More an echo algorithm question than a purely asterisk one... I have the following setup:
Handset - PAP2 - Asterisk - SPA3000 - Telco And no matter what I do, I get echo on a call routed out via the PSTN when I talk into the handset, in the order of a hundred ms (my estimate, could be wildly inaccurate!). Echo will occur also when I have a handset plugged into the phone port on the SPA3000 (only when the call is routed via SIP of course), but I think it's more noticeable on the PAP2 due to the increased latency. The echo occurs even when I call an automated voice service or something, so I'm thinking that possibly there is a gross impedance mismatch on my side of the telco switch. I believe the following is happening (latency measures are guesses): Handset -(0ms)- PAP2 -(40ms)- Asterisk -(40ms)- SPA3000 -(0ms)- Telco Does an EC algorithm need a measurable delay to work? The EC would have to cope with an almost unmeasurably small echo delay (the delay only creeps in on the other side of the IP link. Is there another way I should be solving this problem, especially as I can keep Asterisk in the loop if I want to? Thanks James _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
