IBM 8270, Installation And Service Manual

Page: 49 / 98

Cabling
This section provides instructions for connecting devices (such as hubs, servers,
personal computers, and workstations) to an 8270. Remember these tips when
connecting cables:
¹
Avoid stretching or bending the cables excessively.
¹
Avoid routing the cables near potential sources of electromagnetic interference,
such as motorized devices and fluorescent lights.
¹
Avoid trip hazards by routing the cables away from aisles and other areas
where people walk. If such routes cannot be avoided, use floor cable covers or
similar material to secure and protect the cables.
¹
Be sure that the cables connected to the 8270 are supported so that the cable
connectors are not excessively strained.
¹
Use a category 3 or better cable or 150-ohm, STP or STP-A cabling.
¹
Some attaching devices require impedance-matching baluns at each end. Be
sure to use them if the attaching device requires them.
Connecting Devices to the Token-Ring Ports
If you will be using building wiring (in-the-wall cables) to connect devices to the
8270, go to “Connecting Devices to the Token-Ring Ports Using Building Wiring” on
page 2-23.
If you
will not be using building wiring, follow these steps to connect one or more
devices to the Token-Ring ports on an 8270:
Step 1. Using the IBM 8270 Cabling Chart provided by your network administrator
as a guide, connect the cables between the 8270 and other devices as
illustrated in Figure 2-13 on page 2-22. It illustrates an RJ-45 connector
on each end. Depending on the cable type you use, the device end of
the cable might also have a 9-pin, D-shell or 150-ohm data connector.
Chapter 2. Installation
2-21