ATA Voice Field Reference
Line page
Cisco Small Business ATA Administration Guide 172
B
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 eypents. INFO uses the SIP INFO method. Auto uses
InBand or AVT based on the outcome of codec negotiation.
The default is Auto.
DTMF Tx Mode
DTMF Detection Tx Mode is available for SIP information
and AVT . Options are: Strict or Normal. The default is
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
DTMF Tx Strict
Hold Off Time:
This parameter is in effect only when "DTMF Tx Mode" is
set to "strict," and when"DTMF Tx Method" is set to out-of-
band; i.e. either AVT or SIP-INFO. The value can be set as
low as 40 ms. There is no maximum limit. A larger value will
reduce the chance of talk-off (beeping) during
conversation, at the expense of reduced performance of
DTMF detection, which is needed for interactive voice
response systems (IVR).
Default: 90 ms
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.
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