Linksys SPA921 Cisco SPA9000 Voice System Administration Guide - Page 251

SPA9000 Field Reference Voice tab B FAX CED Detect Enable G726-32 Enable FAX CNG Detect Enable G726-40 Enable FAX Passthru Codec DTMF Process INFO FAX Codec Symmetric DTMF Process AVT FAX Passthru Method DTMF Tx Method To enable detection of the fax Caller-Entered Digits (CED) tone, select yes. Otherwise, select no. Default: yes To enable the use of the G726 codec at 32 kbps, select yes. Otherwise, select no. Default: yes To enable detection of the fax Calling Tone (CNG), select yes. Otherwise, select no. Default: yes To enable the use of the G726 codec at 40 kbps, select yes. Otherwise, select no. Default: yes Select the codec for fax passthrough, G711u or G711a. Default: G711u To use the DTMF process info feature, select yes. Otherwise, select no. Default: yes To force the SPA9000 to use a symmetric codec during fax passthrough, select yes. Otherwise, select no. Default: yes To use the DTMF process AVT feature, select yes. Otherwise, select no. Default: yes Select the fax passthrough method: None, NSE, or ReINVITE. Default: NSE 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. Default: Auto SPA9000 Voice System Administration Guide 249