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Wednesday, December 16, 2009

CME 7.1 FXS Conferencing Problem


We have a Polycom conference phone connected to a FXS port on a 2851 running CME7.1. We have configured the port to be controlled by SCCP via the stcapp command. The phone can make and receive internal and external calls without any issues, but I run into problems when trying to conference 3 parties.
Conferencing doesn't work when an external number is dialed and then another external or internal is dialed. This results in a transfer between the two parties dialed and the originating extension drops out.
On the first call which was successful at 09:03:10.384 there is a SoftKeyEventMessage displayed and two lines down it is detected as a conference softkey.
On the second call which was unsuccessful at 09:05:46.749 there is a SoftKeyEventMessage displayed and two lines down it is detected as a transfer softkey.

Diagnostic Steps
  1. Try to execute a hook flash a second time instead of the conference button.
  2. Please check the values under Telephony-Services. If you have it configured to transfer-pattern .T blind change this to transfer-pattern .T and this should solve the problem.

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