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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

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

SWITCH PCB

- 0V

+/~ +12V for mute LED

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Videx SENTRY Manuale Utente Pagina 9