As far as I know Asterisk is the only router that does transcoding between call legs including both media and signaling. I have tested only SIP to H323 (GSM to G711). Cisco will support transcoding beginning with Q3 for 2621XM family (between G729 and G711). Regards Adrian Does anyone know of a media proxy that will transcode between g.711 and iLBC? Thanks, Jamey