Bus technology protected against polarity reversal. All information between the door station and the telephone is exchanged via two lines. The wiring can be done with up to two risers, so that inspection and maintenance work on one riser does not affect the rest of the system. Up to 8 different ring tones, both for the door call and for the floor call. Product features: Telephone interface for connection to the PBX. Connection of the door station. PBX or external telephone connection. (e.g. cell phone) easy programming on an extension phone door opener function on the phone via key combination up to 50 call buttons / phone numbersTechnical data:Compatible with system BiBusInterface a/b analog (according to FTZ 1TR 110), DTMF dialing method for DIN rail mountingWidth: 6 sub-units (108mm) Supply voltage: 230V (AC)Installation note:Note:
