48(48)
Date
Rev
Documentnumber
Prepared
Doc respons/Approved
Checked
Reference
1999-07-15
A
1531-BDV BS 101 05 Uen
INSTALLATION INSTRUCTION
Subject responsible
11
INSTALLATION OF ALARM INTERFACE UNIT
The ALARM INTERFACE UNIT is an optional equipment mounted in the case bottom of the DBC 21x telephones.
This equipment is used in the hospitality area to enable distress notification from e.g. a bathroom. A normally closed
switch is installed and the two terminals are connected to the pins (button a and button b) on the option unit. The con-
nection can be made in the wall outlet. Then the wiring shown above applies. If another type of wiring is used the
connector Optional alarm can be used.
Line to exchange
line to exchange
a b
nc ba
bb nc
ba and bb are the
connectors to the
alarm button
nc are not used wires
a
a
Line/Alarm
Line out
Optional Alarm
Pin Description
Pin Description
Pin Description
1
not used
2
button a
3
a
4
b
5
button b
6
not used
1
not used
2
a
3
b
4
not used
1
button a
2
not used
3
not used
4
button b
1
1
connect to the line input on the telephone
1
4-pin
wall outlet
DBY BS 410 01/1
RPM BS 130 002/01
(to wall outlet)
(to telephone)
modular jack
4-pin
modular jack
6-pin
modular jack