Elevator 3 party intercom, no repeater can connect how many meters
In fact, more than 95% of all through the line does not matter, but a party a phone call, the five party call is not easy to use, you go or not?. There's no problem checking the line. The elevator says he has no problem with the equipment. Depressed!!
Now I have 5 party calls to the elevator and its headache, elevator do not understand the call equipment, equipment parameters do not provide, and rotten problems are much more prepared, wearing hundreds of meters, a fault, but also to find the wiring of the line.
Depends on what kind of machine you are, the old 4~6 core line of transmission is relatively far, I have done 200 meters or so, the new 2 core in the case of external auxiliary power supply, the most done 300 meters
