Re: PDA + Cell Phone
While not strictly PDA - I think the subject matter is still perfectly
relevant to this list. Laptops need mobile connectivity too.
My experience(s) don't relate to a single device, but I would advise you
against going that route in any case - more on that later.
I've used gprs over bluetooth with my cellphone. It worked just fine,
although it was nothing like broadband speeds - which I have apparently
become quite accustomed to. Configuring bluetooth under linux is a little
tricky (or was at the time) just because getting BlueZ or Affix to work
well is a little confusing - a few levels you have to initiate manually
before bringing the (in my case) ppp up. I'll be happy to help you
diagnose anything if I can remember how :)
As far as integrated device - I would advise against this because they
traditionally aren't as powerful as their separate counterparts.
Take the nokia n-gage (which a newer model was just announced for) -
cellphone and game system... in most opinions doesn't do either
signifigantly well.
Another device is the Danger Sidekick (Tmobile hiptop [I might have
those reversed]). This I have to admit is a very slick device - and you
get better performance since everything is proxied and their servers do a
good job of stripping out the useless bits - but you're limited with the
usability. You can't use the device as a modem like a normal cellphone -
if, for example, you had your laptop handy and wanted to get online with
it. You can't use the device without a proxy - and the SDK (I believe it
was finally released) isn't much good because you can't get the program on
the phone without a bunch of hoops.
irda works fine as well, but it's a pain lining things up - bluetooth is
nice because it's low power (unlike 802.11b) and works well once devices
are paired. Speaking of power - if you just want to talk to someone on
the phone you're burning your PDAs battery - and if you just want to use
your PDA you're burning your phones battery... nor can you just take one
with you somewhere...
I've got a bluetooth cf card on order from amazon (ambicom)
that I'll be trying out the pda game with. I'll let you know how well it
works if you're interested.
Sincerely,
-Martin Norland
On Wed, 14 Apr 2004, James wrote:
> Hello all,
>
> Has anyone attempted to use a single device for both cellular, (pstn
> switched)
> phone calls and VoIP aka sip (flat-rate)? What I'm thinking of is a PDA
> with GPRS capabilities. There are (OEM) GSM/GPRS modules that are
> capable of both. There are also reasons to have a Cell phone and a PDA
> as compatible devices. I guess the best idea it to start working form a
> platform that runs embedded linux and is 100% sourcecode available.
>
> Maybe a wearable compujter, with 2 ports, one for cellular, one for GPRS?
>
> Any ideas? I was going to use Tmobile as the guinny_pig, as they are
> GSM&GPRS. The GPRS is flat rated at 30.00/mo. here in the US.
>
> All input is most welcome. including latency issues.
>
>
> James
>
>
>
>
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