Intermittent call failure: SIP 2 - Can't find matching codec in SDP

Question

Hi, 

I am using freevoiddeal. Outgoing calls do not work reliably and often fail with:

SIP 2 - Can't find matching codec in SDP service or option not implemented, unspecified.

X-lite works flawlessly.

Any idea how to debug this or what to try to get it working?

Thanks and best regards,

Thomas 

Answer 1

Go to Zoiper account settings and make sure the codec your VoIP provider uses matches the codec used by Zoiper.  This should take care of the problem.