3Com 3CRWX120695A, Hardware Installation Manual

Page: 26 / 66

26 C
HAPTER
2: I
NSTALLING AND
C
ONNECTING A
WX S
WITCH
Cable Requirements To avoid installation problems, use the proper cables.
WARNING: The gigabit Ethernet fiber-optic interfaces use Class 1 lasers.
To reduce the risk of eye injury, do not stare into the interface or
otherwise direct the laser beam into your eye.
Serial Console Cable
The serial console port has a female DB-9 connector and supports the
EIA-232D signaling standard. You need a standard
DB-9-male-to-DB-9-female PC modem cable. Table 6 lists the pin signals.
Network Cables
Table 7 lists the interface types supported by WX switches and the cable
type required for each type of interface.
Table 6 Serial Console Pin Signals
WX Pin Usage PC Pin Usage
2 Receive 3 Transmit
3 Transmit 2 Receive
5 Ground 5 Ground
Table 7 Ethernet Interfaces
Link Type Cable Type
Connector
Type Maximum
Distance
10/100BASE-T Cat 5 copper
Straight-through or crossover
signaling
RJ-45 100 m
(328 feet)
1000BASE-SX Multimode 50-µm fiber SC 550 m
(1804.5 feet)
Multimode 62.5-µm fiber SC 275 m
(902.2 feet)