Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 23 COMMUNICATION The subsystem components that furnish a means of communicating within the aircraft, between the aircraft and other aircraft, and between the aircraft and ground stations. Includes voice, data continuous wave communicating components, passenger address systems, intercom, tape recorder-record player, etc. 00 GENERAL 10 LOW/VERY LOW FREQUENCY (LF/VLF) The portion of the system used for air-to-air and air-to-ground communications using LF/VLF carriers. Includes transmitters, receivers, power supply, control panel, antenna, antenna coupler, etc.
20 HIGH/VERY HIGH FREQUENCY (HF/VHF) The portion of the system used for air-to-air and air-to-ground communications using HF/VHF carriers. Includes transmitters, receivers, power supply, control panel, antenna, antenna coupler, etc. 30 ULTRA/SUPER/ EXTREMELY HIGH FREQUENCY (UHF/SHF/EHF) The portion of the system used for air-to-air and air-to-ground communication using UHF/SHF/EHF carriers. Includes transmitters, receivers, control panel, selective calling (SelCal) decoder, antenna, etc. 40 PASSENGER ADDRESS/ INTERPHONE The portion of the system used to address and entertain passengers and for communication by flight and ground personnel between areas of the aircraft.
Includes amplifiers, handsets, etc. Does not include the flight crew interphone system. 50 AUDIO INTEGRATING The portion of the system controlling the output of the communications and navigation receivers to the flight crew headphones and speakers, and the output of the flight crew microphones into the communications transmitters. Includes audio selector control panel, microphones, headphones, cockpit loudspeakers, etc. 60 STATIC DISCHARGING The portion of the system used to dissipate static electricity. Excludes static dischargers and suppressors mounted on the airframe, wing, or stabilizers included in the structures systems.
70 AUDIO AND VIDEO MONITORING The portion of the system that records or monitors flight crew or passenger conversation or movement, for security or safety purposes. Includes voice recorders, televisions, monitors, etc. 80 INTEGRATED AUTOMATIC TUNING The portion of the system that maintains integrated control of the operating frequencies of communication and navigation transmitters/receivers after either a manually inserted or pre-programmed integrated flight system command. Includes integrated frequency selector panels, digital frequency control computers, integrated frequency display panels, etc. 27