Soft voice between two external parties on CCM 4.2

Unanswered Question
Feb 23rd, 2007

Greetings, I have a CCM 4.2 with a MGCP controlled gateway terminating an ISDN PRI. When I make a call to an external PSTN user, the call sounds fine. When I then initiate an adhoc conference call to include a second PSTN user, the two external parties claim that they can barely hear each other (soft voice). As the IP phone user, I can still hear each party and they can both hear me.

The problem does not occur when all of the parties are IP phones or if just one of the parties is an external PSTN user. The problem only appears when there are two external PSTN users.

Any ideas?

Thanks in advance.

I have this problem too.
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b.speltz Thu, 03/01/2007 - 07:30

Configuring the necessary CAS voice-ports to use H.323 instead of MGCP will effectively work-around the problem.

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