Abstract: A communication system for use in a mine to provide two-way communication between a conveyance which moves in a mine and a communication network located in the mine. The system comprising: means for producing a signal indicative of the location of the conveyance in the mine; a plurality of repeaters situated in the mine and being coupled to the communication network; and a controller for controlling the repeaters and the controller being responsive to the signal and having means for activating the repeater which is proximate to the conveyance so that a communication link is provided between the conveyance and the communication network.