Comparison of five-party intercom Systems in various elevators

The mainstream five-party intercom systems for elevators in the market have the following five transmission modes

There are three types of wireless ones

The first FM radio frequency signal transmission mode

The second 4G network signal transmission mode

The third GSM signal transmission mode

There are two types of wired ones:

The first mode of IP network signal transmission

The second 485 wired signal transmission mode
The differences between the bus system and the branch line system of the five-party intercom in elevators

The main difference between bus-based five-party intercoms and wire-based five-party intercoms lies in the different wiring methods. The bus-based five-party intercom, as the name suggests, is a system where the connection lines of each elevator machine room are consolidated onto a single bus. The bus is directly connected to the adapter to the main unit, and only one line needs to be connected to the duty room to achieve communication.

The five-party intercom system with separate lines is directly connected to the main unit by the connection lines led out from each machine room. It is necessary to run multiple lines in parallel to the main unit in the duty room to achieve communication.