This system is used for point to point communication between Station Master & Cabin ASM of a yard/ Level Crossing gate, Cabin ASM & Station Master/Level Crossing gate, Level Crossing gate & Cabin ASM/Station Master, Level Crossing gate & Level crossing gate, cabin ASM & cabin ASM etc. where the number of points to be connected are 2 to 11. It shall also be used as an intercom wherever 2 to 11 parties will be required to be connected for communication on 2 wire line.