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GeniusPro/Lightpalette Operator's Manual - Strand Lighting

GeniusPro/Lightpalette Operator's Manual - Strand Lighting

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Ethernet Overview<br />

A typical configuration for a star topology using UTP cable requires the use of a HUB, Repeater or Concentrator. At<br />

the centre of the star a hub links the segments of the star together when they are operating correctly but isolates them<br />

if a fault should occur (such as an open circuit) improving fault immunity.<br />

Each segment of the star is a separate point to point twisted pair connection. If one branch of the star fails, only one<br />

node would be affected (except for the route from the console to the HUB). The maximum length of each twisted pair<br />

segment is 100m (330ft).<br />

Optical Fibre<br />

Fibre Optic Ethernet systems have distinct cost and implementation disadvantages that limit their use as a direct inter<br />

node connection medium. However, fibre optic systems can provide a powerful backbone technology due to :<br />

●<br />

●<br />

●<br />

●<br />

●<br />

Higher data handling capacity.<br />

Noise immunity<br />

Allow for 100mhz and higher data rates<br />

A segment can be up to 3000m in length<br />

Availability of Bridges, repeaters and routers<br />

Comparison Table<br />

Description Twisted Pair Thin Net Thick Net AUI Fibre<br />

Recommended Recommended Not<br />

Not Recommended<br />

Recommended Recommended for long runs<br />

Cable<br />

110 ohm UTP<br />

22-26 AWG<br />

2 pairs<br />

RG-58A/U or<br />

RG-58C/U<br />

50 Ohm Coax<br />

External<br />

Transceiver<br />

Drop<br />

50/125,<br />

62.5/125<br />

80/125,<br />

100/140,<br />

micron core<br />

file:///C|/LIGHTP/HELP.ENG/page43.htm (4 of 9)11/2/2004 3:03:20 AM

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