Suppression Of Dtmf Forwarding - Polycom RMX 1500 Administrator's Manual

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On the Codian gateway Content is not supported with line rates of 128Kbps
and below.
•
When using the following topology:
H.323 endpoint ->Codian Gateway -> ISDN Link -> RMX -> H.323 endpoint,
the Codian Gateway is unable to send DTMF and the call is disconnected
(VNGFE- 3587).
•
Sending Content from a participant over Radvision Gateway to a
conference/participant, the GWP20 patch must be installed in the RadVision
gateway:
On the Radvision gateway, open the GWP20 User Interface. Click Settings/
Advanced Commands. In the Command box enter H239OlcPatch. In the
Parameters box enter Enable and then click Send.

Suppression of DTMF Forwarding

Forwarding of the DTMF codes from one conference to another over an
ISDN cascading link is not automatically suppressed as with IP cascading
link and it can be limited to basic operations while suppressing all other
operations by a system flag:
DTMF_FORWARD_ANY_DIGIT_TIMER_SECONDS.
Chapter 3-Cascading Conferences
3-17