> > You know what.. I have sporadic echo issues too and I just checked my > > dmesg and also see that! What's this all about? > > *STOP* > > You will receive these messages if you send or receive faxes. I asked for > this particular procedure to be executed because I was curious to see if > zaptel was seeing an echo cancel disable tone when calling the numbers with > extreme echo. > > Again, this is NORMAL to see and EXPECTED if you are sending or receiving > faxes. He's not calling a fax machine (I suspect he's not anyway) so I > wanted to make sure that the zaptel echocan was NOT hearing the disable tone.
Identifying why a echo cancel tone is occurring on a normal voice call is reasonable, but why would a _local_ echo canceller be needed on a four-wire full-duplex digital link? If the end-to-end call is digital all the way, there really isn't a need for it. So, isn't the issue one of who has responsibility for inserting the echo canceller when a 4-wire to 2-wire hybrid is involved? (Obviously, its not the originating site since one would have no idea what the destination site is doing.) Or, is there an assumption going on that says an echo canceller is always needed on all pstn calls regardless of whether is doing anything or not? _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
