Thanks for the replies! The analog card is a TDM400P. The system is currently using asterisk-1.4 r81383 and zaptel-1.4 r2649.
I am told that the problem did not exist when the system was using asterisk-1.2.10 and zaptel 1.2.9.1. -Brian On 12/31/07, Brian Alexander <[EMAIL PROTECTED]> wrote: > > I have been trying to track down the cause/fix for a problem and I am out > of ideas... I am hoping one of you can point me in the right direction. > > The symptom is that when a calls is placed from an internal extension > through an analog line to a number on the pstn the caller can hear the > callee but the callee can not hear the caller for as long as ten seconds. > > The problem appears to happen fairly consistently on the same pstn > numbers. However, I have not seen a common characteristic in those numbers. > For example, one of them is a direct number to a cell phone and another is > to a Verizon fiber-optic phone/data service. > > The problem does not seem to be related to the type of SIP phone being > used by the caller - for example, we have tried both X-Lite and Polycom > phones without a change in behavior. > > The problem does not appear to occur if the callee then calls into our > system (at least the one time I was able to have this happen). > > Turning on or off echo cancellation and/or call progress does not seem to > change the behavior. > > I will appreciate any ideas you have. I am certainly stumped. > > Thanks and Happy New Year! > -Brian >
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