term1 Definition1term2 Definition2term3 Definition3
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Administration addresses the needs of premistes served by a single ER. The ER is the only telecommunications space administered but there are no TRs, backbone cabling or OSP cabling systems to administer.
Class 1 3-17
Administration addresses infrastructure with one or more telecommunication spaces in a single building.
Class 2 3-17
Administration addresses infrastructure with multiple buildings at a single site (campus environment)
Class 3 3-17
Administration addresses infrastruscture with multiple sites or campusses.
Class 4 3-17
Demarcation point (AP/SP central office connections)
Orange 3-18
Network connections (Network, auxiliary equipment)
Green 3-18
Common equipment (connections to PBX, mainframe computer, LAN, multiplexer)
Purple 3-18
First-level backbone (termination of building backbone cable connecting MC (CD) to ICs (FDs)
White 3-18
Second-level backbone (termination of building backbone cable connecting ICs (BD) to HCs (FCs)
Gray 3-18
Horizontal Cable (horizontal connections to telecommunications outlet/connectors, formerly referred to as "station calbe")
Blue 3-18
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