Configuring Hook Flash

The following procedure describes how to configure various hook-flash features.

To configure hook-flash features:
1. Configure the digit pattern used by the Tel side to indicate a hook-flash event:
a. Open the Supplementary Services Settings page (Setup menu > Signaling & Media tab > Gateway folder > DTMF & Supplementary > Supplementary Services Settings).
b. In the 'Hook-Flash Code' (HookFlashCode) field, enter the digit pattern.

c. Click Apply.
2. Configure the hook-flash transport type:
a. Open the DTMF & Dialing page (Setup menu > Signaling & Media tab > Gateway folder > DTMF & Supplementary > DTMF & Dialing).
b. From the 'Hook-Flash Option' (HookFlashOption) drop-down list, select the required transport type.

c. Click Apply.
3. To configure the period by the device for detecting hook-flash initiated by analog interfaces:
a. Open the Analog Settings page (Setup menu > Signaling & Media tab > Gateway folder > Analog Gateway > Analog Settings).
b. Configure the following:
'Min. Hook-Flash Detection Period' (MinFlashHookTime): Defines the minimum time (in msec) for detection of a hook-flash event from an FXS interface. Detection is guaranteed for hook-flash periods of at least 60 msec (when configuring the period to 25). The device ignores hook-flash signals lasting a shorter period of time.
'Max. Flash-Hook Detection Period' (FlashHookPeriod): Defines the maximum hook-flash period (in msec) for Tel and IP sides for FXS and FXO interfaces. For more information, see the Tel Profile parameter 'Flash Hook Period' in Configuring Tel Profiles.

a. Click Apply.