[c-nsp] Re: Question about Cisco AIR-AP 1200 series access point?

[jordi]

Hi,

Thanks for your information.

I am going to use AIR-ANT4941.



> Hi All,
> 
>        1     Simple and sweet is Cisco recommends about 20 - 24 users
> for optimium performance per AP.
>         2     There should be only about 10 - 12 % area for ovelapping
> channels so that the connection is not lost in case of movement, hence
> seamless movement.
>               
> 3 Check around for wiring , thick glass, pillars or other reflecting
> or refracting things.
> 
> 4 Since this will be in bound deployment , try and reduce the AP
> Transmit power to abt 30 mW, and on Cards to about 5 - 10 mW.
> 
> 5 Also let me know what antennas u have , i will let u know the right
> design as well. :-) .........
> 
> Regards
> Raj
> 
> \"Easiest way to grow is ,help others\"
> 
>  
> 
> 
> 
> On Fri, 11 Feb 2005 13:30:49 +0000, Ryan O\'Connell
> <ryan at complicity.co.uk> wrote:
> > On 11/02/2005 11:42, jordi wrote:
> > 
> > >I am not sure How many users can be supported concurrently? I am working on a project with more than 100 people in one floor. How many APs should be needed?
> > >
> > 
> > For 100 people on 802.11b/g, you will need quite a few APs if you want
> > to come even close to reasonable office performance. With that many
> > users, personally I\'d be looking somewhere in the region of at least 5
> > APs - ideally 802.11g - but so much depends on local conditions (E.g.
> > lift shafts can cause reception blackspots, IT staff tend to use more
> > bandwidth than a receptionist...) that it\'s hard to give a definitive
> > answer.
> > 
> > Assuming you\'re in China as your signature suggests, you\'ll have 11 or
> > 13 channels available to you but they overlap so you can only use 3 at
> > once - 1, 6 and 11 - so installing three APs is quite easy. Beyond that,
> > you need to start thinking very carefully about the local layout - if
> > people are spread out over a large area, you can put radios on the same
> > frequency at opposite ends of the area. 100-200m between radios on the
> > same frequency in an office area is a good rule of thumb if you\'re using
> > 50mW TX power and an omni aerial. You *could* squeeze in more APs by
> > reducing the TX power on them, but unless you can guarantee that the
> > clients will also run at a reduced power you\'ll run into lots of
> > interference problems.
> > 
> > 802.11a has more channels available so it\'s much eaiser to do things
> > such as you describe - however, the range of 802.11a is shorter so more
> > APs may be needed.
> > 
> > When working out bandwidth, don\'t forget it\'s a shared medium like
> > unswitched Ethernet, so you\'ll never see annywhere close to 11Mb/s from
> > 802.11b. You can get anything from 2Mb/s up to about 5Mb/s depending on
> > the quality of the equipment - Cisco-to-Cisco generally gives the best
> > performance.
> > 
> > --
> >         Ryan O\'Connell - CCIE #8174
> > <ryan at complicity.co.uk> - http://www.complicity.co.uk
> > 
> > I\'m not losing my mind, no I\'m not changing my lines,
> > I\'m just learning new things with the passage of time
> > 
> > _______________________________________________
> > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
> >
>

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