Hi all, Can someone give me a simple rational explanation why a $5 analog handset gives me no echo whatsoever on an analog PSTN line, but PSTN-VoIP devices such as the TDM400 and Sipuras do and thus require software-based echo cancellation. Surely a $5 analog handset does not have an "echo canceller".
The echo I mean is when I hear myself while talking to another party. I have heard it said it is because of some slowdown of the signal. But where is this mysterious bottleneck? 1. It is not in the Asterisk box because IP to IP calls do not suffer this malady 2. It is not from the Central Office to my premesis because my $5 analogue handset works without echo. Also PRI ISDN works without echo. Can anyone explain what I am missing? _______________________________________________ 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
