Cisco SRP521W-K9-G1 Administration Guide - Page 172

6 172 Configuring Voice Configuring Voice Settings Third Preferred Codec Third preferred codec for all calls. (The actual codec used in a call still depends on the outcome of the codec negotiation protocol.) Select one of the following:.Unspecified, G711u, G711a, G726-16, G726-24, G726-32, G726-40, G729a, or G723. The default is Unspecified. Use Pref Codec Only To use only the preferred codec for all calls, select yes. (The call fails if the far end does not support this codec.) Otherwise, select no. The default is no. Silence Supp Enable To enable silence suppression so that silent audio frames are not transmitted, select yes. Otherwise, select no. The default is no. Silence Threshold Select the appropriate setting for the threshold: high, medium, or low. The default is medium. G729a Enable To enable the use of the G.729a codec at 8 kbps, select yes. Otherwise, select no. The default is yes. Echo Canc Enable To enable the use of the echo canceller, select yes. Otherwise, select no. The default is yes. Echo Canc Adapt Enable To enable the echo canceller to adapt, select yes. Otherwise, select no. The default is yes. Echo Supp Enable To enable the use of the echo suppressor, select yes. Otherwise, select no. The default is yes. FAX V21 Detect Enable To enable detection of V21 fax tones, select yes. Otherwise, select no. The default is yes. Cisco SRP500 Series Services Ready Platforms Administration Guide (SRP520 Models)