[Asterisk-Users] Degraded voice without packet loss

[MF Hulber]

In making calls outbound through various VoIP origination providers 
people on the PSTN network have been complaining of poor voice quality.  
Diagnosing has been difficult with limited feedback but I tried using 
different originators and seem to have the same problem.  I used 
TestYourVoip.com and generally get a 4.4/5.0 MOS score with no packet 
loss but the echoed voice I hear back is definitely poor.  I'm trying to 
figure out how to go about diagnosing it or at least understanding some 
common sources of this type of problem.

Some details:

I am using IAX with ulaw.
I've tried with more than one originator.
It doesn't appear to be a problem for inbound calls.


MARK.