802.11g is 54mbps, is that my bandwidth?

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802.11g said it was 54mbps. I'm only getting 356kbps when i do a
bandwidth test. Does it mean that my bandwidth is 54mbps or something
else? Thanks

Joe


Re: 802.11g is 54mbps, is that my bandwidth?


[POSTED TO alt.internet.wireless - REPLY ON USENET PLEASE]

22:05:50 -0800, fbalbert@gmail.com wrote:

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What kind of bandwidth test?  If you are testing over the Internet, then you
are probably measuring the speed of your Internet connection, not your
wireless network.

--
Best regards,        HELP FOR CINGULAR GSM & SONY ERICSSON PHONES:
John Navas           <http://navasgrp.home.att.net/#Cingular

Re: 802.11g is 54mbps, is that my bandwidth?


On Fri, 04 Nov 2005 09:47:16 GMT, John Navas

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How would I do a bandwidth test? I am about to set up a wireless
network and would love to be able to do some testing.

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For email, use Usenet-20031220@spamex.com

Re: 802.11g is 54mbps, is that my bandwidth?


[POSTED TO alt.internet.wireless - REPLY ON USENET PLEASE]


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The simple way is to transfer a file from computer to computer and time how
long it takes.  After all, actual throughput is what really counts.

Tom's Networking uses Qcheck - A free Network Testing Utility
<http://www.tomsnetworking.com/Sections-article20.php

--
Best regards,        HELP FOR CINGULAR GSM & SONY ERICSSON PHONES:
John Navas           <http://navasgrp.home.att.net/#Cingular

Re: 802.11g is 54mbps, is that my bandwidth?


wrote:

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Online speed testers aren't going to measure your wireless bandwidth
because the typical DSL or cable modem connections are much slower
than what the wireless is capeable of doing.  To test your *WIRELESS*
speed (without being impacted by anything else) requires two
computers.  One is plugged directly into the wireless router with an
ethernet cable.  It should be running 100baseTX-FDX and be a fairly
high horsepower machine.  The other computer is your wireless test
computer.  Firewalls on both computers should be disabled to prevent
them from becoming a connectivity problem.  

On each machine, run IPerf:
  http://dast.nlanr.net/Projects/Iperf /
for your favorite operating systems.  Setup the wired computer as a
server.  Run the client version on the wireless computer.  With a
54Mbit/sec connection, you should see 15-24Mbits/sec thruput maximum.
If you're getting about 15Mbits/sec, then turn *OFF* the 802.11b
compatibility feature in the unspecified model Belkin router and try
again.  There are other settings that can screw up thruput.

This may also be of interest...

This is stolen from an Atheros PDF at:
  http://www.atheros.com/pt/atheros_range_whitepaper.pdf
with some additions and corrections by me.

Non-overlapping    Modulation     Max      Max     Max
Channels -------        |         Link     TCP     UDP
               |        |           |       |       |
802.11b        3       CCK         11      5.9     7.1
802.11g (with
  802.11b)     3   OFDM/CCK        54     14.4    19.5
802.11g only   3      OFDM         54     24.4    30.5
802.11g turbo  1      OFDM        108     42.9    54.8
802.11a       13      OFDM         54     24.4    30.5
802.11a turbo  6      OFDM        108     42.9    54.8

The paper claims that encryption is enabled for these calculations,
but my numbers seem to indicate that these number are for encryption
disabled.  Dunno for sure.  The Max TCP and Max UDP are the
theoretical maximum thruput rates.

--
Jeff Liebermann     jeffl@comix.santa-cruz.ca.us
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

Re: 802.11g is 54mbps, is that my bandwidth?


fbalbert@gmail.com wrote:

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54 Mb/s is the peak data rate on the wireless segment of that net
connection.  The STR (Sustained Transfer Rate) will be far less
(roughly half) of the peak rate.  And, as John N. implied, you are
likely reporting a measurement of the end-to-end download speed
over a long chain in which the wireless segment is the fastest
link.

--
Cheers, Bob

Re: 802.11g is 54mbps, is that my bandwidth?


[POSTED TO alt.internet.wireless - REPLY ON USENET PLEASE]


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More like: not the slowest link.  Methinks the Internet backbone will be at
least a little bit faster.  ;)
--
Best regards,        HELP FOR CINGULAR GSM & SONY ERICSSON PHONES:
John Navas           <http://navasgrp.home.att.net/#Cingular

Re: 802.11g is 54mbps, is that my bandwidth?


John Navas wrote:

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Right you are.  When I test D/L speed, I never use the backbone; so,
of course, I assume everybody else would do it my way. ;-) ;-)

--
Cheers, Bob

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