Installation guide

CIB 2893

(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.

TO EXTRA-ALERT

BELL OR HORN

CONTROL UNIT

D4CH

MODULAR

LINE

CORDS

453A-50

CONTROL

SWITCH

170A

(ENLARGED

CARTRIDGE

EXAMPLE)

(TYPE III)

EXTRA-

ALERT

JACK

INSTALLATION

Insert one end of a D4CH Modular Line Cord into the OUT jack of the 452A-50 Switch

and the opposite plug end into an extra-alert device or other appropriate apparatus (e.g.,

relay box, bell, horn, etc.).

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.

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.

Place the switch in the ON position. (Your extra-alert device will now sound each time

you receive a call from outside your system.)

Equipment manufactured by AT&T Technologies in the U.S.A.