terminals can communicate with any other MILSTAR terminals, whether located within the same theater of
operations or not. Different protocols, however, will be required for in-theater and out-of-theater
communications. For network identification and TRANSEC key management, all AN/TSC-124 terminals
operating within the Army spotbeam footprint on each satellite will make up a network. Therefore, separate
nets are unnecessary. However, partitions may be formed by selecting and distributing different COMSEC keys
and addresses to the users; for example, distributing like keys to those users who want to operate together to the
exclusion of others. The discrete addresses would then be furnished in a format similar to the telephone books
now employed. Terminal-to-terminal connectivity would remain possible, with end-to-end communications
being possible only if like COMSEC keys are employed at each I/O device.
2. System characteristics.
a. The AN/TSC-124 will consist of the terminal, prime mover, antenna, and trailer-mounted power
generator. The AN/TSC-124 will be installed in one S-250 or equivalent shelter. It will be transported under
tactical conditions by a standard 4-ton truck. A 3-kilowatt generator will be mounted on a standard 3/4-ton
trailer that will be towed by the prime mover. Backup power will be provided by an under-hood power plant
installed on the vehicle.
b. The terminal can communicate at the halt; communicating while moving is a planned improvement that
will come with fixture technology. Terminal setup and teardown times will not exceed 30 minutes by a team of
three military occupational specialty (MOS) 31C soldiers.
c. Critical, operator-replaceable spares will be carried to enhance system survivability and ensure rapid
repair and return to service. Additionally, crew, crew weapons, personal bags and equipment, camouflage
netting, tents, and the like will be carried on the vehicle or in the terminal. C130/C141/short takeoff and
landing (STOL) aircraft roll-on/roll-off with no preparation is possible.
d. The terminal will be able to accept up to four individual user inputs of data or voice at rates of 75 bp/s to
2.4 kbp/s by using user-controlled interface devices (UCIDs). The devices can be remoted 2,500 feet (758
meters) from the terminal using conventional field wire. Four DR-8s, modified to accept and dispense WF-16
field wire, will be provided with the terminal. The DR-8s will provide a minimum remoting capability
independent of customer field wire resources.
e. Compatibility with the MILSTAR standard I/O and COMSEC devices (for data, the AN/UGC-74 and
KG-84; for voice, the ANDVT) a well as the single subscriber terminal (SST), lightweight digital facsimile, and
the Army Command and Control System (ACCS) hardware is provided. Each terminal will be furnished with
one AN/UGC-74 and one ANDVT for operator use.
f. It will be hardened to the effects of EMP/high altitude EMP (HEMP) and will operate in EW/NBC
environments.
SS0031
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