The elevator intercom system is mainly composed of the connection lines such as the management host, cage extension, machine room extension, etc., and can also be equipped with relay boxes, monitoring statistical software and hub boxes to make the system to achieve the call of three or more parties, which belongs to a series of security intercom industry.

As the name suggests, is a dedicated elevator car, elevator control room, management center between the intercom. Can achieve three or even five calls, belongs to the security intercom industry a series.

According to the elevator inspection regulation, in the inspection report 4.8 (emergency lighting and alarm device), emergency alarm device adopts the intercom to contact the rescue service continued, emergency alarm device of the emergency lighting power supply of the power supply from mentioned in the preceding article (normal lighting power interruption, automatically turn on the emergency lighting power supply), or equivalent sources; After activating the intercom system, the trapped passengers do not have to do anything else.

It can be understood that: when passengers in any emergency situation (including power failure), as long as the passengers in the car to start the intercom system, should be able to get in touch with the outside world. In this way, there is a variety of intercom systems used to get in contact with the outside world, mainly divided into two types: wired intercom and wireless intercom, wired intercom is divided into two categories, using the lift intercom and external telecommunications telephone, wireless intercom has also adopted duplex signal and using GSM mobile network, no matter adopt what kind of pattern, as long as in the case of an emergency, can get in touch with the outside world, capsules are can achieve inspection standards.

It is mainly composed of elevator intercom host (management center host), cage extension, machine room extension. In addition, there are lightning protection, relay box, decoding board and other related equipment.