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Station circuit distribution from equipment room
Issue 3 January 2008 45
If most of the telephones/voice terminals that require remote powering are within 250 feet (76.2
meters) 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 45
● 3-pair to 4-pair station circuit distribution on page 45
● Connected cable station adapters on page 50
Lists of telephones and consoles currently sold are provided in Table 7: Connectable telephone
and consoles on page 70.
4-pair station circuits
Four-pair circuits, via station cables, can be run directly from an equipment room MDF to a
258A or BR2580A adapter as shown in Figure 18: 4-pair circuit distribution and connectivity
on
page 46. 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 19: 4-pair run to equipment
room or satellite location on page 47. 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 20: 4-pair run to
equipment room or satellite location on page 47.
3-pair to 4-pair station circuit distribution
Figure 21: 3-pair to 4-pair satellite location connectivity on page 48 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 22: 3-pair to 4-pair circuit distribution and connectivity
on page 49. 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:
Note: Bridged taps are not allowed on any part of the station wiring.