HelixNet Partyline on September 29, 2015 | Marketing Team The HMS-4X HelixNet Main Station provides power and networked channels of audio to support up to 20 digital beltpacks. The sleek 1RU digital system can be mounted into any standard 19" rack. HelixNet Main Stations accept linking as well as two-wire and four-wire optional interface modules, offering seamless connectivity to LAN and virtually all common two-wire and four-wire audio systems. Delivering superb digital sound quality, the two-channel HBP-2X HelixNet Beltpack enables access to two of any four system channels over a single cable. The rugged, ergonomically designed HelixNet Beltpack was created to perform on the big stage, offering reliability and durability that will withstand the most demanding production environments. Use our Digital Partyline Calculator to calculate the maximum acceptable cable length for a Clear-Com Digital Partyline System.