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A
PPENDIX
B
| Cables
Twisted-Pair Cable and Pin Assignments
– 68 –
10BASE-T/100BASE-TX P
IN
A
SSIGNMENTS
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45
connections: 100-ohm Category 3 or better cable for 10 Mbps connections, or
100-ohm Category 5 or better cable for 100 Mbps connections. Also be sure that
the length of any twisted-pair connection does not exceed 100 meters (328 feet).
The RJ-45 ports on the switch base unit support automatic MDI/MDI-X
operation, so you can use straight-through cables for all network connections to
PCs or servers, or to other switches or hubs. In straight-through cable, pins 1, 2,
3, and 6, at one end of the cable, are connected straight through to pins 1, 2, 3,
and 6 at the other end of the cable. When using any RJ-45 port on this switch,
you can use either straight-through or crossover cable.
Note:
The “+” and “-” signs represent the polarity of the wires that
make up each wire pair.
S
TRAIGHT
-T
HROUGH
W
IRING
If the twisted-pair cable is to join two ports and only one of the ports has an
internal crossover (MDI-X), the two pairs of wires must be straight-through.
(When auto-negotiation is enabled for any RJ-45 port on this switch, you can
use either straight-through or crossover cable to connect to any device type.)
You must connect all four wire pairs as shown in the following diagram to
support Gigabit Ethernet.
Table 12: 10/100BASE-TX MDI and MDI-X Port Pinouts
Pin
MDI Signal Name
MDI-X Signal Name
1
Transmit Data plus (TD+)
Receive Data plus (RD+)
2
Transmit Data minus (TD-)
Receive Data minus (RD-)
3
Receive Data plus (RD+)
Transmit Data plus (TD+)
6
Receive Data minus (RD-)
Transmit Data minus (TD-)
4,5,7,8
Not used
Not used
Summary of Contents for 8028L2
Page 1: ...INSTALLATION GUIDE ta TigerSwitchTM 10 100 1000 28 Port Gigabit Ethernet Switch SMC8028L2 ...
Page 2: ......
Page 4: ...20 Mason Irvine CA 92618 Phone 949 679 8000 ...
Page 16: ...COMPLIANCES AND SAFETY STATEMENTS 14 ...
Page 22: ...TABLES 20 ...
Page 24: ...FIGURES 22 ...
Page 30: ...CHAPTER 1 Introduction Description of Hardware 28 ...
Page 72: ...GLOSSARY 84 ...
Page 75: ......