Maybe approach this problem at the wall socket? Could there be ground issues in the building that the telco has filters for but asterisk's box doesn't? A line conditioning UPS might help.
Moj Mark Bell wrote: > > Hey guys, > > I am trying to diagnose a hum in my FXO lines > > I am using an Adtran 750 with 8 FXO ports. I am getting a pretty bad > hum on the line during a call. > > I have checked the Telco side of the 66 block and there is no hum > there so it’s my problem to fix. > > I have tried to lower the gain but that reduces the call volume to much. > > Where else should I be looking? > > Setup as follows > > Dell PE1950 server > > Redfone Quad port fonebridge2 > > Asterisk 1.2.18 > > Zaptel 1.2.18 From redfone > > Adtran 750 Channel Bank with 8 FXO and 16 FXS > > Two PRI connections to fonebridge > > TIA > > Mark > > ------------------------------------------------------------------------ > > _______________________________________________ > --Bandwidth and Colocation Provided by http://www.api-digital.com-- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
