Ip Codec Set; Tdd/Tty Mode - Avaya G450 Configuration Manual

TDD/TTY Mode

Valid entry
off
US
UK
pass-through
IP codec set: page 3
The system displays this page only when you set the Modem Mode field to v150mr.
Modem Relay Preferred (NoAudio)
If you set this field to y, Communication Manager includes the NoAudio codec in the SIP SDP
offer/answer message. Enable this field when a gateway interoperates with the devices that
support offer/answer NoAudio codec. The default value is n.
Modulation Mode
Avaya V.150.1 supports the V.32, the V.34, the V.90, and the V.92 modem modulations. For
users who need other modulations, you must set the Modem Mode field to pass-through. The
following fields show whether V.150.1 is enabled to transport the respective modulations as
Modem Relay:
Configuring V.150.1 on Avaya G450 and G430 Branch Gateway
Usage
Turn off special TTY handling when using this codec set. In this case, the
TTY transmission is treated like an ordinary voice call. With a codec set
that uses G.711, this setting must send TTY calls to non-Avaya systems.
However, there might be errors in character transmissions.
For users in regions using this codec, use U.S. Baudot 45.45 mode for
TTY transmissions over IP network facilities. This is the default value for
new installations and upgrades.
For users in regions using this codec, use U.K. Baudot 50 mode for TTY
transmissions over IP network facilities.
For users in regions using this codec, use the Avaya proprietary pass-
through mode for TTY transmissions over IP network facilities.

IP codec set

May 2014 35