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IEEE 802.3u 100BaseT Specifications
IEEE 802.3u 100BaseT Specifications
Table 1-3 lists the cabling specifications for 100-Mbps Fast Ethernet transmission over UTP, FTP,
and fiber-optic cables. Table 1-4 summarizes IEEE 802.3u 100BaseT physical characteristics.
Table 1-3
Specifications and Connection Limits for 100-Mbps Transmission
Parameter
Cable specification
Maximum cable length
Maximum segment length
Maximum network length
1
EIA/TIA-568 or EIA-TIA-568 TSB-36 compliant.
2
Cisco Systems does not supply Category 5 UTP RJ-45 or 150-ohm FTP MII cables. Both are available commercially.
3
This is the cable between the MII port on the PA-FE port adapter and the appropriate transceiver.
4
This length is specifically between any two stations on a repeated segment.
Table 1-4
IEEE 802.3u Physical Characteristics
Parameter
Data rate (Mbps)
Signaling method
Maximum segment length (meters)
Media
Topology
1
DTE = data terminal equipment.
1-10
PA-FE-TX and PA-FE-FX Fast Ethernet 100BaseT Port Adapter Installation and Configuration
RJ-45
1
2
Category 5
UTP
, 22 to 24 AWG
–
328 ft (100 m) for 100BaseTX
4
656 ft (200 m)
(with 1 repeater)
100BaseFX
100
Baseband
100 m between repeaters
SC-type: dual simplex or single duplex for Rx and Tx
Star or Hub
MII
Category 3, 4, or 5, 150-ohm UTP or FTP,
or multimode optical fiber
1.64 ft (0.5 m) (MII-to-MII cable
4
3.28 ft (1 m)
or 1,312 ft (400 m) for
100BaseFX
–
100BaseTX
100
Baseband
100 m between DTE
RJ-45MII
Star or Hub
SC-Type
62.5/125 multimode optical
fiber
3
)
–
328 ft (100 m)
4
656 ft (200 m)
(with 1
repeater)
1
and repeaters
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