Available values

• all
• g723 - G.723.1
• gsm - GSM
• ulaw - u-Law
• alaw - a-Law
• g726 - G.726-32
• adpcm - ADPCM
• slin - SLIN
• lpc10 - LPC10
• g729 - G.729
• speex - SPEEX
• ilbc - ILBC

See also

• Asterisk Codecs
• Variable SIP_CODEC: Set the SIP codec for the inbound (=first) call leg (see channelvariables.txt or README.variables in 1.2); Asterisk 1.6.2 also comes with SIP_CODEC_OUTBOUND for the remote (=second) call leg.