The HLI-FBS fiber linking module provides a daisy-chain fiber interface to connect to other HelixNet main stations. With Ethernet modules, stations share party line channels and program audio and makes available to any station and beltpack on the linked system. Fiber modules can be mixed with Ethernet modules in the same network. HelixNet main stations accepts linking as well as two-wire and four-wire optional interface modules, offers seamless connectivity to LAN and virtually all common two-wire and four-wire audio systems.