The SIP DTMF Trigger Detection and Notification functionality enables the SBC Core to look for specific DTMF trigger patterns and to notify an external SIP entity when such patterns are detected. If a mid-call trigger is configured for a call, it is activated as soon as the call is connected. When the SBC Core detects DTMF input matching the pattern criteria of the trigger, it sends the DTMF input in a SIP INFO message to the SIP call peer with content type application/DTMF.

The values are:

  •  Egress
  •  Ingress

To View DTMF Trigger

On the SBC main screen, go to Configuration > Profile Management > Category: DTMF Trigger Profile > DTMF Trigger.

The DTMF Trigger window is displayed.


To Edit DTMF Trigger

To edit any of the DTMF Trigger in the list, click the radio button next to the specific DTMF Trigger name.

The Edit Selected DTMF Trigger window is displayed below.



Parameter

Description

Name

Specifies the DTMF name.

State

Specifies the administrative state of this DTMF trigger.
• disabled—Disables the DTMF trigger.
• enabled—Enables the DTMF trigger.

Pattern

Indicates the pattern in digit-regular expression on which the SBC Core should match. Multiple patterns can be strung together using "." If you do not enter a pattern value, S# is assumed to be the default.

Interdigit
Timeout

Specifies the interdigit timer (maximum time between digits) in milliseconds. If 0 is specified, the timer is disabled. Must be 0 to 65535. The default value is 4000.

Longdigit
Duration

Specifies the duration in milliseconds for a digit to be considered long. If 0 is specified, long digits are disabled. Must be 0 to 65525. The default value is 2000.

Make the required changes and click Save at the right hand bottom of the panel to save the changes made.




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