Foxcom Satlight 7870 is a complete interfacility fiber link. The total package consists of a hub with two transmit/receive modules plus two separate remotes, each containing its own transmit and receive module.
This model is designed to carry 70/140 Mhz over a distance of up to 45 km. Although most users have no need of the long distance transport, even in shorter runs fiber is preferred over copper because it is immune to lightning strikes.
The Foxcom Satlight 7870 is the main hub with slots to accommodate four separate remotes. Each remote takes two components, a transmit module (7830DT) and a receive module (7830DR)- the hub also has redundant power supplies installed.