[asterisk-users] Simplex voice on TDM410P

[Nathanial A. Byrnes]

Hello,
   I am working on a trixbox based system with a TDM410P connected to 3 
phone lines from the CO. The asterisk box is on a full duplex 100Mb LAN 
with some polycom and Aastra SIP phones. In general everything works. 
the problem I am trying to solve is that if both parties to a call speak 
at the same time one of the voices gets cut out such that the talker A 
cannot hear what talker B is saying. When talker A stops talking, he/she 
can then hear what talker B says. This issue occurs across all the 
different phones we have set up. I have played with the OSLEC settings 
in the thoughts that the echo cancellation was being a bit ambitious, to 
no avail. Any recommendations on how to best troubleshoot / correct this 
issue?

    Thanks and Regards,
    Nate