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ATA Voice Field Reference
PSTN Line page (SPA3102)
ATA Administration Guide 200
B
FAX Codec
Symmetric
To force the ATA device to use a symmetric codec during
fax passthrough, select yes. Otherwise, select no.
The default is yes.
DTMF Process AVT This field is not available for the PAP2T. To use the DTMF
process AVT feature, select yes. Otherwise, select no.
The default is yes.
FAX Passthru
Method
Select the fax passthrough method: None, NSE, or
ReINVITE.
The default is NSE.
DTMF Tx Method 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.
The default is Auto.
FAX Process NSE To use the fax process NSE feature, select yes. Otherwise,
select no.
The default is yes.
Hook Flash Tx
Method
Select the method for signaling hook flash events: None,
AVT, or INFO. None does not signal hook flash events. AVT
uses RFC2833 AVT (event = 16). INFO uses SIP INFO with
the single line signal=hf in the message body. The MIME
type for this message body is taken from the Hook Flash
MIME Type setting.
The default is None.
FAX Disable ECAN If enabled, this feature automatically disables the echo
canceller when a fax tone is detected. To use this feature,
select yes. Otherwise, select no.
The default is no.
Release Unused
Codec
This feature allows the release of codecs not used after
codec negotiation on the first call, so that other codecs can
be used for the second line. To use this feature, select yes.
Otherwise, select no.
The default is yes.