13.3 PBX Configuration—[5-3] OptionalDevice—Voice Message13.3.1 PBX Configuration—[5-3-1] Optional Device—VoiceMessage—DISA SystemDirect Inward System Access (DISA) enables outside callers to access specific PBX features as if the callerwere using an SLT extension of the PBX.For more information on DISA, see "2.16.1 Direct Inward System Access (DISA)" in the Feature Guide.Option 1DISA Security—DISA Security ModeSelects the DISA security mode to prevent unauthorised access to the PBX. In Trunk or All Security mode, thecaller is required to override security by Walking COS or Verification Code Entry in order to enable the restrictedfeature temporarily.Value RangeNone: Intercom calls, TIE line calls, and trunk calls can be made.Trunk: Intercom calls and TIE line calls without PBX code can be made. TIE line calls with PBX code and trunkcalls are restricted.All: All calls are restricted.Feature Guide References2.7.5 Walking COS2.7.6 Verification Code EntryDISA Security—Remote Walking COS through DISA without PIN (Activation KeyRequired)Enables registered caller ID numbers to be automatically recognised as PBX extensions when calling throughDISA, and to use the Walking COS features without entering a PIN.Value RangeDisable, Enable (Get DISA)DISA Intercept—Intercept when destination through DISA sets DNDSelects how DISA calls are handled if the destination sets DND, and disables Idle Extension Hunting.Value RangeBusy Tone, Enable, Busy MessageDISA Intercept—Intercept when all DISA ports are busySelects how DISA calls are handled if all DISA ports are currently in use.648 PC Programming Manual13.3.1 PBX Configuration—[5-3-1] Optional Device—Voice Message—DISA System
