1-3
PA-2FE-TX and PA-2FE-FX Two-Port Fast Ethernet Port Adapter Installation and Configuration
OL-3474-06
Chapter 1 Overview
IEEE 802.3u 100BASE-T Specifications
Figure 1-3
Maximum Segment and Network Lengths—100BASE--FX and 100BASE-TX
Maximum network length
(half-duplex, one repeater)
4
200 m
272 m
Data rate
100 Mbps
100 Mbps
Signaling method
4B/5B
5
block coded, scrambled,
with MLT-3 line coding
4B/5B block coded, with NRZI
line coding
Connector
RJ-45 (ISO/IEC 60603-7:-1990
SC-type: dual simplex or single
duplex for RX and TX
Topology
Star/hub
Star/hub
1.
EIA/TIA-568 or EIA-TIA-568 TSB-36 compliant.
2.
Cisco does not supply Category 5 UTP RJ-45 cables. However, they are available commercially.
3.
Data Terminal Equipment (DTE to DTE), see
Figure 1-3
.
4.
DTE to Repeater to DTE, see
Figure 1-3
.
5.
4B/5B encoding or block coding, encodes four data bits into a 5-bit transmission sequence.
Table 1-1
Cabling Specifications
(continued)
Parameter
100BASE-TX
100BASE-FX (Multimode)
Maximum segment length, full duplex
100 m TX
DTE
DTE*
*DTE = Data Terminal Equipment
**Because repeaters have more delay, total network length is shorter.
2000 m FX–multimode
Maximum segment length, half duplex
100 m TX
DTE
DTE
412 m FX
Maximum segment length, full duplex
10,000 m FX–single mode
DTE
DTE
Maximum network length, half duplex
200 m TX
DTE
DTE
R
(Repeater)
272 m FX**
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