Install Telecommunications Cabling
MDF Cross-Connect Fields
SI Installation and Upgrades
407
June 2004
The distribution field contains four cross-connect areas:
•
The purple field (port field) terminates 25-pair cables from the system. Each line circuit pack
connects to one 25-pair row of the 110-type terminal block. One 25-pair cable is required for each
line circuit pack.
NOTE:
The 16-port analog line circuit pack requires an adapter cable to connect from one
connector on the system to two 25-pair connectors on a terminal block. Two MET circuit
packs require a concentrator cable to connect from two connectors on the system to one
25-pair connector on a terminal block.
•
The yellow field (auxiliary field) terminates all 25-pair cables from the auxiliary cabinet and the
Processor Interface. The yellow field is located in the lower right-hand corner of the distribution
field.
•
The white field (station field) terminates the station wiring. The white field indicates 3-pair station
circuits (eight circuits per 25-pair cable) routed through a satellite closet.
•
The blue field (station field) also terminates station wiring. The blue field indicates 3- and/or 4-
pair station circuits (eight or six circuits, respectively, per 25-pair cable). The fourth pair, of the 4-
pair station circuit provides adjunct power from the cross-connect field on an as-needed basis to
terminals within 250 feet (76 m) of the MDF.
