Station circuit distribution from equipment room
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:
Bridged taps are not allowed on any part of the station wiring.
