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AT&T DOOR PHONE
CONTROLLER BACK PANEL
TERMINAL BLOCK “HARD
WIRE” CONNECTOR
NOT USED
TO DOOR SPEAKER
TO DOOR BELL BUTTON
TO DOOR AJAR SWITCH
TRUNK PORT
STATION
PORT
TO C.O.
TRUNK PORT
NOTE: For Ground Start installations
see Figure 4-2b.
TO REMOTE DOOR OPEN SWITCH
OPTIONAL
TO DOOR STRIKE PLATE DEVICE
TO AUXILIARY ALERT DEVICE (DOOR BELL/CHIME)
TELEPHONE SYSTEM
TO C.O. TRUNK PORT
STATION
PORT
Figure 4-2a. Connecting Door Phone Controller to Standard Telephone Equipment
4-4 Installation - Dedicated Trunk Port