AT&T Door Phone Controller - Manual (Page 30)

AT&T DOOR PHONE CONTROLLER
BACK PANEL
AT&T DOOR SPEAKER
AND DOOR BELL
B U T T O N
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