AT&T 75 Wiring Manual page 313

110-TYPE HARDWARE
Figure 3-71. 4-Pair Single Modular Plug-Ended Station Cable
Figure 3-72. Example of Extending 4-Pair Station Cables
Closets
Site Locations
The site locations are closets that provide a point in the station wiring for the
administration of remote powering. Adapters are used at site locations to terminate the 25-
pair station cables and provide connection points (modular jacks) for power adapters and 4-
pair station cables.
258A AND BR2580A ADAPTERS
The 258A and BR2580A adapters (Figure 3-73) plug into a 25-pair female cable connector.
These adapters divide the 25-pairs of leads on the cable into six individual 4-pair (modular
jack) circuits. Remote powering is accomplished using a 400B2 adapter. (See ADJUNCT
POWERING section for details.)
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