Armin Schindler wrote:
> 
> I can confirm this problem. When two sides use different codecs then the 
> transcodec stuff seems to be messed up.
> 
> Someone here with more knowledge about 'how this works on openpbx' ?
> 
> Armin

I'm glad somebody else is able to reproduce this problem. Which are the 
two different codecs you refer to? In my setup, I had the ISDN DID 
Dial()'ing a SIP channel (Snom 220 phone). The call should have come in 
from CAPI as alaw, hit the Snom 220 (which supports alaw/ulaw among 
others), then it was transferred to a Grandstream GXP2000 (also supports 
alaw/ulaw). The display on the GXP2000 showed the codec in use was alaw.

So, it should have been alaw all the way through.

PS: beware, Grandstream phones/ATA's do NOT support SIP reinvite, so the 
PBX will proxy all calls (even if it doesn't have to transcode).
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