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mobile phone as phone line for computer modem

Discussion in 'Hobby Electronics' started by Polt, Apr 28, 2012.

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  1. Polt

    Polt Guest

    I have a modem card in a computer which is able to establish a dialup
    connection to an ISP when connected to a landline.

    Is it possible to substitute a mobile phone for the landline?
  2. Rod Speed

    Rod Speed Guest

    Its possible, but the speed is completely fucked.

    You can get a very decent net service via
    wireless with all the mobile telcos, even 3.
  3. The short answer... No.

    The long answer... No, not in the fashion you're wanting to do it in.

    The solution is to enable Wi-Fi tethering in your 'phone (if it's capable of
    that - I know all Android 2.4+ 'phones are able to do it; not sure about
    others), and connect the computer to the 'phone using Wi-Fi.

    If your 'phone doesn't do Wi-Fi tethering and/or your computer doesn't have
    a Wi-Fi adaptor, you can use USB tethering - basically a lower-tech version
    of the above.

    Once connected, you'll be using your 'phone 3G (or EDGE) data and your
    computer'll behave just as if it was connected directly to an Ethernet
    port - no dialling required.
  4. Rob

    Rob Guest

    Yes is the correct answer. My daughter was doing this, where she had
    her mobile connected to a PC by a cable. (The Telstra sim she used was
    free to Bigpond.)
  5. I'd really love to hear how she managed to get the cellular network to
    transmit the QAM signals produced by a dial-up modem, given the bandwidth
    requirements of the latter which the former simply doesn't, by design,
    support. This of course before we even start contemplating the inability
    (and indeed unwillingness) of a mobile 'phone to accept DTMF tones to
    initiate dialling.

    You'll have to forgive my naive curiosity in this regard; I'm merely an
    electronics engineer with only a little over three decades' experience in
    the computing field.

    Had you said "my daughter used her 'phone as a modem," I'd most humbly have
    nodded my head in agreement - but what you're proposing is simply impossible
    based on my training and experience.
  6. Petzl

    Petzl Guest

    Some older phones allowed a very slow unreliable connection to
    Internet (just a friend of mine once set it up but ridiculously slow
    and not even good for email)

    Best to try a USB "Dongle" or
    When I tried Vodafone I ended up sending dongle back just didn't work
    they claimed to much congestion (I don't trust them they seem a scam)

    For my Android tablet I used Amaysim prepaid data (12 months 10 gig
    for $100, speed varies from where you are norm is around 2Mb/s)
    You will still need a Optus Dongle to accept Sim Card (Android sim
    card plugs into computer) Caltex service station sell Sim Cards $2

    Problem with Telstra is they don't seem to want to be in communication
    for individuals (prices not in reality or competitive)
  7. Polt

    Polt Guest

    The modem connection created by attaching a phone to a computer via USB
    actually acts in the same way as a normal modem except that it calls a
    service number (usually *99#) instead of a modem dialup number. All you
    have to do is change that number to an ISP dialup number and the connection
    will operate as aq dialup connection.
  8. Rod Speed

    Rod Speed Guest

    He's just mindlessly splitting hairs about how its done.
    It is viable for email without any attachments.
    Or one of the wifi wireless routers.
    They did go thru a patch of an utterly obscene level of service
    because they couldn't come even close to keeping up with demand.
    Corse they do.
    While they are a bit higher than the competition,
    they also have the best wireless network too.

    The prices arent too bad.
  9. Rob

    Rob Guest

    Is there a modem in the old phones?

    I'm not exactly sure of the exact details of how. She took the free sim
    and placed it into her Nokia phone, and the cable plugged into the
    bottom of the phone, this was then connected to the PC. If I was to get
    the PC back and have a look just to see what hardware it had I would
    most likely have a better idea. She had no landline and the mobile gave
    quite a good result.

    I wonder if the mobile connected to bigpond and the signal went via usb
    to the PC??
  10. Rod Speed

    Rod Speed Guest

    He's just mindlessly hair splitting/posturing, as always.
    The phone just fakes up a modem so the comms app is happy.
    Most phones can do that. The connection speed is pathetic.
    Yes it did, or to the telco the sim was provided by, anyway.
    Nope, just the data.
  11. Petzl

    Petzl Guest

    When first connected I got reasonable speeds then a month later (after
    30 day "guarantee") it became rubbish. A number of others report the
    same fiasco.
    Not really although they are not the only ones. Why won't they allow
    Naked DSl? as a instance, looking into getting a data only Sim card
    they want all my phones (mobile & home) Internet all at obscene
    millionaire pricing.
    Well I haven't tried their Sim data pricing lately (5 months) but they
    were not even a quarter of what I got through Amaysim (Optus carrier).
    I did shop around no one in Telstra know their product except the
    "Customer Service" manager you waste your time talking to anyone else!
    Give up if you can only get the Philippines
  12. Jasen Betts

    Jasen Betts Guest

    you can make ISDN calls using many GSM phones, the phone looks like a
    modem to the pc. most dialup ISPs will accept ISDN calls.
  13. USB, yes. RJ11 'phone port, no.

    You're suggesting using the 'phone as a modem - which is easily

    Connecting a mobile 'phone to a dial-up modem in a computer, however, is
  14. ^^^ What he said.

    The first 'phone I had which could function as a modem was a Philips Spark,
    circa 1997 - which was incidentally also the first GSM 'phone I had.

    Assuming you have the ('phone) modem driver installed, your computer will
    see the 'phone as a modem and use it as such.

    I'd strongly advise against it though, as even the slowest GPRS or EDGE
    connection will out-perform dial-up via ISDN.
  15. Rod Speed

    Rod Speed Guest

    Yeah, absolutely classic example of what can happen when you
    don't have enough capacity and aggressively promote the service
    so you end up with so many new customers that you cant handle
    them all properly because you never had enough capacity to do that.

    It was never clear if those with a clue had warned about that problem
    and were just ignored or whether even those didn't realise the problem
    until the shit had hit the fan very spectacularly indeed.
    Corse they do, they've been flogging those white prepaid sticks
    and the wifi routers for years now. They're available in all the
    retail outlets like the post office, hardly normal, big W etc etc etc.
    Because they make a hell of a lot of money on line rent, stupid.
    No they don't. You just cant understand some of their offerings.
    That's just plain wrong. One of their offers isnt any more
    expensive than DSL. Its just got the major disadvantage
    that it just charges you more once you exceed the quota
    rather than just crippling the service speed wise.
    But they arent anything like that much cheaper than dodo, optarse themselves
    etc etc etc.
    Some of the operations like the franchised telstra shops do have a clue.

    It would have been cheaper for the turks, but they had already
    had to cancel the broadband service twice because one of the
    stupid kids grossly exceeded the quota and produced an utterly
    obscene bill, so they needed a service that would just cripple
    the performance of the service and not affect the amount they
    paid. So I put them on a DSL service instead even tho they didn't
    need a phone service at all because they all use the mobile service
    that gives free calls between all customers of the mobile service and
    25c untimed national calls to both landlines and mobiles nationally.
    That's MUCH cheaper than a landline voice service.
  16. Rod Speed

    Rod Speed Guest

    It isnt an ISDN call.
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