SMC Networks 8724M INT - annexe 1, Руководство по установке

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T
WISTED
-P
AIR
C
ABLE AND
P
IN
A
SSIGNMENTS
B-3
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 using all four wire pairs as shown in the following diagram to
ease upgrade to Gigabit Ethernet.
Figure B-2 Straight-through Wiring
Crossover Wiring
If the twisted-pair cable is to join two ports and either both ports are labeled
with an “X” (MDI-X) or neither port is labeled with an “X” (MDI), a
crossover must be implemented in the wiring. (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 using all four wire pairs as shown in the following diagram to
ease upgrade to Gigabit Ethernet.
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
White/Brown Stripe
Brown Stripe