
PAGE 7 of 29 SENTRY TECHNICAL MANUAL VER1.6
AUDIO TELEPHONES
Art.3121
Art.3123
The Art.3121 includes a three position call tone volume control, lock
release push button and spare dry contact push to make button for
other services.
CONNECTIONS:-
Function
1 Transmit speech to the door panel
2 Receive speech from the door panel
T Call tone in from Sentry PCB
P Switch 0V lock trigger command
- 0V
C Select line (Switches on telephone)
8 Dry contact switch
9
The Art.3123 includes a three position call tone volume control, lock
release push button and spare dry contact push to make button for
other services. Additionally it includes a slide mute switch with LED to
turn the phone off when the tenant does not want to be disturbed.
CONNECTIONS:-
Function
1 Transmit speech to the door panel
2 Receive speech from the door panel
T Call tone in from Sentry PCB
P Switch 0V lock trigger command
- Not Used
C Select line (Switches on telephone)
8 Dry contact switch
9
SWITCH PCB
- 0V
+/~ +12V for mute LED
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