[Asterisk-Users] Transcoding

[Dan Fernandez]

I have a Budgetone and an ATA but none of them support GSM. IŽd like to place call to the PSTN with my X100P via a WAN (64kbps).  g711 is out of the question.  Can * transcode from g723.1 to GSM?  How costly is it?  I have tried different configurations on sip.conf and extensions.conf but have had no luck.   Is this transcoding possible?