IDM Elevator Five-party Intercom Signal Aggregation Terminal
The Mitsubishi Analog Five-party Intercom System (Old Model) and the Mitsubishi Digital Five-party Intercom System (New Model) both use 24V power supply and signal transmission to achieve longer-distance transmission over twisted pair cables. Nowadays, twisted pair cables in residential communities are increasingly being replaced by fiber optics. However, the output signal voltage of optical terminals is generally 3–5V, which weakens the line-connection capability at the central office, affecting the number of remote units that can be supported. The IDM Elevator Five-party Intercom Signal Aggregation Terminal is designed to condition the output signal from optical terminals to meet the central office's line-connection management requirements. A single board can aggregate up to 8 intercom signals, and multiple boards can be cascaded to achieve aggregation of 16 or 24 signals. At remote sites with suitable conditions, remote signal conditioning equipment can be used to combine the intercom lines from up to four elevators before connecting them to the optical terminal for transmission.
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