+ Post New Thread
Results 1 to 8 of 8
How do you do....it? Thread, Mobile phones in Technical; I'm sure I've read something like this here before but can't find it. Is there a device that can be ...
  1. #1
    kerrymoralee9280
    Guest

    Mobile phones

    I'm sure I've read something like this here before but can't find it. Is there a device that can be used in classrooms to block the mobile phone signals.

    I may be well off here but like I say I'm sure I've seen it somewhere.

  2. #2

    Join Date
    Jul 2006
    Location
    London
    Posts
    2,962
    Thank Post
    159
    Thanked 152 Times in 116 Posts
    Rep Power
    49
    Im pretty sure that jamming frequencies like that is illegal. But yes there are devices

  3. #3
    linkazoid's Avatar
    Join Date
    May 2007
    Location
    London
    Posts
    643
    Thank Post
    118
    Thanked 89 Times in 73 Posts
    Rep Power
    78
    you want to be looking for devices that work like a farday cage.

  4. #4

    elsiegee40's Avatar
    Join Date
    Jan 2007
    Location
    Kent
    Posts
    10,701
    Thank Post
    1,783
    Thanked 2,168 Times in 1,603 Posts
    Rep Power
    769
    Most of the threads I have seen have been along the lines of detecting kids phones using bluetooth, rather than about blocking phone signals

    If you block the phones, chances are your wifi and any cordless phones in school won't work too.

  5. #5

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,631
    Thank Post
    514
    Thanked 2,442 Times in 1,890 Posts
    Blog Entries
    24
    Rep Power
    831
    Quote Originally Posted by sidewinder View Post
    Im pretty sure that jamming frequencies like that is illegal. But yes there are devices
    Yep, blocking by using a jammer is illegal. However, blocking with some form of paint which blocks signals is allowed as far as I'm aware.

  6. #6
    Jona's Avatar
    Join Date
    May 2007
    Location
    Cranleigh
    Posts
    467
    Thank Post
    14
    Thanked 50 Times in 48 Posts
    Rep Power
    23
    I'm not entirely sure of the science but making a Faraday cage with paint, mesh or foil isn't that practical if you still want to have windows.

    Car's are pretty good faraday cages but you can still use phones inside them...

    Other signals such as mobile phone signals penetrate the skin of cars and aircraft because the wavelength of the signal is significantly smaller than the holes present on the surface of the conductor (the windows).
    Ref: http://en.wikipedia.org/wiki/Faraday_cage

    Also if you did manage to achieve this it will probably break any wi-fi (or at least restrict it to one side or other of the cage)

    Cheers
    Jona

  7. #7

    dhicks's Avatar
    Join Date
    Aug 2005
    Location
    Knightsbridge
    Posts
    5,621
    Thank Post
    1,239
    Thanked 777 Times in 674 Posts
    Rep Power
    235
    Quote Originally Posted by kerrymoralee9280 View Post
    I'm sure I've read something like this here before but can't find it. Is there a device that can be used in classrooms to block the mobile phone signals.
    I bet it would be a lot easier to make a device to simply detect a mobile phone signal... Hand-held maybe, or an arch in the doorway, or ceiling mounted like a CCTV camera?

    --
    David Hicks

  8. #8
    enjay's Avatar
    Join Date
    Apr 2007
    Location
    Reading, Berkshire, UK
    Posts
    4,485
    Thank Post
    282
    Thanked 196 Times in 167 Posts
    Rep Power
    75
    Quote Originally Posted by elsiegee40 View Post
    Most of the threads I have seen have been along the lines of detecting kids phones using bluetooth, rather than about blocking phone signals
    Only works if a) the phones have b/t, b) it is enabled, and c) the phone isn't hidden. I always have my b/t turned on so my phone can connect to the hands-free in my car, but it is hidden so searches for b/t devices won't find my phone.

SHARE:
+ Post New Thread

Similar Threads

  1. Unlocking mobile phones
    By edie209 in forum General Chat
    Replies: 12
    Last Post: 24th December 2009, 12:05 AM
  2. Transferring data between phones
    By crc-ict in forum General Chat
    Replies: 1
    Last Post: 14th February 2008, 09:20 AM
  3. Mobile Phones - Suggestions?
    By acrobson in forum Hardware
    Replies: 48
    Last Post: 9th January 2008, 09:56 AM
  4. Detecting Mobile Phones for Exams
    By Disease in forum How do you do....it?
    Replies: 23
    Last Post: 13th December 2007, 05:19 AM
  5. Skype phones
    By FN-GM in forum Hardware
    Replies: 10
    Last Post: 1st August 2007, 02:37 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •