Avaya 6211 Mode D'Emploi

Designing the MDF is a two-step process: first, determine the size of the MDF, second, construct the
MDF. As you proceed with the design, keep in mind that function is more important than cost in
reaching a final decision since it is possible for the final installation to be inexpensive but nonfunctional.
A design that imposes operational limits to save costs may prove less desirable in the long run. Use
your site analysis to compare alternatives and arrive at the best solution in terms of both function and
cost.

Since the design of the MDF affects the design of the equipment room, be sure that your completed
design for the MDF is compatible with your equipment room plans or with the room that you have
selected for the MDF location. (When designing the MDF for a raised-floor installation, follow the

instructions under  Designing the MDF for a Raised Floor  in this chapter.) Figure 2-5, Overall

Equipment Wiring Plan, shows the overall equipment wiring plan for R2V1 through R2V4 based upon

the standard star configuration.

The MDF is the largest cross-connect field of the wiring installation. It is where the incoming trunk
cables terminate and cross-connect to the trunk ports of the switch and where the building distribution
cables cross-connect to the line ports of the switch. The MDF consists of four fields: network

services/CO trunks (green), auxiliary and miscellaneous (yellow), distribution (white), and equipment
(purple).