Nortel VoIP Gateway, Configuration Manual, Page: 126 / 220

126 Example configurations
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Setting up the VoIP Gateway to use a RAD over VoIP trunks
The RAD acts as a V.32 Modem and connects using a TCM port.
Connections required for the RAD
1 On the remote Norstar, assign the RAD to an auto answer line that is connected to the VoIP
Gateway.
2 On the control Norstar, connect the PC to one of the VoIP Gateway channels.
Figure 35 Using a RAD over the VoIP Gateway
Configuring the VoIP Gateway
1 If are using a proprietary VoIP Gateway to VoIP Gateway method:
a On the Channel Settings screen, set the V32 Modem Transport Type parameter to
Bypass.
b On the Channel Settings screen, set the Fax/Modem Bypass Coder Type parameter to
G711.
This is a proprietary means of switching to the G.711 codec when the VoIP Gateway
detects modem tone. This method is not compatible with Business Communication
Manager.
If you are using a standards based method:
a On the Channel Settings screen, set the V32 Modem Transport Type parameter to
Transparent.
b On the H.323 Protocol Definition screen, set 1st Coder parameter to G.711.
Internet
Router
Router
VoIP Gateway
PC used to
connect to
RAD
RAD
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VoIP Gateway
C h a n n e l s
1 2 3 4
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VoIP Gateway