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Tunnel Communication System

Part

Telephones, a fiber-optic data link to the surface and radio coverage along the tunnel, so the crew, the supply trains and the surface can talk and boring data reaches the office.

Class	Part

Telephones, a fiber-optic data link to the surface and radio coverage along the tunnel, so the crew, the supply trains and the surface can talk and boring data reaches the office. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.