Weighing 3.2 kg, FXS/MODEM Tactical Telephone is waterproof and protected from extreme weather conditions, vibrations, and ballistic shocks (Mil-STD compliant). In FXS mode, unit works at distances up to 20 km with 7 mA min loop current. In Modem mode, unit transmits full-duplex and data rates of up to 5.7 Mbps over 2 wires. Universally usable field phone operates even when separated by extended distances, and connections are also supported to handsets/speakers/computer.