Echo Question

General Help
1

I have been told by my users that when they recieve calls from the inbound pots lines that terminate to an FXO card, they get echo. The caller doesn’t hear any echo, just the end user recieving the call. If they recieve a call over SIP from across the network there is no echo.

Thoughts? What information would be useful to help determine what’s going on?

Thank You

PBX Firmware:
5.211.65-3

PBX Service Pack:
1.0.0.0

2

Echo on an analog phone line is caused by an impedance mismatch.

Have you run the fxotune procedure?

3

Are you using Hardware Echo Cancellation on your PSTN card. We always recommend this with Analog lines as well over 50% of the time we see echo without it.

4

And 4 out of 5 dentists recommend it.

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