[Asterisk-Users] Loud echo with answer before dial

[Seth Mattinen]

I'm having an echo related problem with Zap channels that are answered 
before a dial takes place, such as for IVR menus or fax detection. 
Basically, it sounds like the volume gets turned up to maximum while * 
is ringing the internal extensions waiting for someone to pick up, so 
when you pick up the phone to talk, you get an over-amplified echo.

The sequence is like this:

exten => s,1,Answer
exten => s,2,Wait(2)
exten => 
s,3,Dial(SIP/201&SIP/202&SIP/203&SIP/204&SIP/205&SIP/206&SIP/207)

If you let it ring for a while before picking up, you get the horrible 
overdriven echo. It's like putting a really large value for rxgain, 
except that the volume goes down as the echo is trained out. Has anyone 
else noticed this?


--
Seth "cave quid dicis, quando, et cui" Mattinen
sethm at rollernet.us