MIL-STD-188-154 Subsystem, Equipment, And Interface Standards For Common Long Haul And Tactical Telecommunications Control FacilitiesThis standard establishes physical and functional interface requirements for long haul and tactical telecommunications control facilities formerly technical control facilities in the Department of Defense DoD. As used in this standard, the term telecommunications control facility TCF includes patch and test facilities PTFs and interfaces to locations that provide centralized monitoring and control functions for other telecommunication locations.

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MIL-STD-188-154A

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expansion capability (see paragraph 4.2.3). Electrical power shall be provided at all voltages necessary, and, when required, shall support separate RED and BLACK systems. The equipment comprising the critical technical load within the facility shall be supplied with no-break power sufficient to maintain operation for at least 60 minutes in manned facilities and at least 8 hours at unmanned locations. Certain equipment with critical power requirements in excess of these times may be equipped with separate uninterruptible power supplies. Tactical TCFs are not required to meet these no-break power standards but shall have

as much battery backup as weight and space constraints allow. When storage batteries of the acid or alkaline electrolyte type are employed, the provisions of ANSI C2-1997 shall be followed.

5. DETAILED REQUIREMENTS

5.1 General. This section contains detailed installation requirements for subsystems, equipment, and communications interfaces in TCFs.

5.1.1 Automation. There shall be a centralized TCF for connection to long haul media, but, this also may be controlled from the central control facility. As facilities continue to change to modern automated systems, telecommunica- tions control concepts will become more integrated with the network manage- ment functions described in paragraph 4.1.2.3.

5.1.2 Access points. The TCF shall employ specific digital and analog access points throughout the circuit path to permit routing, testing, and monitor- ing functions. These access points shall be grouped by the function to be performed. As a design objective, patch panels should only be used when there are no other means available. Figures in this section that refer to integrated access points are referring to those access points that are part of the automated equipment but not necessarily physically accessible.

5.2 System interoperability. The TCF is the primary location for interfacing between communications systems. The capability for interoperating different systems may be required for alternate routing or extending communications circuits.

5.2.1 System interconnections. TCFs serving as system interconnect points shall be able to provide physical and electrical conditioning to ensure proper interface among the systems being connected. This conditioning shall be accomplished so that the circuit parameters resulting from the interconnection

will conform to the established standards of the connected system.

5.2.2 Interfacing methods. Systems will normally be interfaced at the circuit or bit-stream level.

5.2.2.1 Digital circuit interfacing. Digital circuit interfacing may require protocol and interface converters (e.g., unbalanced to balanced interfaces). This equipment shall be located as close to the source of the nonstandard