Configuration Rules For Gigabit Ethernet (Sm And Tm); Configuration Rules For The 3300 Sm And Tm - 3Com SuperStack 3 Switch 3300 XM User Manual

Configuration Rules
for Gigabit
Ethernet (SM and
TM)
Configuration Rules
for the 3300 SM
and TM

Configuration Rules for Gigabit Ethernet (SM and TM)

Gigabit Ethernet is designed to run over four media:
Single-mode fiber optic cable, with connections up to 5km.
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Multimode fiber optic cable, with connections up to 550m.
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Balanced, shielded copper cabling, with connections up to 25m.
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Category 5 cabling, with connections up to 100m.
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Table 4 Gigabit Ethernet cabling
Gigabit Ethernet
Transceivers Fiber Type
62.5 µm MM
1000BASE-LX
50 µm MM
50 µm MM
10 µm SM
62.5 µm MM
1000BASE-SX
62.5 µm MM
50 µm MM
50 µm MM
1000BASE-CX N/A
1000BASE-T N/A
MM = Multimode SM = Single-mode
The SM Switch has a Gigabit Ethernet fiber optic 1000BASE-SX port
while the TM switch has a 1000BASE-T port. These ports provide a
1000Mbps full duplex connection to another Gigabit Ethernet device. Full
duplex allows packets to be transmitted and received simultaneously and,
in effect, doubles the potential throughput of a link.
For the SuperStack 3 Switch 3300 SM:
Use Multimode fiber optic cable (see Table 4 for details).
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The 1000BASE-SX port is permanently fixed at 1000Mbps with full
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duplex.
For the Superstack 3 Switch 3300 TM:
the maximum UTP cable length is 100m (328ft) over Category 5 cable.
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The 1000BASE-T port is permanently fixed at 1000Mbps with full
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duplex.
Modal Lengths Supported
Bandwidth Specified by IEEE
(MHz/km) (meters)
500 2–550
400 2–550
500 2–550
N/A 2–5000
160 2–220
120 2–275
400 2–500
500 2–550
N/A 25
N/A 100
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