AT&T System 75, Wiring Diagram

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Station Wiring Design
Layout
Locating Information Outlets
The customer or marketing representative must provide floor plans
showing the information outlet locations and types (flush- or
surface-mounted) required. The floor plans must also show a complete
overview of all conduit and cabling facilities in the building.
Locating Satellites and Sites
Use the following information when determining site, satellite, or adapter
locations.
a. Keep the number of locations to a minimum.
b . To minimize the station wiring distances, centrally locate the
sites/satellites, or adapters among the information outlets.
c . Site/satellite locations must be easily accessible and contain ac
power receptacles.
Adapter Requirements
One 258A/BR2580A adapter is required for each 25-pair station cable
containing 4-pair station circuits. One 356A adapter is required for each
25-pair station cable containing 3-pair station circuits.
Hardware Requirements
Hardware requirements are the same as for the equipment room.
Sizing 4-Pair Station Cables
Use the scale of the floor plan to determine the approximate length of
the station cables required per the standard Premises Distribution
Systems wiring concepts.
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