Merlin 3070 Service And Maintenance Manual page 133

(452A-50) EXTRA-ALERT CONTROL SWITCH (32630)
This switch provides ON/OFF control, and is required for the proper installation of certain
older extra-alert devices.
170A
CARTRIDGE
(TYPE III)
INSTALLATION
Insert one end of a D4CH Modular Line Cord into the OUT jack of the 452A-50 Switch
1.
and the opposite plug end into an extra-alert device or other appropriate apparatus (e.g.,
relay box, bell, horn, etc.).
2. Remove the plastic hole plug from the "Extra-Alert" jack on the 170A or (Type III)
Cartridge and plug one of the modular cords (D4CH) into the "Extra-Alert" jack.
3. Insert one plug end of a second D4CH Modular Line Cord into the IN jack of the
452A-50 Switch and the opposite plug end into the "Extra-Alert" jack of the 170A or
Cartridge (Type III).
Attach the 452A-50 Switch to the wall.
4.
Place the switch in the ON position. (Your extra-alert device will now sound each time
5.
you receive a call from outside your system.)
Equipment manufactured by AT&T Technologies in the U.S.A.
CONTROL UNIT
EXTRA-
ALERT
JACK
TO EXTRA-ALERT
BELL OR HORN
D4CH
MODULAR
LINE
CORDS
CIB 2893
453A-50
CONTROL
SWITCH
(ENLARGED
EXAMPLE)