Manufacturers

Archived from groups: alt.internet.wireless (More info?)

D-link, 3com ,linksys, buffalo, whos the best?

Archived from groups: alt.internet.wireless (More info?)

"Reece" <Reece@Reece.com> wrote in
news:407ede64$0$13899$65c69314@mercury.nildram.net:

> What about power output? Does it really matter in a home situation?

I was reading a WiFi review on Tom's Hardware networking guide and they
seemed to suggest some units with better output have more reliable
performance over distance. One of the examples that's been mentioned is an
increase in the power output of the Linksys wireless router in the newest
revision. But it really seems to make more difference what exactly the
obstructions are in the home. IE drywall vs brick vs tinted glass, etc.

Archived from groups: alt.internet.wireless (More info?)

Power output is limited by regulations 200mW in Us, 100mW in Europe etc.
The best manufacturer (at 'home' prices) is Draytek Vigor 2600G, has all the
features plus reliability.
Regards,
Martin

Archived from groups: alt.internet.wireless (More info?)

In article <WbHfc.10387$xw3.571@newssvr23.news.prodigy.com>,
gary <pleasenospam@sbcglobal.net> top-posted:
:"Martin²" <never@give.one> wrote in message
pYGfc.33366$Y%6.4236080@wards.force9.net...
:> Power output is limited by regulations 200mW in Us,

:Thats 1000 mW EIRP (1 Watt) in U.S.

The details of the US FCC limits are more complex than that. They depend
on what kind of spread spectrum you are using, and they depend on
some other factor.s Say 1000 mw EIRP is a good first approximation
for typical 11b and 11g equipment.

If, though, you are willing to reduce the output of your transmitter,
then for every 1 dBi you decrease the transmitter, you can increase the
gain on your antenna by 3 dBi -- thereby going over the usual
1000 mw EIRP limit.

I would suggest, though, that anyone serious about getting the maximum
possible EIRP read the FCC regs for themselves, as the rules are not
simple (or at least are not clearly written.) I have posted links to the
FCC sections in the past [the hostname for the regs isn't obvious,
unfortunately.]
--
IEA408I: GETMAIN cannot provide buffer for WATLIB.

Archived from groups: alt.internet.wireless (More info?)

In article <c5nnej$v4$1@canopus.cc.umanitoba.ca>, roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote:
>In article <WbHfc.10387$xw3.571@newssvr23.news.prodigy.com>,
>gary <pleasenospam@sbcglobal.net> top-posted:
>:"Martin²" <never@give.one> wrote in message
>:newsYGfc.33366$Y%6.4236080@wards.force9.net...
>:> Power output is limited by regulations 200mW in Us,
>
>:Thats 1000 mW EIRP (1 Watt) in U.S.
>
>The details of the US FCC limits are more complex than that. They depend
>on what kind of spread spectrum you are using, and they depend on
>some other factor.s Say 1000 mw EIRP is a good first approximation
>for typical 11b and 11g equipment.
>
>If, though, you are willing to reduce the output of your transmitter,
>then for every 1 dBi you decrease the transmitter, you can increase the
>gain on your antenna by 3 dBi -- thereby going over the usual
>1000 mw EIRP limit.
>
>I would suggest, though, that anyone serious about getting the maximum
>possible EIRP read the FCC regs for themselves, as the rules are not
>simple (or at least are not clearly written.) I have posted links to the
>FCC sections in the past [the hostname for the regs isn't obvious,
>unfortunately.]

Note I know of no one selling a watt in an 11g, but in a typical suburban
neighborhood at 2.4GHz, I have a hard time picturing the FCC cruising down
your street looking for transmitters that are 'too' strong. Thing is even
if your AP can reach the moon, can that card in your laptop signal back...
As you doubtless know (and I mention this for others who might be reading)
a chain is only as strong as the weakest link.

Were it me, I would prefer a really good antenna system to power (watts) in
the overall scheme of wireless networking with off the shelf equipment. I
don't think the AP reaching out and touching the NICs is a problem, I think
it is the other way around, the NICs reaching 'back' to the AP.

Archived from groups: alt.internet.wireless (More info?)

I don't think anyone is selling commodity homeuse gear transmitting at a
watt. In fact, immediately following table 115, the 802.11b standard
requires the following:

"Power control shall be provided for transmitted power greater than 100 mW.
A maximum of four power levels may be provided. As a minimum, a radio
capable of transmission greater than 100 mW shall be capable of switching
power back to 100 mW or less."

I believe most lowend manufacturers keep to 100 mW or less. This
accomplishes several things: a single manufactured device satisfies European
and North American transmitted power requirements, and requirements for
power switching are eliminated.

And, of course - as Walter pointed out - the requirements are actually much
more complex than simply a restriction on transmitter power. In the U.S., in
addition to the more complex formulas Walter mentioned, any device radiating
between 3 Khz and 300 Ghz must satisfy IEEE Std C95.1-1999 (also an ANSI
standard), which limits how much power a human operator is allowed to be
exposed to.

Based on some back-of-the-napkin calculations, I suspect that the power
density 1 foot away from a 100 mW transmitter exceeds the allowed maximum
just a little. Since this is a typical order-of-magnitude distance for
laptop users, I think most client cards produce less than that.

"Rico" <rico_001@hotmail.com> wrote in message
news:10802h39v4h8c28@corp.supernews.com...
> In article <c5nnej$v4$1@canopus.cc.umanitoba.ca>,
roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote:
> >In article <WbHfc.10387$xw3.571@newssvr23.news.prodigy.com>,
> >gary <pleasenospam@sbcglobal.net> top-posted:
> >:"Martin²" <never@give.one> wrote in message
> >:newsYGfc.33366$Y%6.4236080@wards.force9.net...
> >:> Power output is limited by regulations 200mW in Us,
> >
> >:Thats 1000 mW EIRP (1 Watt) in U.S.
> >
> >The details of the US FCC limits are more complex than that. They depend
> >on what kind of spread spectrum you are using, and they depend on
> >some other factor.s Say 1000 mw EIRP is a good first approximation
> >for typical 11b and 11g equipment.
> >
> >If, though, you are willing to reduce the output of your transmitter,
> >then for every 1 dBi you decrease the transmitter, you can increase the
> >gain on your antenna by 3 dBi -- thereby going over the usual
> >1000 mw EIRP limit.
> >
> >I would suggest, though, that anyone serious about getting the maximum
> >possible EIRP read the FCC regs for themselves, as the rules are not
> >simple (or at least are not clearly written.) I have posted links to the
> >FCC sections in the past [the hostname for the regs isn't obvious,
> >unfortunately.]
>
> Note I know of no one selling a watt in an 11g, but in a typical suburban
> neighborhood at 2.4GHz, I have a hard time picturing the FCC cruising down
> your street looking for transmitters that are 'too' strong. Thing is even
> if your AP can reach the moon, can that card in your laptop signal back...
> As you doubtless know (and I mention this for others who might be reading)
> a chain is only as strong as the weakest link.
>
> Were it me, I would prefer a really good antenna system to power (watts)
in
> the overall scheme of wireless networking with off the shelf equipment. I
> don't think the AP reaching out and touching the NICs is a problem, I
think
> it is the other way around, the NICs reaching 'back' to the AP.
>
>