Chapter 4 Mdf Connections; Mdf Connections Overview; Mdf (Main Distribution Frame); Figure 4-1 Mdf (Main Distribution Frame) Wiring - ZyXEL Communications IES-1248 VDSL-SWITCH User Manual

4.1 MDF Connections Overview

Observe the following before you start:
Refer to the Hardware Specifications Appendix for the gauge of telephone wire to use.
Follow the pin assignments shown in Hardware Specifications Appendix to wire Telco-50 cables to Telco-
50 connectors.

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.
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.
Use a punch-down tool to seat telephone lines into MDF blocks.
Multiple upper and lower MDF port connections are shown as one line in the following figures.
MDF Connections
This chapter shows you how to connect the Telco-50 connectors to an MDF.

Figure 4-1 MDF (Main Distribution Frame) Wiring

IES-1248 User's Guide
Chapter 4
MDF Connections
4-1