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: