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Conference noted::wireless_lans

Title:RoamAbout Wireless LANs
Moderator:IROCZ::SCHWARTZ
Created:Wed Feb 17 1993
Last Modified:Fri May 16 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:348
Total number of notes:1173

346.0. "If breezecom can why cannot we?" by STKHLM::WEBJORN (Gullik Webj�rn Network Advisory) Wed Apr 16 1997 11:35

    What is the story on RoamAbout 2400 XX regarding external antennna?
    
    Upgrade communictions sell BreezeCom SA-10D and AP-10D 2.4 Ghz
    units WITH external antenna capability. This means that they have
    managed to get past the European Union Bureaucrats regarding
    ETSI standardisation, which was the obstacle trying to sell
    extended range wireless LAN's on the Euro market.
    
    As far as I know, the apropriate ETSI standard prescribed a maximum
    ERP ( effective radiated power ) rendering all attempts to increase
    range by focusing the RF or using more efficient antennas unlawful
    or at leas in the gray zone...
    
    They claim to have passed certification, so rules ( or interpretation)
    must have changed.
    
    What are we Digital doing? 
    Are we coming out with units + directional antennas in Europe?
    
    
    
    Btw, 
    
    Breezecom states 3 Mbit/sec top speed, fallback to 1 / 2 Mbit, 
    longer range when run 'barefoot', and now external antennas.
    
    Please comment....
    
    Gullik
T.RTitleUserPersonal
Name		DateLines
346.1It's coming....IROCZ::SCHWARTZMon May 05 1997 18:5214
    Hi Gullik,
    
    We are currently working with an antenna company in the UK to productize
    a building to building solution.  It requires a very specialized
    antenna in Europe as there is a limit on the transmit power of 100mW
    which won't go far.  This antenna vendor has a specialized antenna that
    has high gain on the receiver and low gain on the transmit side.
    
    This antenna vendor is going through the regulatory issues to get
    approval in the ETSI countries.  We are hoping to be able to ship into
    Europe in July-August timeframe.
    
    Regards,
    Jeff
346.2It can be done easily and cheapelySTKHLM::WEBJORNGullik Webj�rn Network AdvisoryWed May 14 1997 08:2916
    
    
    	It seems that what Breezecom have done is to reduce the power from
    100 mW with the same amount of dB as their antennas give. That way the
    EIRP is constant, and they pass ETSI certifications. The gain of the
    path is on the receive side, where they have matching little beams.
    
    This limits the modifications to REDUCING power output, adding a
    connector and certifying the whole rig.
    
    
    Gullik
    
    P.S. they claim 5 km ( 3 miles )
346.3We too will have it in the July timeframe.IROCZ::SCHWARTZWed May 14 1997 13:0010
    Hi Gullik,
    
    Yes, that is true.  As I mentioned we too will have a product in the
    July timeframe.  Our Txd gain will be in the area of +3dB and the RxD
    gain will be +12dB.  This should get us between 3 and 5Km.
    
    And no matter who little the change is, it still requires a regulatory
    approval, which unfortunately takes time and energy.
    
    Jeff