[Asterisk-Users] iaxtel - best codec

[Eric Wieling aka ManxPower]

Joseph wrote:
> What is the best codex for iaxtel?
> When I set in iax.conf
> 
> bandwidth=high
> disallow=all
> allow=ulaw
> 
> The call will not go through, if I set allow=all
> it sets the format to ADPCM and the first 15sec. or so the voice is
> choppy, it is hard to understand anything.
> 
> Is it reliable/practical to terminate 1800 calls via iaxtel? 

IAXtel only officially supports the GSM codec.  Use that codec and no 
other codec.