Cisco SPA112 Administration Manual page 97

Configuring the Voice Settings
Line 1 and Line 2 Settings (PHONE Port1 and PHONE2)
Cisco SPA100Series Administration Guide
Field
FAX Passthru
Codec
FAX Codec
Symmetric
DTMF Process
INFO
FAX Passthru
Method
DTMF Process
AVT
FAX Process NSE
DTMF Tx Method
FAX Disable ECAN
Description
Select the codec for fax passthrough, G711u or G711a.
Default setting: G711u
To force the ATA to use a symmetric codec during fax
passthrough, select yes. Otherwise, select no.
Default setting: yes
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
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