NEC 922450 Analog Door Chime Box

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"NEC 922450 Brand New Includes Two Year Warranty, The NEC 922450 is the analog door box which is self-contained intercom unit typically used to monitor an entrance door. A visitor at the door can press the door box call button. The door box then sends chime tones to all extensions programmed to receive chimes. To answer the chime, the called extension user just lifts the handset. This lets the extension user talk to the visitor at the door box. 922450 Features: Analog Door Chime Box, Requires 2PGDAD Module connected to DSX Digital Station, For DSX 80 & DSX 160"

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