AT&T Door Phone Controller Installation And Operation Manual page 52

TO AT&T DOOR PHONE CONTROLLER
J1 CONNECTORS
Figure 4-2b. Ground Start Installations
TO C.O.
NOTE: For Ground Start installations:
Connect the green wire to Tip
and the red wire to Ring.
TO "SHIELD" TERMINAL (12) ON AT&T
DOOR PHO NE CONTROLLER
TELEPHONE SYSTEM
GROUND TERMINAL
TRUNK PORT STATION
PORT
TRUNK PORT
STATION
TRUNK PORT
PORT
TELEPHONE SYSTEM
Installation - Dedicated Trunk Port 4-5