10/100Base-Tx Pin Assignments; Straight-Through Wiring; Table 5: 10/100Base-Tx Mdi And Mdi-X Port Pinouts - SMC Networks WEBS-N User Manual

10/100BASE-TX P
S -T
TRAIGHT HROUGH
A
IN 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. 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. 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.

Table 5: 10/100BASE-TX MDI and MDI-X Port Pinouts

PIN MDI Signal Name
1 Transmit Data plus (TD+)
2 Transmit Data minus (TD-)
3 Receive Data plus (RD+)
6 Receive Data minus (RD-)
4, 5, 7, 8 Not used
a. The "+" and "-" signs represent the polarity of the wires that make up each wire pair.
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 connections.
A
MDI-X Signal Name
a
Receive Data plus (RD+)
Receive Data minus (RD-)
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Not used
– 90 –
C | Cables and Pinouts
PPENDIX

10/100BASE-TX Pin Assignments