Question : Echo on Linksys SP941 IP Phone

Hi, I'm running an Asterisk server and configured outside calling.  When i call in using and outside phone and pick up with the Linksys SP941 SIP phone, I hear major echo.  Does anyone know how to troubleshoot/resolve such an issue?  Is it a setting on the phone or is it on the Asterisk server?

I'll greatly appreciate the help...

Answer : Echo on Linksys SP941 IP Phone

No problem at all.

As far as the T1/PRI vs FXO, absolutely... however it will all depend on the telco. The T1 may or may not have echo cancellation alerady on the line. So you will pretty much have to go through the same process to find the right settings for the T1 as it's unlikely they will be the same as your POTS FXO port.

Also make sure you do lots of RTFMing as it will help your understand who, what, why echo occurs...

http://www.voip-info.org/wiki/view/Asterisk+echo+cancellation
http://www.voip-info.org/wiki/view/Causes+of+Echo
http://www.voip-info.org/wiki/view/Asterisk+echo+avoidance