Install Telecommunications Cabling
Station Circuit Distribution from Equipment Room
SI Installation and Upgrades
421
June 2004
Station Circuit Distribution from Equipment Room
This section explains the station circuit distribution from the equipment room to the information outlets
for new wiring installations. Example connection diagrams are provided to show the options for running
and connecting the station cables.
If most of the telephones/voice terminals that require remote powering are within 250 ft (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 from the
equipment room to satellite locations. Then, the 4-pair station circuits are run from the satellite locations
to the information outlets.
This section has information about
•
4-Pair Station Circuits
on page 421
•
3-Pair to 4-Pair Station Circuit Distribution
on page 421
Lists of terminals that can be connected to the system are provided in
•
Voice and Data Terminals
on page 425
•
Connectable Administration Terminals
on page 427
4-Pair Station Circuits
Four-pair circuits can be run directly from an equipment room MDF to a 258A or BR2580A adapter as
shown in
Figure 147, 4-Pair Circuit Distribution and Connectivity,
on page 422. The 4-pair station cables
connect the adapter to the information outlets.
The 4-pair station cables can be run directly from the equipment room to the information outlets if 4-pair
terminal blocks are used in the distribution field. See
Figure 148, 4-Pair Run to Equipment Room or
Satellite Location,
on page 422. The station cables must be field-terminated on the 110-type terminal
blocks.
If 110-type terminal blocks are used with a modular plug-ended station cable, an adapter can be
connected directly to the 110-type terminal block connectors. See
Figure 149, 4-Pair Run to Equipment
Room or Satellite Location,
on page 423.
3-Pair to 4-Pair Station Circuit Distribution
Figure 150, 3-Pair to 4-Pair Satellite Location Connectivity,
on page 424 shows the 3-pair circuit
distribution from an equipment room MDF to a satellite location using 110-type hardware. Four-pair
circuits are distributed from the satellite location to the information outlets.
Three-pair circuits can also be run directly from the equipment room MDF to a 356A adapter as shown in
Figure 151, 3-Pair to 4-Pair Circuit Distribution and Connectivity,
on page 425. Four-pair station cables
connect the adapter to the information outlets. Four-pair station cables can be run directly from a satellite
location to the information outlets as previously described.
NOTE:
Bridged taps are not allowed on any part of the station wiring.
