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Protection of Communications | Up
Information Systems Technician Training Series, Module 1 - Administration and Security | Next
Restricted Data and Formerly Restricted Data |
TELECOMMUNICATIONS SERVICE
REQUEST (TSR)
When a command requires additions, deletions, or
changes in existing Defense Communications System
(DCS) circuits, it must initiate a TSR. The submission
of a TSR is not a simple process and requires research
and planning. The Defense Information Systems
Agency (DISA) publishes a publication called
Submission of Telecommunications Service Request,
DISA CIRCULAR 310-130-1, that provides
instructions for preparing and submitting TSRs. New,
increased, or updated services are expensive and require
substantial justification.
The increasingly high cost of telecommunications
support, especially leased services, has resulted in the
high visibility of communications programs at all levels
of government. This fact underscores the need for
managerial awareness and improved life cycle
documentation of telecommunications resources.
Planning and developing a responsive naval
telecommunications system requires early
identification and consideration of user requirements.
Programming is required to obtain necessary resources.
Normally, these requirements should be defined and
submitted at least 2 years in advance to permit timely
system planning and programming.
TELECOMMUNICATIONS SERVICE
ORDER (TSO)
The TSO is the authorization to start, change, or
discontinue circuits, trunks, links, or systems. It is used
to amend previously issued TSOs and to effect
administrative changes.
The basic circuit design information for all new or
changed circuits will be provided by the TSO. The TSO
may also be used as the authority to procure specific
devices and ancillary equipment necessary to install the
circuit or services designated.
FREQUENCY MANAGEMENT
Over the last quarter century, electronics has
pervaded virtually every facet of our life. High-tech
electronic devices, especially those that radiate, make
constant use of the electromagnetic spectrum.
The term “electromagnetic spectrum” refers to the
natural vibrations that occur when a force is applied to
a substance. These vibrations occur with various
speeds and intensities. The speed at which they occur
is called frequency, and the distance between each
vibration is called wavelength. Frequency and
wavelengths are discussed in a later module.
Spectrum Management
A great invention in the 19th century ultimately led
to the need for spectrum, or frequency, management.
This invention was the wireless or, as we know it today,
the radio. At first, there were only two radio
frequencies—50 kilohertz (kHz) and 1000 kHz. Today,
the spectrum is recognized by international treaty to
extend up to 3000 gigahertz (GHz). The development
of radar, satellites, and other technologically advanced
systems and their subsequent demands on the frequency
spectrum have contributed to the need for frequency
management.
Frequency Allocation
The Department of the Navy will obligate no funds
for equipment until a frequency allocation has been
obtained. This means that all actions necessary to
establish a frequency band for a specific item must be
completed and approved prior to budgeting funds.
The allocation approval authority considers the
type of service the item will provide and the
classification of the emission. This authority also
enforces rules and regulations and compliance with
technical standards. The approval authority also
ensures the compatibility of emerging equipment with
other equipment operating in the same electromagnetic
environment.
Interservice frequency coordination is another
important consideration. It reduces the potential for
harmful inteference if more than one service develops
similar items that will operate in the same band. The
coordination is the responsibility of the Chief of Naval
Operations (CNO), working through the United States
Military Communications Electronics Board
(USMCEB).
Frequency Assignment
Frequency assignment is the process of authorizing
a system or equipment to operate on a discrete
frequency (or frequencies) and within a specified set of
constraints. Examples of constraints are power,
emission bandwidth, location of antennas, and
operating time.
Authority for using radio frequencies by Navy and
Marine Corps activities within the United States and
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