- Silver, 250 points or more
I have a site with a 1760 router with a VIC2-4FXO and 12.3(14)T3 IOS version. They have low volume on calls and can barely hear the person, same for calls that go to Voicemail also. The gateway is H.323.
We have adjusted input gain to the max, tried various input gain settings also and shut/no shutdown the ports to no effect. We have also tried every impedance setting with no change. I have tried doing the THL tone sweep command on the gateway and that never completes all the way, saids ERL to low. I suspect there is a line issue but the telephone carrier has been out a few times and never finds a problem with the lines.
Any ideas? Should we replace the 4 port FXO card?