Cisco SPA112 Administration Manual page 106

Configuring Voice
Configuring Voice Settings
Cisco SPA100 Series Phone Adapters Administration Guide
Field
DTMF Process INFO
FAX Passthru Method
DTMF Process AVT
FAX Process NSE
DTMF Tx Method
FAX Disable ECAN
DTMF Tx Mode
Description
To use the DTMF process info feature, select yes.
Otherwise, select no. Default setting: Yes
Select the fax passthrough method: None, NSE, or
ReINVITE. Default setting: NSE
To use the DTMF process AVT feature, select yes.
Otherwise, select no. Default setting: Yes
To use the fax process NSE feature, select yes.
Otherwise, select no. Default setting: Yes
Select the method to transmit DTMF signals to the far
end: InBand, AVT, INFO, or Auto. InBand sends DTMF
by 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 setting: Auto
If enabled, this feature automatically disables the
echo canceller when a fax tone is detected. To use
this feature, select yes. Otherwise, select no. Default
setting: No
DTMF Detection Tx Mode is available for SIP
information and AVT. Options are: Strict or Normal.
Default setting: Strict for which the following are true:
• A DTMF digit requires an extra hold time after
detection.
• The DTMF level threshold is raised to -20 dBm.
The minimum and maximum duration thresholds are:
• strict mode for AVT: 70 ms
• normal mode for AVT: 40 ms
• strict mode for SIP info: 90 ms
• normal mode for SIP info: 50 ms
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