[Asterisk-Users] Huge Echo

[Marek Zachara]

Hello

In the following setup: 
call coming from a pstn line -> into FXO card -> asterisk -> SIP phone 

i get an incredible loud echo in the SIP phone (about 0,5-1s) (everything i 
speak into SIP phone microphone i hear in its speaker). The person calling 
from PSTN is not getting any echo.

Which piece of the call could be causing the trouble so i can look into it?

thanks,
Marek