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AT&T DOOR PHONE CONTROLLER
BACK PANEL
AT&T DOOR SPEAKER
AND DOOR BELL
BUTTON
SHIELDED, TWISTED PAIR, 24 AWG.
APPROX. 1500 FT. MAXIMUM LENGTH
JUMPER THE TWO DOOR AJAR SWITCH TERMINALS
IF DOOR AJAR DEVICE IS NOT USED
DOOR AJAR SWITCH
NOTE: MAGNETIC SWITCH
IS CLOSED WHEN DOOR
IS CLOSED
Figure 2-4. Connections for AT&T Door Phone Speaker, Door Button and Door
Ajar Devices
2-14 Installation Procedures