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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d. Long range plans.

e. In the absence of determinable factors, use 25% as the factor for growth in floor space, frame space, utilities, and station battery, up to the total transmission media capacity entering or exiting the facility.

4.2.3.2 Standbys. Manual or automated access, circuit conditioning, interfacing, and ancillary equipments shall be furnished and installed to:

a. Allow for the substitution of units that are out of service because of facility test and maintenance. Proportions of standbys for this purpose shall be based on the quantity of station equipment and the schedule for test and maintenance.

b. Allow for the substitution of equipment strings (circuit or wideband segments) as they occur between patch panel appearances. Because such equipment shall be used to replace strings of equipment, numbers are not to be calculated on a per unit basis for this requirement. Long haul TCFs shall be so wired and equipped that there shall be at least one standby string for every 10 strings (or portions thereof) of the same configuration, with a minimum of two standby strings of each configuration that has at least three strings.

4.2.4 Grounding, bonding, and shielding. The construction of the facility ground system shall comply with the approved grounding, bonding, and

shielding methods and techniques. Guidance for grounding, bonding, and shielding may be found in MIL-HDBK-419.

4.2.5 Electromagnetic compatibility. Electromagnetic compatibility and interference control shall be considered in all stages of TCF design. New systems, subsystems, and equipment procured for use in TCFs shall satisfy the applicable requirements of MIL-STD-461.

4.2.7 Equipment interfaces. Equipment items or systems within a TCF shall have a common interface to meet restoration and rerouting criteria. Interface standards for common requirements have been developed by several organizations. These include TIA/EIA-530-A, TIA/EIA-422, TIA/EIA-433, ITU- TSS V.35, or MIL-STD-188-114A. Within a facility, common interface standards shall be selected for each patching application. When specific equipment items or transmission media interfaces must be used, converters shall be installed to keep all physical patching identical within the facility.

4.2.8 Station power. The TCF shall be provided with a power generating source, an auxiliary power source, and a power distribution system to accommodate technical and non-technical requirements. All electrical power subsystem installations shall adhere to NFPA-70, National Electrical Code, and applicable regulations imposed by host nation or local authority. The TCF shall be provided with sufficient AC and DC power sources, both in quantity and capacity, to satisfy all power requirements for installed equipments and planned