107
Installing the Avaya™ S8700 Media Server with Avaya™ MCC1 or SCC1 Media Gateway
May 2003
MDF Cross-Connect Fields
Each Main Distribution Frame (MDF) contains a trunk/auxiliary field and a distribution field.
The trunk/auxiliary field contains three cross-connect areas:
•
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.
•
The purple field terminates the trunk circuits from the media gateway with WP-90929,
List 1 or 3 concentrator cables. Also, 25-pair cables can be used to terminate trunk
circuits from the media gateway with each trunk circuit pack connecting to one 25-pair
row of the 110-type terminal block. Each terminal block row can terminate 24 1-pair,
8 3-pair, or 12 2-pair trunks.
•
The yellow field provides cross-connect terminals for all miscellaneous leads from the
media gateway, 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 four cross-connect areas:
•
The purple field (port field) terminates 25-pair cables from the media gateway. 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 media gateway to two 25-pair connectors on a terminal block. The yellow
field (auxiliary field) terminates all 25-pair cables from the auxiliary cabinet (if used). 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 telephones and consoles within 250 feet (76 m) of the
MDF.
Placing the Main Distribution Frame
The preferred location of the Main Distribution Frame (MDF) is directly behind the media
gateways.
‘‘Typical 110A-Type Terminal Blocks (Avaya G600)’’ on page 108
shows a typical installation
using 110A-type terminal blocks.
