[Asterisk-Users] Any gsm -> g7231 codec translator?

[cmisip]

Is there such a thing so I can call fwd from ohphone using a low
bandwidth codec?

What program can I use to transcode the gsm sound files in asterisk 
into g7231 format?  

If there is no way to do the above, what codec do you guys recommend if
one endpoint is a dialup connection (the other broadband cable).  I am
using quicknet phonejacks on either end.




Thanks.