Edge-Core ES3526VA-PoE, Руководство по установке, Страница: 58 / 74

Cables
B-2
B
Table B-1 10/100BASE-TX MDI-X and MDI Port Pinouts
Straight-Through Wiring
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.)
We recommend connecting all four wire pairs as shown in the following diagram to
ensure that the cable can be used for either Fast Ethernet or Gigabit Ethernet
connections.
Figure B-2 Straight-through Wiring
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
and GND (Positive V
port
)
Transmit Data minus (TD-)
and -48V feeding power (Negative V
port
)
3
Transmit Data plus (TD+)
and -48V feeding power (Negative V
port
)
Receive Data plus (RD+)
and GND (Positive V
port
)
6
Transmit Data minus (TD-)
and -48V feeding power (Negative V
port
)
Receive Data minus (RD-)
and GND (Positive V
port
)
4, 5, 7, 8
Not used Not used
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
E nd A
E nd B
Blue
White/Blue Stripe
Brown
White/Brown Stripe