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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32

MIL-STD-188-154A

w/CHANGE 1

5.5.7 Monitoring equipment. TCFs shall be provided the capability to monitor installed circuits. Facilities with analog circuits shall be provided with an audio amplifier and analog speaker assembly. These shall be rack mounted with the input terminated on the miscellaneous patch panel. Those facilities having clear text digital data circuits installed shall have equipment available to monitor these circuits. This equipment can be any appropriate combination of protocol analyzers with data capture capability, computer terminals, or printers. The monitoring devices shall be configured for low-level operation, capable of

printing or displaying several pages, and be able to operate at all provided service data speeds. The inputs shall be terminated on the miscellaneous patch panel serving the digital circuits.

5.5.8 Testing. Provisions shall be made to allow circuit testing as outlined in DISAC 310-70-1 and DISAC 300-175-9. Traditionally, it was necessary to physically access each circuit for testing at each local facility. Modern automated equipment allows for built-in-service diagnostic capabilities and remotely controlled automated testing, often without interrupting user service.

5.5.8.1 Remote access testing. Remote access testing, particularly

when coupled with automated circuit rerouting, is the preferred method for circuit testing. Testing shall be controlled from a central location (e.g., a Network Management Center (NMC) or FCO). All required network management

systems and control channels shall be wired to the central location. If required, non-integral test equipment shall be wired to designated test ports of the equipment under test.

5.5.8.2 Local access testing. The preferred method of local access testing for manned facilities is through a centralized Quality Control Test Center (QCTC) containing all equipment and patching capabilities for circuit testing. Interbay trunks shall connect the QCTC to all appropriate patch bays and to the test circuit outputs of all switches. Duplicate items of test equipment or test equipment used only in one area may be mounted in the same cabinets with the patch bays. When floor space or operational considerations do not allow a QCTC to be installed, portable test equipment shall be used for circuit testing. Unmanned facilities will normally be tested using portable equipment carried by the visiting maintenance team.

5.5.9 Interbay trunks and additional access points.

5.5.9.1 Interbay trunks. Interbay trunks shall be provided, as required, for rerouting, restoring, and equipment patching requirements. These interbay trunks will connect those physical patch panels providing a like service (e.g., all

64 kbps media access panels). Additionally, in facilities using a QCTC, interbays shall be provided to connect the QCTC to all appropriate patch bays. The interbay trunks shall be positioned so that no patch will require a patch cord longer than six feet.