Configuring the Voice Settings
Line1 and Line 2 Settings (PHONE Port1 and PHONE2)
Cisco SPA100Series Administration Guide 97
4
DTMF Tx Mode 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
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-ofband;
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: 70 ms
FAX Enable T38 To enable the use of ITU-T T.38 standard for FAX Relay,
select yes. Otherwise select no.
Default setting: 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.
Default setting: None
Field Description
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