The DSI can operate in two separate modes: Day Service and Night
Service. This section of the User Guide describes Night Service.
When the DSI is set to Night Service, the DSI rings and the auxiliary
equipment is activated when any LCD on the MBS or add-on module
flashes. For Night Service, the auxiliary equipment is commonly a loud
ringer.
You cannot set any options for Night Service, it always works the same
way. Day Service features do not operate when the DSI is switched to
Night Service.
The following table indicates how the LED on the DSI shows whether the
DSI is switched to Night Service or Day Service.
Mode DSI's LED Signal
Night Service Flashing
Day Service - DSI on Constantly on
DSI off Slow blink
Switching to Night Service
Action
Step 1: Press then press
The DSI sounds three single tones and its LED flashes.
Switching back to Day Service
Action
Step 1: Press then press
The DSI sounds three single tones.
35
Operating Night
Service
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