I changed from a tdm100B card over to an Adtran 750 as I added more PSTN
lines last week. I have a Sangoma A104u card and 12 channels FXO
connected to PSTN lines. I am experiencing very poor audio quality with
hum on the lines and poor volume. When I connected the Adtrans I
upgraded the firmware to the latest and reset the config to the factory
default. I also upgraded Asterisk to 1.2.
I am at a loss to explain why the quality has become so poor, has anyone
any advice?
--
Chris Mason
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