Hi Pawel,
> > echo tail for far is around 100 to 500ms no EC chip can correct for > that. > That is why EVERYBODY needs to cancel near-end echo. > 100 to 500 ms, even for national calls on the same telco ? Wow if that's the case I should stop worrying about EC tail length indeed, nothing can cope with it and the problem must be elsewhere. > If You hear echo that there is nothing You can do but to tell the > other side to upgrade to better equipment or better carrier/operator. > That makes a lot of other sides to migrate :) The problem is still that they had less (they say none, but I can't trust them) echo problems with their legacy equipment. But as Scott outlined in another email, maybe we have a tx gain problem that somehow overload the far-end (I really hope this is the case). > Operators are mandated to use CARRIER grade EC chips (128ms echo > tail) on each customer port Analog/BRI/PRI just in case the customer > has flaky equipment. When you say mandated, do you mean this is a condition in the telecom regulations (and so I can trust every operator with a telco license implements it ) ? Is this an EU telecom regulation ? Thanks, Gaetan > _______________________________________________ sipx-users mailing list sipx-users@list.sipfoundry.org List Archive: http://list.sipfoundry.org/archive/sipx-users Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users sipXecs IP PBX -- http://www.sipfoundry.org/
