Straight-Through Wiring; Figure 23: Straight Through Wiring; Table 13: 10/100Base-Tx Mdi And Mdi-X Port Pinouts - LG-Nortel iPECS ES-3026 Installation Manual

Table 13: 10/100BASE-TX MDI and MDI-X Port Pinouts

PIN
1
2
3
4
5
6
7
8
a.
If the twisted-pair cable is to join two ports and only one of the ports has
S -T
TRAIGHT HROUGH
an internal crossover (MDI-X), the two pairs of wires must be straight-
W
IRING
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.

Figure 23: Straight Through Wiring

MDI Signal Name
Transmit Data plus (TD+)
-52V power (Negative V
Transmit Data minus (TD-)
-52V power (Negative V
Receive Data plus (RD+)
GND (Positive V
port
-52V power (Negative V
-52V power (Negative V
Receive Data minus (RD-)
GND (Positive V
port
GND (Positive V
port
GND (Positive V
port
The "+" and "-" signs represent the polarity of the wires that make up each wire
pair.
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Straight-Through Cable
1
End A 2
3
4
5
6
7
8
– 47 –
A
PPENDIX
Twisted-Pair Cable Assignments
MDI-X Signal Name
a
Receive Data plus (RD+)
) GND (Positive V
port
Receive Data minus (RD-)
) GND (Positive V
port
Transmit Data plus (TD+)
) -52V power (Negative V
) GND (Positive V
port
) GND (Positive V
port
Transmit Data minus (TD-)
) -52V power (Negative V
) -52V power (Negative V
) -52V power (Negative V
White/Orange Stripe
Orange
White/Green Stripe
Blue
White/Blue Stripe
Green
White/Brown Stripe
Brown
| Cables and Pinouts
B
ES-3026/3026P
)
port
)
port
)
port
)
port
)
port
)
port
)
port
)
port
1
2
End B
3
4
5
6
7
8