What is relay room

Actually relay room is air conditioned indoor system, in which rail track All signaling cables are terminated from it, and connected to the Assistant Station Manager (ASM) panel to give a clear picture of the track to operate the room. The relay room has two separate locks, the key of one is with the ASM, while the other is with the Signal and Telecommunication (S&T) team. If there is a fault in the signal, then the Electronic Signal Maintainer (ESM) gives a disconnection memo to the ASM and opens the relay room to rectify the fault.