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1 KM Wireless Networking

Discussion in 'Networking Issues' started by digimart, Sep 15, 2005.

  1. digimart

    digimart Guest

    I want to hook up my office with my home. The distance between these 2 points is 1 Kilometer. There is absolutely nothing between these 2 points and is open & barren land but belongs to somebody else; so I cannot lay a Fibre between these 2 points & neither can I put a WRE54G between these points to hop the wireless signal !!

    Can anybody guide me as to what Linksys Wireless Access Points or Routers can I install at both the ends to make this happen??
     
  2. Chorlton

    Chorlton Network Guru Member

    I think a kilometer is pushing it a bit. Have you considered line of sight or some kind of dial in solution. What are you wanting to achieve by connecting home to office?
     
  3. BlueSkye

    BlueSkye Network Guru Member

    I participate in a community wireless network and we have working links several miles distant between nodes. Good line of sight (no foliage, structures, or other obstructions in the path) is a requirement, but beyond that, common 802.11b WiFi gear can go the distance.

    There are a few tricks. First of all, we are generally using 200 mW Senao PCMCIA or miniPCI radios that have a connector to install an external antenna. I am unsure what power the Linksys radio is, but I'm sure it's lower power. I'm going to guess maybe 30 mW. That lower power will make it considerably harder to make links across longer distances.

    One node will have to be in "AP mode" and the other node will have to be in "client mode". the standard WRT54G operates in AP mode only, but there are hacks for the WRT which allow the user to operate the device in client mode.


    Perhaps your biggest obstable may be the low power of the Linky radio But low power radios are greatly helped by attaching them to high gain directional antennas. Right now, I am running a 4 Mbit/s. throughput link about a mile using a pair of Senao 200 mW radios and a pair of 14 dBi panel antennas. Though I have not tried to use the low power LinkSys radios in this sort of application, it is possible you could make it work by upping the antenna gain to compensate for the low radio power by using, say, 24 dBi gain parabolic antennas.

    For testing purposes, perhaps the easiest thing would be to identify which of the two rubber-duck antennas on the Linky is the primary antenna antenna (as opposed to the diversity antenna) and unscrew and remove the rubber-duck antenna. Then you could purchase a "pigtail" that would mate to that exposed connector and the other end of the pigtail would mate (usually to an N-type connector) to a high gain directional antenna. You would need similar rigs at both ends of the link to be able to effect a wireless link.

    Please don't use this message as a "design guide". There are many factors that enter into a proper wireless link and I don't know enough about your specific situation to specify them all, but I can say that a 1 km. wireless link is a piece of cake with the right wireless hardware and equipment.

    Wireless netorking of this sort is not for the faint-hearted, but it is being done in wireless community networks around the globe with considerable success.

    If you are interested in learning more about what AlamedaWireless is doing, I can refer you to our website:
    http://www.alamedawireless.org

    and I strongly encourage you to explore SeattleWireless' site at:
    http://www.seattlewireless.net
    They have a wealth of helpful information on setting up wireless links.

    Happy unwiring!


    BlueSkye
     

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