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Technical Glossary

Ethernet Specifications

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Maximum Number Stations
10BaseT: 1,024 stations without using Layer 2 bridges
10Base2: 30 MAUs
10Base5: 100 MAUs
100BaseT: 1 Class I hub per coll. domain; 2 Class II hubs per coll. domain
VG-AnyLAN: 1024 nodes per segment (HP recommends 250 node practical limit)
Distance Between Stations
10BaseT: no min. distance
10Base2: Min. spacing between MAUs is 0.5 meters
10Base5: Min. spacing between MAUs is 2.5 meters
VG-AnyLAN: UTP Cat 3, 4 max. dist. is 100m; Cat 5 max. dist. is 200m
Maximum Length
10BaseT: 100 meters (328 feet)
10Base2: 185 meters (600 feet)
10Base5: 500 meters (1,640 feet)
FOIRL: 500 meters each link segment (point-to-point) when 5 segments are present
Drop cables: 50 meters (164 feet)
Max. Propagation Delay
10BaseT: 1000 ns
10Base2: for a coax segment is 950 ns
10Base5: for a coax segment is 2165 ns; for a link segment (point-to-point) is 2570 ns
Attenuation
10BaseT: see chart below
10Base2: 8.5 dB for each 185 m. segment
10Base5: 8.5 dB for each 500 m. segment
FOIRL: <4dB/kM and bandwidth of >150MHz referred to 1km at a wavelength of 850nm

Attenuation (UTP only)
The worst case attenuation for any pair within a connector or cross-connect should not exceed the following values:

Frequency (MHz) Category-3 (dB) Category-4 (dB) Category-5 (dB)

4.0

0.4

0.1

0.1

10.0

0.4

0.1

0.1

16.0

0.4

0.2

0.2

100.0

--

--

0.4

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