[asterisk-users] Codec negotiation : expecting G726, getting G711a (alaw)

[Philipp von Klitzing]

Also:

There are at least two implementations of the g726 codec, i.e. g726 and 
g726aal2. For this also look at the g726nonstandard setting in sip.conf. 
It is quite possible that your problem is here.

For quick testing to see if the codec works at all: Configure your phones 
to do g726 only (so no alaw/ualaw at all).

Philipp