Cisco Systems SPA9000 manual Default is yes

Chapter 6 SPA9000 Field Reference

FXS 1/2 Tab

Field		Description
Preferred Codec		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: G711u, G711a, G726-16,
		G726-24, G726-32, G726-40, G729a, or G723.
		The default is G711u.
Silence Supp Enable		To enable silence suppression so that silent audio frames are not transmitted, select yes.
		Otherwise, select no.
		The default is no.
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 Threshold		Select the appropriate setting for the threshold: high, medium, or low.
		The default is medium.
G729a Enable		To enable the use of the G729a 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.
G723 Enable		To enable the use of the G723a codec at 6.3 kbps, 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.
G726-16 Enable		To enable the use of the G726 codec at 16 kbps, 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.
G726-24 Enable		To enable the use of the G726 codec at 24 kbps, select yes. Otherwise, select no.
		The default is yes.
FAX CED Detect Enable		To enable detection of the fax Caller-Entered Digits (CED) tone, select yes. Otherwise,
		select no.
		The default is yes.
G726-32 Enable		To enable the use of the G726 codec at 32 kbps, select yes. Otherwise, select no.
		The default is yes.
FAX CNG Detect Enable		To enable detection of the fax Calling Tone (CNG), select yes. Otherwise, select no.
		The default is yes.
G726-40 Enable		To enable the use of the G726 codec at 40 kbps, select yes. Otherwise, select no.
		The default is yes.
	Linksys SPA9000 Administrator Guide
6-44		Document Version 3.01