ZyXEL Communications IES-1248-51 Guía de usuario descargar pdf (Pagina 62)

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Chapter 4 MDF Connections

IES-1248-51V User’s Guide

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 16 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-1248-51V.

• 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.

4.3 Telco-50 Cables

Telco-50 cables are used for data and voice applications with MDFs (Main

Distribution Frame), patch panels and distribution boxes. They can also be used as

extension cables. Telco-50 cables are made up of 25 twisted-pair copper wires.

Connect a Telco-50 connector to one end of the cable (see Chapter 71 on page

579 for pin assignments) and connect the other end directly to an MDF;

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