The intrinsically safe connections LISA are particularly intended for providing of analogue signals transmission between the subscribers' equipment of telephone exchange of any type, and the analogue telephone sets of regular and industrial types (e.g. TPN-S) working in the decade system or DTMF, and the incoming repeaters of the direct current of the cooperating telephone exchange, as well as with the analogue modems. It makes possible the setting of subscriber's connection, or inter-exchange and modem connections in the intrinsically safe underground telecommunication cables, through the excavations of methane mines, between various shafts. It enables the connection through the underground cables between surface facilities of one mine or the mines which are connected together.

CooperationWith all types of subscribers' telephone exchanges, telephone sets and analogue modems.

Capacity

For the basic set: 15 intrinsically safe subscribers' connections, inter-exchange or modem connections, with the possibility of further development up to n x 16 NN.

Buffer - 48V DC

SSI-MINI racks consisting of: