The Eagle P139-HD Digital Audio System is the latest airborne Communication Management System, designed to reduce the communication workload in Law Enforcement, homeland Security, EMS and ENG operations. The Eagle P139-HD builds on EAGLE Avionics System's proven track record of modular audio systems by introducing the size, power and weight benefits of digital audio technology while retaining compatibility with the wide range of customizable digital control panels designed for any application. The Eagle P139-HD consists of a central Audio Router and a number of control heads communicating over the 4-wire GNET bus.