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Appendix A. Cable and Pin Information
This appendix provides information on cables that can be used with the 8270. It
also provides minimum pinout information so that you can verify that the cables that
you are using are correctly wired.
Connecting to the Management (EIA 232) Port
Table A-1 lists the type of cables that are used when connecting to the EIA 232
port on the 8270.
Note: Use a properly shielded and terminated cable to maintain product EMC
compliance.
Table
A-1. Connecting to the EIA 232 Port
Cable Function
Cable Type or Cable Solution
Connect a modem to the EIA 232 port
Connect one end of a straight-through, EIA
232 modem cable to the EIA 232 port and
the other to the modem.
Connect a PC or other DTE device to the
EIA 232 port
Connect one end of a crossover, EIA 232
cable to the EIA 232 port and the other end
to the PC or DTE device.
Attach a null-modem adapter to the EIA 232
port. Then, attach a straight-through
modem cable to the null-modem adapter.
Twisted-Pair Cable Pinouts
When connecting devices to the Token-Ring ports on the 8270, you must use a
straight-through cable. Diagrams of these cables follow.
Straight-Through 100-Ohm and 120-Ohm Cable
The 8270 RJ-45 connector makes ground available on the shield and on pins 1, 2,
7, and 8. Shielded cables will provide continuity for ground to any shielded
connector on the other end of the cable.
Copyright IBM Corp. 1998
A-1
Summary of Contents for 8270
Page 1: ...8270 Models 600 and 800 Installation and Service Guide...
Page 10: ...x 8270 Nways LAN Switch Models 600 and 800...
Page 13: ...Safety Information xiii...
Page 14: ...xiv 8270 Nways LAN Switch Models 600 and 800...
Page 16: ...xvi 8270 Nways LAN Switch Models 600 and 800...
Page 78: ...6 8 8270 Nways LAN Switch Models 600 and 800...
Page 92: ...B 8 8270 Nways LAN Switch Models 600 and 800...
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