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Cisco Cisco SPA112 VoIP Manual

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Configuring the Voice Settings
Line 1 and Line 2 Settings (PHONE 1 and PHONE 2)
Cisco SPA100 Series Administration Guide 95
1
FAX Process NSE To use the fax process NSE feature, select yes. Otherwise, select
no.
Default setting: yes
DTMF Tx Method 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
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.
Default setting: no
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 and SIP: the value set in DTMF Tx
Strict Hold Off Time
• normal mode for AVT: 40 ms
• normal mode for SIP: 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 not set to inband; i.e. either
AVT or 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 setting: 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: no
Field Description
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