Videx 3161 2 Button Audiophone

3000 Series telephone for VX2200 system which uses a 2 wire common bus for audio installations. Wall-mounted white telephone with call tone input, 3 position volume control, lock release button and spare dry contact button for the basic VX2200 system. The handset is made from ABS plastic which has impact resistance for a higher quality. Privacy of call - users can enable or disable incoming calls, enabling do not disturb when required Privacy of speech - the phone becomes disabled if the telephone is not in use Door open signalling - LED indication of door status (to use this service, an additional wire is required from a door contact to the intercom.)