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Wireless Networks Thread, Managed Wireless Systems in Technical; Our sister company T James Wired And Wireless Communications are a extricom specialist so if you would like some more ...
  1. #31

    CPLTD's Avatar
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    Our sister company T James Wired And Wireless Communications are a extricom specialist so if you would like some more information or a free demonstration send me a pm with your contact details and I we can help you further,

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    Quote Originally Posted by dhicks View Post
    In particular, does anyone know if the Sputnik system can handle the "high-volume" traffic that we gets in schools, i.e. 30 odd laptops in a classroom all trying to work at once? How do other systems handle this issue - do they simply reduce the power on each access point, reducing the interference between access points (but requiring more access points around the place, of course)?
    Have you tried speaking to Ivan Dimitrov who is mentioned at Sputnik Blog Boston University, United Kingdom to see how his implementation of Sputnik works?

    Most managed systems will cleverly fiddle with the power and channel so that they don't interfere with adjacent APs. If there is an area that you know will not be heavily used by mobile users you would have a low density of APs whilst in areas that have laptop trolleys and people hammering the wireless, you would increase the density of your APs.

  3. #33

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    Ruckus will talk straight back to AD no need for a Radius server!

  4. #34
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    RE: Extricom

    Quote Originally Posted by maniac View Post
    If you have two transmitters close to each other, the system will load balance between them by forcing transmissions from different devices to be sent/received by a specific transmitter
    That's what a 'traditional' (Cisco et. al.) managed wireless system does. It works because the APs within range of each other are on different channels. So if I have 30 laptops and they are in range of 3 APs most of the laptops will connect to the closest AP but some will also connect to the other two APs because even though they are further away and subject to more noise (i.e. lower speed) overall throughput will be higher because they are balanced. The management system figures all this out.
    (OP: This is a main advantage of a managed solution. If it's not managed all the clients will connect to the loudest AP even if there are other APs within range that could be used to balance the load.)

    maniac: What I don't understand is how this can work if all the APs are on the same channel. Remembering that channel is just radio frequency and 2 aerials within range of each other transmitting on the same frequency will cause interference.
    If I have 30 laptops in one room within range of 3 AP/transmitters all on the same channel even if the laptops are balanced between the transmitters surely their transmissions are going to interfere?

    This is a very interesting system Maniac - I'm just trying to get my head round how it works!

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    If all the previous replies have confused you speak to the boys from Cisco, we had them in to explain and demonstrate their wireless gear. It was then installed by a contractor and any problems were overseen by Cisco. we now have a brilliant 802.11n wireless system managing up to 1000 laptops with no problems.

  6. #36

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    eean, the way some of these systems work is by the antennae being completely dumb. They just transmit radio waves, like a remote antenna. All the work is on the unit they connect to. So in fact, the 'AP' is actually the management unit, and not the antennae.

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    Trojan's Avatar
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    I was also very impressed with the Extricom wireless system when we had a demo here, they also used a couple of VOIP handsets and we could actually see the signal moving between the dumb AP's.

    The guy even unplugged a couple while we were talking and the signal didn't miss a beat, no drop at all.

    It was however very expensive (£20k) compared to other systems and we couldn't justify it.

    We went with a colubris system in the end which is ok, but nowhere near as good as the Extricom would have been.

  8. #38

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    If you are worried about signal drop out forget Cisco and go for Ruckus!

    The signal is so strong and very very reliable, its so strong the system can see 10 rouge AP's which happen to be people living around the school!

    I saw the guys from Net-Ctrl at BETT and their one Ruckus AP was out performing all the others at the show!

    It had a constant db of at least 60, the rest were all dropping out!

  9. #39
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    Quote Originally Posted by adurrant View Post
    I saw the guys from Net-Ctrl at BETT and their one Ruckus AP was out performing all the others at the show!
    Right now I'm only going to be trialling wireless in one room, however I'm sure the powers that be will soon be asking me to extend coverage.

    In this thread there seems to be a number of offerings recommended, but just as an example, is it feasable for the single room coverage to start off with a single unit from Ruckus and then extend it? What sort of price is a single unit?

  10. #40

    john's Avatar
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    With the Ruckus system you can start small and build up but it does cost you more. You really need to know if they will expand from that one room, if its only ever going to be that 1 room with never any more than I'd got for a couple of APs without posh management stuff, but if its going to expand start as you mean to go on. High initial price for the first few rooms but soon becomes cheaper once you've got going.

  11. #41
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    Ruckus Wireless for Schools

    Hi

    We would welcome the chance to talk to you about your school, your network and what it is you need to deliver to your users and Governors.

    Please contact us at Net-Ctrl on 01473 281 211 or aggy@net-ctrl.com.

    We have various ways of introducing you to Ruckus Wireless, but why not have a search on this forum under Ruckus or Net-Ctrl.

    Kind regards
    Net-Ctrl





    QUOTE=dhicks;218904]Hello All,

    Managed wireless systems. I want one. How do they work? How can I make one? Specifically, what is it about a "managed" wireless solution that makes it cost £10,000 upwards, whereas just buying access points enough to cover our school would cost around £2,000? I've had a look at the websites for a couple of systems, which tend to be a little woolly on the detail side of things, but a "managed" wireless system seems to mostly consist of a central combined server/PoE switch and a bunch of access points. The access points don't generally seem to need to be plugged directly in to the server, although it seems that sales types will cheerfully try and flog you extra servers.

    So, basically, a managed wireless solution is a server that manages a bunch of access points. Is the Sputnik system suitible for use in schools - does anyone else use this system? This system would seem to consist of just access point, managed by a central server that is an application running on top of a CentOS Linux distribution - something I could just plonk on our existing system as a VM, no need to get extra bits of hardware or anything.

    In particular, does anyone know if the Sputnik system can handle the "high-volume" traffic that we gets in schools, i.e. 30 odd laptops in a classroom all trying to work at once? How do other systems handle this issue - do they simply reduce the power on each access point, reducing the interference between access points (but requiring more access points around the place, of course)?

    --
    David Hicks[/QUOTE]

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    I have read various threads regarding wireless systems. We are looking to upgrade our site wide netgear wireless solution for a new one. Currently we have been recommended either Extricom or Meru. Can any of the three systems that have been discussed (Extricom, Meru, and Ruckus) support minimum of 250 wireless laptops spread over 13 buildings. We will be having in the future areas of 60-90 laptops in the same location. Ideally, we want the speed to be as close as wired as poss, so we are considering n for the clustered areas. Any thoughts?

  13. #43

    CPLTD's Avatar
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    Quote Originally Posted by sentinelprime2009 View Post
    I have read various threads regarding wireless systems. We are looking to upgrade our site wide netgear wireless solution for a new one. Currently we have been recommended either Extricom or Meru. Can any of the three systems that have been discussed (Extricom, Meru, and Ruckus) support minimum of 250 wireless laptops spread over 13 buildings. We will be having in the future areas of 60-90 laptops in the same location. Ideally, we want the speed to be as close as wired as poss, so we are considering n for the clustered areas. Any thoughts?
    Ruckus ,Meru ,Extricom would have no problem with this at all,

    If you would like to pm me your details We can provide you info and pricing on all these solutions as we are partnered with them

    p.s we have buy one get one free on N at the moment but its ending this month so hurry hurry!
    Last edited by CPLTD; 8th December 2009 at 11:50 AM.

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    CPLTD's Avatar
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    was great speaking with you fella and look forward to working with you

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