[Asterisk-Users] Degraded voice without packet loss

MF Hulber asterisk-admin at hulber.com
Mon Jun 6 11:17:05 MST 2005


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.



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