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    Use WWAN and WLAN at the same time?

    Discussion in 'Lenovo' started by ameshrimp, Apr 5, 2008.

  1. ameshrimp

    ameshrimp Notebook Enthusiast

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    Can you use WWAN and WLAN at the same time?


    After Fn+F5, when I power on WWAN, the WLAN radio will be powered off automatically. Same thing happens when turning on the WLAN.
    The bluetooth radio is always on unless powered off mannually.

    Is this normal? How can I turn on both WWAN and WLAN radio

    Thanks!


    T61 14" WXGA widescreen 7658-CTO
    WWAN: Verizon EV-DO (Sierra)
    WLAN: Intel 4965AGN
    Core 2 Duo T7250
    Integred Graphics Card
     
    ameshrimp, Apr 5, 2008
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  2. Renee

    Renee Notebook Virtuoso

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    It is normal.

    I've always thought the reason for this was that you can't have two IPs at the same time?
     
    Renee, Apr 5, 2008
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  3. ameshrimp

    ameshrimp Notebook Enthusiast

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    I called Lenovo tech support and they told me the same thing.

    But I don't think it is the right explanation. Since I can use wired gigabit network together with WLAN or WWAN.
    Looks like Sony designs this same way:
    http://forum.notebookreview.com/showthread.php?t=99254

    Maybe it's about radio interference?
    Thanks Renee, at least I know that mine is not defective.
     
    ameshrimp, Apr 5, 2008
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  4. xwred1

    xwred1 Newbie

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    There are legitamate reasons to use both I would think. What if the wifi was only for a lan, for example, and you needed wwan to go online but still wanted to use lan resources? That seems like a pretty reasonable situation.

    There shouldn't be radio interference because they use different frequencies.
     
    xwred1, Apr 5, 2008
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  5. techboydino

    techboydino Notebook Evangelist

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    agreed. many computers are setup wired with more than one nic. my servers all have at least 2 or 3 nic cards. the gateway address is what tells the OS which nic to use for what traffic. in theory, you should definetely be able to use both. WWAN and Wifi are not even close to the same freq. worth looking into.
     
    techboydino, Apr 5, 2008
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  6. Renee

    Renee Notebook Virtuoso

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    "There are legitamate reasons to use both I would think. What if the wifi was only for a lan, for example, and you needed wwan to go online but still wanted to use lan resources? That seems like a pretty reasonable situation."

    Are you aware of what an enormous security hole this presents?

    You have network security and someone can plug into a lan and also anything they want on the net in an uncontrolled fashion.

    I can't run my WWAN when I am connected to an ethernet.
     
    Renee, Apr 6, 2008
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  7. mikec

    mikec Notebook Evangelist

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    "Security holes" are in the eye of the beholder, and has absolutely nothing to do with running WLAN and Local/wireless LAN at the same time. A properly configured network and endpoint security can address this.

    It should not be either/or - bad design by Lenovo.
     
    mikec, Sep 9, 2008
    #7