AT&T 75 - Station Circuit Distribution from Equipment Room

66-TYPE HARDWARE
type connecting blocks in the satellite closet blue field that terminate 4-pair station circuits
to the information outlet. The 66-type connecting blocks that can be used in the satellite
closet are the 66M1-50, 157B, and 154A-type mounting.
Station Circuit Distribution From Equipment Room
The following information should be helpful in explaining the station circuit distribution
from the equipment room to the information outlets for new wiring installations. Diagrams
are provided to show the options for running and connecting the station cables.
If most of the voice terminals that require remote powering are within 250 feet (76.2 m) of
the equipment room, 4-pair station circuits are run from the equipment room to the
information outlets. If this is not the case or if the customer requires 2-point
administration, 3-pair station circuits are run to satellite locations. From the satellite
locations, 4-pair station circuits are run to the information outlets.
4-Pair Station Circuits
Four-pair circuits can be run directly from an equipment room cross-connect field to a 258A
or BR2580A adapter as shown in Figure 4-40. Four-pair station cables (DIW) connect the
adapter to the information outlets.
The 4-pair DIW station cables can be run directly from the equipment room to the
information outlets if 4-pair station circuits are used in the Distribution Field (see Figure
4-41). The station cables must be punched-down on the 66-type connecting blocks.
4-64