Station Circuit Distribution From Equipment Room; 4-Pair Station Circuits; 3-Pair To 4-Pair Station Circuits - AT&T 75 Wiring Manual

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 using
Z100A1 connector modules to a 258A or BR2580A adapter as shown in Figure 2-59. Four-
pair station cables (DIW) connect the adapter to the information outlets.
Figure 2-59. 4-Pair Circuit Distribution and Connectivity from Equipment Room
Cross-Connect Field Using Z100A1 Connector Modules

3-Pair to 4-Pair Station Circuits

Figure 2-60 shows the 3-pair circuit distribution from an equipment room cross-connect field
using Z100B1 connector modules to a satellite location using Z100A1 connector modules.
Four-pair circuits are distributed from the satellite location to the information outlets.
Z100-TYPE HARDWARE
2 - 8 3