Question by
Ghaouar Camij Toschian posted 28 Apr 2000 |
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question about wireless ethernet
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How far should the wireless ethernet hubs be from each other?
How would a computer determine to which hub it is connected, if it can receive a signal from both of them?
Can the wireless hubs be connected to an ethernet switch?
I am thinking about the Airport wireless hub developed by Apple and Lucent that costs $300 and can connect 10 computers. Is it possible to build an internal network in a large building by having a central ethernet switch and connecting the wireless hubs to it?
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Answer by
Dmitri Abaimov posted 28 Apr 2000 |
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Hello, Ghaouar,
Let me put my answers in caps between your lines, although its not very convenient, I know...
> How far should the wireless ethernet hubs be from each other?
IT'S GREATLY DEPENDS ON THE COVERAGE AREA, THAT'S IN TURN DEPENDS ON YOUR SITE. IF IT'S AN AIRPORT (MEANING OPEN AREA) IT MAY BE ~100-200 M OR LESS. IF IT'S REGULAR OFFICE, I WOULD PUT THEM IN A CORRIDOR AREAS, SAY 30-50M. APART.
NOBODY CAN TELL YOU FOR SURE BEFORE COMPLETING SITE SURVEY FOR YOU.
> How would a computer determine to which hub it is connected, if it can receive a signal from both of them?
THEY HAVE TO BE INSTALLED AT DIFFERENT SUB-CHANNELS SO THAT PC WILL BE ABLE TO WORK ONLY TO ONE AT A TIME. OR YOU NEED ROAMING FUNCTION ENABLED TO PREVENT COMMUNICATION TO MULTIPLE WIRELESS HUBS (I WOULD CALL THEM BRIDGES)
> Can the wireless hubs be connected to an ethernet switch?
WHY NOT? THEY HAVE STANDART 10BASE-T PORT, SO YOU MAY CONNECT THEM TO 10MB/S SWITCH. BESIDES, YOU ALREADY HAVE ONE BOTTLENECK - YOUR WIRELESS CELL, WHERE ALL USERS OF ONE SUB-CHANNEL SHARE THE SAME 10-MB/S BUS. WHY NOT TO TRY TO AVOID ANOTHER BOTTLENECK AT CONCENTRATOR (WIRED HUB)?
> I am thinking about the Airport wireless hub developed by Apple and Lucent that costs $300 and can connect 10 computers. Is it possible to build an internal network in a large building by having a central ethernet switch and connecting the wireless hubs to it?
THEORETICALLY NO PROBLEM. BUT YOU MAY NOT KNOW HOW MANY WAVEPOINTS (LUCENT WIRELESS-TO-WIRED BRIDGES) YOU WILL NEED BEFORE DOING SITE SURVEY. AGAIN,
ITS PRETTY MUCH DEPENDING ON YOUR SITE'S EMI-RF PROPAGATION SITUATION
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With best regards,
Dmitri Abaimov, RCDD
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