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APPLICATION NOTES
NIGHT BELL
There are two different Night Bell connections possible to the Controller. These are illustrated in
Figure 20.
From an EKTS Telephone System
A programmer needs to know what type of Night Bell connection exists between the telephone system
and the Controller. In one case, typically with an EKTS (Key) telephone system, where Night Bell input is
wired to one of the eight Controller onboard zones (corresponding to the eight switches on the rear of the
controller), then you will need to configure it as an input zone, just as any other (i.e.,door bell, alarm sys-
tem, door ajar). The phone system produces a contact closure.
Required Programming: Type of Zone, step 17, Tone Selection, step 27, and Tone Routing, step 28.
From a PBX or Centrex System
In the other case, typically with a PBX system that produces a ring voltage output, the Night Bell connec-
tion is not wired to one of the eight input zones, but to the connector on the rear of the Controller labeled
"N.B." (pins 5 and 6, nightbell).
Required Programming: Night Bell Enable, step 25.
Figure 20.
Night Bell Interfaces
DOOR AND SPEAKER CONTROL
Visitor Presses Doorbell
Figure 21 illustrates door speaker and control interfaces.
When a visitor presses the doorbell of a security door, a contact-closure input to the controller signals an
output tone (i.e., a door chime) to selected paging zone(s).
Required Programming: Type of Zone, step 17 (doorbell as an input zone), Tone Selection, step 27
(select a tone to be sounded when the doorbell input is activated), Tone Routing, step 28 (route the tone
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