Voice Activity Detection
(VAD). See Figure 99 "New ITG Node – DSP Profile tab - Codec
sub-tab" (page 309).
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 01.01 Standard
Release 5.0 30 May 2007
Copyright © 2007, Nortel Networks
.