Ten Call Master Addon

The Aiphone LEF-10S supports up to 10 total stations that are intermixable with any number of masters and substations to maximum capacity. Incoming calls from a sub or door station are alerted with a momentary electronic mono-tone and an LED that remains lighted for approximately 20 seconds. Pressing the Call button enables you to talk and releasing it to listen. The person at the receiving station speaks hands free. This master station can be used to talk to any substation. Substations can call the master station but not each other.

This particular model does have a gate release.

If you use substations that just communicate back to the master then three-pair wiring can be used. If you need all master stations that can communicate with each other, then a 20 conductor cable is needed. Shielded wire is recommended to reduce the possibility of noise being picked up by the wires.

One PS-1225UL power supply is needed per entire system.