New Units Round Out Digital Partyline Range (Alameda, United States--March 26, 2014) Clear-Com® has announced the launch of three new product units that add significant flexibility and functionality to its HelixNet™ Partyline Intercom System. The new units - HRM-4X Remote Station, HKB-2X Speaker Station and S-Mount - extend the digital product range by allowing many more stations to be added to the system.