Lucent Technologies Release 6 manual Cross-Connect Fields

DEFINITY Enterprise Communications Server Release 6	Issue 5
Installation and Test for Multi-Carrier Cabinets 555-230-112	May 1998

2Install Telecommunications Cabling

Equipment Room Hardware Page 2-3

Cross-Connect Fields

Each MDF contains a trunk/auxiliary field and a distribution field. The trunk/auxiliary field contains 3 cross-connect areas:

1.The green field terminates the network interface leads from the Central Office (CO) and provides the terminals to cross-connect the leads to the purple or yellow fields as required. A single row of the 110-type terminal block can terminate twenty-four 1-pair, eight 3-pair, or twelve 2-pair trunks.

2.The purple field terminates the trunk circuits from the system with WP-90929, List 1 or 3 concentrator cables. Also, 25-pair cables can be used to terminate trunk circuits from the system with each trunk circuit pack connecting to one 25-pair row of the 110-type terminal block. Each terminal block row can terminate twenty-four 1-pair, eight 3-pair, or twelve 2-pair trunks.

3.The yellow field provides cross-connect terminals for all miscellaneous leads from the system, such as alarm monitors, emergency transfer relay power, and attendant console power. This field is used for emergency transfer wiring, paging equipment, music sources, and so forth.

The distribution field contains 4 cross-connect areas:

1.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:

This is the case except for the 16 port analog circuit pack and the MET circuit pack. The 16-port analog line circuit pack requires an adapter cable to connect from 1 connector on the system to 2

25-pair connectors on a 110-type terminal block. Two MET circuit packs require a concentrator cable to connect from 2 connectors on the system to one 25-pair connector on a 110-type terminal block.

2.The yellow field (auxiliary field) terminates all 25-pair cables from the auxiliary cabinet and adjunct equipment cabinets. The yellow field is located in the lower right-hand corner of the distribution field.

3.The white field (station field) terminates the station wiring. The white field indicates 3-pair station circuits (8 circuits per 25-pair cable) routed through a satellite closet.

4.The blue field (station field) also terminates station wiring. The blue field indicates 3- and/or 4-pair station circuits (8 or 6 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) (wire length) of the MDF.