Cisco Ata 191 And Ata 192 Analog Telephone Adapter Administration Guide For Multiplatform Firmware - Cisco ATA 191 Administration Manual

Supplementary Service Subscription
Field
DTMF Tx Mode
DTMF Tx Strict Hold Off Time
FAX Enable T38
Hook Flash Tx Method
FAX T38 Redundancy
FAX T38 ECM Enable

Cisco ATA 191 and ATA 192 Analog Telephone Adapter Administration Guide for Multiplatform Firmware

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Description
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
This parameter is in effect only when DTMF Tx Mode is set to strict,
and when DTMF Tx Method is not set to inband; that is, 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
To enable the use of ITU-T T.38 standard for FAX Relay, select yes.
Otherwise select no.
Default setting: no
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
Select the appropriate number to indicate the number of previous packet
payloads to repeat with each packet. Choose 0 for no payload
redundancy. The higher the number, the larger the packet size and the
more bandwidth consumed.
Default setting: 1
Select yes to enable T.38 Error Correction Mode. Otherwise select no.
Default setting: yes
Voice Settings Configuration