100base-tx/10base-t pin assignments, Straight-through wiring, Crossover wiring – Foundry Networks IRONPOINT 250 User Manual
Page 46
Foundry IronPoint 250 Installation Guide
B-2
© 2007 Foundry Networks, Inc.
August 2007
100BASE-TX/10BASE-T Pin Assignments
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 port on the access point supports automatic MDI/MDI-X operation, so you can use
straight-through or crossover cables for all network connections to PCs, switches, or hubs.
Straight-Through Wiring
Because the 10/100 Mbps port on the access point uses automatic MDI/MDI-X pin configuration,
you can use “straight-through” or “crossover” cable for network connections to PCs, hubs or
switches.
Figure B-2. Straight-Through Wiring
Crossover Wiring
Because the 10/100 Mbps port on the access point uses automatic MDI/MDI-X pin configuration,
you can use “straight-through” or “crossover” cable for network connections to PCs, hubs or
switches.
Pin
MDI Signal Name
MDI-X Signal Name
1
Receive Data plus (RD+)
and GND (Positive V
port
)
Transmit Data plus (TD+)
and -48V feeding power (Negative V
port
)
2
Receive Data minus (RD-)
and GND (Positive V
port
)
Transmit Data minus (TD-)
and -48V feeding power (Negative V
port
)
3
Transmit Data minus (TD+)
and -48V feeding power (Negative V
port
)
Receive Data plus (RD+)
and GND (Positive V
port
)
4
GND (Positive V
port
)
-48V feeding power (Negative V
port
)
5
GND (Positive V
port
)
-48V feeding power (Negative V
port
)
6
Transmit Data minus (TD-)
and -48V feeding power (Negative V
port
)
Receive Data minus (RD-)
and GND (Positive V
port
)
7
-48V feeding power (Negative V
port
)
GND (Positive V
port
8
-48V feeding power (Negative V
port
)
GND (Positive V
port
Note: The “+” and “-” signs represent the polarity of the wires that make up each wire pair.
White/Orange Stripe
Orange
White/Green Stripe
Green
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Straight-through Cable
End A
End B
Blue
White/Blue Stripe
Brown
White/Brown Stripe