308 Provisioning IP Trunk3.01 (and later) in TM 3.1
Figure 98
DSP Profile sub-tabs ,Profile 1 Options sub-tab
TM 3.1 does not permit "V.25Fax/Modem tone detection enabled" for
IP Trunk3.01 (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 callsusing 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 VoiceActivity Detection
(VAD). See Figure 99 "NewITG Node, DSP Profile tab, Codec
sub-tab" (page 309).
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright© 2007, Nor tel Networks
.