Screechy and Static Noice when talking on Speaker with 7940 and 7960 phones
I am reaching out for help on a voice quality issue and I would like to thank in advance to anyone who responds.
I am running CCM 4.1.3 sr5d with H.323 gateway and FXOs to PSTN. I am experiencing a weird screechy/static noise when talking on speaker and the issue only occurs on PSTN calls and only when talking on speaker. I am experiencing the same issue at all locations with FXOs to PSTN. I have other locations with PRI and they are not experience this issue. And I am using 7960 and 7940 phones at all locations.
I have adjusted the input gain and out attenuation values but that didn't seem to help.
Any response from anyone is highly appreciated !!!!
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