[Asterisk-Users] Poor sounds on Adtran 750

[Chris Mason (Lists)]

I have had my linesman go over the lines on the pole and manhole and 
remake the connections, I have played with the milliwatt generator to 
dial out and back to another number, measuring with ztmonitor to 
establish the levels, and I have played with the echo canceller 
settings. I still get hum and crappy audio with lots of  echo. When I 
listen to the lines with a butt set they sound clear, no hum.
Has any successfully used an Adtran 750 with PSTN lines? I have several 
and changing the unit or cards does not improve the quality.

-- 
Chris Mason
NetConcepts
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