Chapter 4 Mdf Connections; Mdf Connections Overview; Mdf (Main Distribution Frame); Figure 15 Mdf (Main Distribution Frame) Wiring - ZyXEL Communications IES-1248-51 User Manual

This chapter shows you how to connect the Telco-50 connectors to an MDF.

4.1 MDF Connections Overview

Observe the following before you start:
• See Appendix B on page 445
• Follow the pin assignments shown in
Telco-50 connectors.
• See Chapter 1 on page 41
management connections.

4.2 MDF (Main Distribution Frame)

An MDF is usually installed between subscribers' equipment and the telephone company
(CO) in a basement or telephone room. The MDF is the point of termination for the outside
telephone company lines coming into a building and the telephone wiring in the building.

Figure 15 MDF (Main Distribution Frame) Wiring

• Connect wiring to end-user equipment to the lower ports of an MDF and connect wiring
from the telephone company to the upper ports of an MDF (see the previous figure).
• Some MDFs have surge protection circuitry built in between the two banks; thus, do not
connect telephone wires from the telephone company directly to your IES-1248.

Chapter 4 MDF Connections

C
H A P T E R
MDF Connections
for the gauge of telephone wire to use.
Appendix C on page 449
and Appendix C on page 449
IES-1248-51/51A/53 User's Guide
to wire Telco-50 cables to
for details on how to make the
4
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