I'm having issues with echo.

My setup is Polycom IP501 phones connected to an Adit 600 via T100P. 13 Lines going to the Adit.

All echo so far is on the local side (Employees hears own voice, but only on some calls).

Watching the channel with ztmonitor, I notice that TXGAIN is pegged out most of the time. RXGAIN is anywhere between 45 and 60%.

Is it safe to assume that playing around with the TX/RX gains on the channel bank will not do anything and this needs to be resolved via the TX gains within Asterisk?

I was able to set the TXGAIN to -6.3 and it did help some, but if I try -6.4 or more on any of the channels, I can no longer here audio when calling into the facility.
Any suggestions?

Doug

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