TD040600-0I
C
5
Cabling Considerations
When attaching signal cables to the EISB, Table 1 should be considered.
Medium Signaling and
Data Rate
Minimum Required
Cable
Maximum Segment
Distance
Copper 10BASE-T
10 Mbps
Category 3 UTP
100 m (328 ft)
Copper 100BASE-TX
100 Mbps
Category 5 UTP
100 m (328 ft)
Fiber 100BASE-FX
100 Mbps
1300 nm, multimode
50/125 or 62.5/125
μ
m
Full-Duplex :
2 km (6562 ft)
Half-Duplex :
412 m (1352 ft)
Fiber 100BASE-FX
100 Mbps
1300 nm, single-mode
Full-Duplex :
15 km (49213 ft)
Half-Duplex :
412 m (1352 ft)
Table 1 — Cabling Considerations
Observe in Table 1 that segment distance is very limited when using copper
media — regardless of data rate. Although 10BASE-T links can use Category
3, 4 or 5 cable, 100BASE-TX segments
must
use Category 5 or higher.
A popular choice for improved distance is multimode fiber — which also gives
good electromagnetic noise immunity and optimum protection from lightning
strikes. Considerable distance can be achieved in full-duplex mode — and the
greatest distance can be realized in full-duplex mode with single-mode fiber.
Note that half-duplex operation yields a modest, fixed distance which does not
vary with the type of fiber in use. This is because half-duplex mode is limited
by the
collision domain
— irrespective of the length and type of fiber.
EISB switches offer three types of field connectors. Copper ports accept RJ-45
modular plugs. Two choices of fiber connectors are available: ST and SC.
