Cisco SPA501G Administration Guide - Page 309
end: InBand, AVT, INFO, Auto, InBand+INFO, or, DTMF Tx Method
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Cisco SPA IP Phone Field Reference Ext Tab A Parameter G726-32 Enable G726-40 Enable Release Unused Codec DTMF Process AVT Silence Supp Enable DTMF Tx Method Description To enable the use of the G.726 codec at 32 kbps, select yes. Otherwise, select no. Defaults to yes. To enable the use of the G.726 codec at 40 kbps, select yes. Otherwise, select no. Defaults to yes. NOTE Not applicable to the Cisco SPA525G or Cisco SPA525G2. Allows the release of codecs not used after codec negotiation on the first call so that other codecs can be used for the second line. To use this feature, select yes. Defaults to yes. Select yes to process RTP DTMF events. Otherwise, select no. If this parameter is set to no, the AVT payload type is not included in outbound SDP. Defaults to yes. To enable silence suppression so that silent audio frames are not transmitted, select yes. Otherwise, select no. Defaults to no. Select the method to transmit DTMF signals to the far end: InBand, AVT, INFO, Auto, InBand+INFO, or AVT+INFO. InBand sends DTMF using the audio path. AVT sends DTMF as AVT events. INFO uses the SIP INFO method. Auto uses InBand or AVT based on the outcome of codec negotiation. Defaults to Auto. Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 308