Use this screen to configure DTMF digit detection attributes for a Digit Profile.

To View and Edit DTMF Detect

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

Select the desired Digit Profile from the drop-down list to view its respective DTMF Detect parameters.

The DTMF Detect window is displayed.

Profile Management - Digit Profiles - DTMF Detect

DTMF Detect Parameters

ParameterLength/RangeDescription
Min Power

-45 dBm to -25 dBm

The minimum power level (in dBm) for digit detection. Default = -45.

Min On Duration

25 to 80 ms

The minimum tone duration (in milliseconds) for digit detection. The value must be in increments of 5 ms. Default = 35.

Min Off Duration

25 to 80 ms

Specifies minimum tone duration in milliseconds required for digit detection. The value must be in increments of 5ms. Default = 25.

Frequency Range

N/A

Specifies frequency tolerances for digit detection. The value represents accept and reject ranges. Frequencies detected within the acceptable range will result in digit detection.

Frequencies detected outside the reject range will not result in digit detection.

  • Narrow
  • Medium (default)
  • Wide
  • Wider
Twist Cutoff

4 to 12 dB

Specifies the ratio of high group power to low. Twist ratios below the twist cutoff will result in digit detection. Twist ratios above the twist cutoff will result in digit rejection. Default = 8 dB.

This parameter applies to DTMF digit detection only.

Make the required changes and click Save.


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