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PICList Thread
'Where to find OEM CELLULAR PHONES'
1999\11\24@131949 by Gabriel Callao

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Hello,
       I am involved in a project in wich I have to transimit data that a
Pic micro gets, using a cellular phone. It is going to be used in trucks,
that travel several hundreds kilometers each day. I have assumed that, if I
want to "keep my system in a little box", the only way of doing this is
using a cellular phone. (I Know that a cellular phone may cover all the
territory the trucks go).
       So, first: does anyone know where to find OEM cell phones ?
       Second: Maybe I am wrong, and there would be another way of
transmiting data using another method. If so, I am open minded and am
listening!!!

           Gabriel.-


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1999\11\24@132410 by Dave VanHorn

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face
>         Second: Maybe I am wrong, and there would be another way of
> transmiting data using another method. If so, I am open minded and am
> listening!!!


CDPD   Not available everywhere, but "the way to go" if it is.

1999\11\24@133426 by Craig Lee

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face
Sierra Wireless makes a damn good CDPD product.

You could also look at RIM modules.  Again, not covered everywhere,
but supported throught the Mobitex network.

The only way to get coverage everywhere is by sending data over the
analog bandwidth of the cellular phone.  If communication is module
to module, you could knock some of the filtering off, remove
companding and get a bit better bandwidth performance.

JRC Canada built a bunch of modules for simultaneous voice and data,
but they didn't seem to take off to well.

Also I know where you can get some impressive 3 watt transceivers
and 1W handhelds for cheap that can be hacked.... spam_OUTcleeTakeThisOuTspamenlight.ca

Craig

> {Original Message removed}

1999\11\24@153956 by Quentin

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Do a search for GSM Modems. Did that a few weeks ago and come up with
quite a few links.
Sorry, I did not save any.

Quentin

1999\11\24@204821 by Gabriel Callao
picon face
What is CDPD ??

----- Original Message -----
From: Dave VanHorn <.....dvanhornKILLspamspam@spam@CEDAR.NET>
To: <PICLISTspamKILLspamMITVMA.MIT.EDU>
Sent: Wednesday, November 24, 1999 3:18 PM
Subject: Re: Where to find OEM CELLULAR PHONES


> >         Second: Maybe I am wrong, and there would be another way of
> > transmiting data using another method. If so, I am open minded and am
> > listening!!!
>
>
> CDPD   Not available everywhere, but "the way to go" if it is.


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Thousands of Stores.  Millions of Products.  All in one place.
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1999\11\24@214047 by Randy Glenn

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CDPD is Cellular Digital Packet Data.

-Randy
http://i.am/PICxpert - .....PICxpertKILLspamspam.....techie.com
ICQ Nickname: PICxpert - Fax: (208) 330-3630

{Original Message removed}

1999\11\24@223548 by William Chops Westfield

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CDPD is "Cellular Digital Packet Data."  The last time I paid attention, the
idea was to be able to utilize the "idle" "callspace" (necessary to ensure a
given response time in a cellular network) to send "cheap" packetized data.
The scheme was complex and full of then-current ideas of appropriate network
standards, and seemed to me to be doomed to chronic insufficient bandwidth
to do anything useful (and that was before the Internet's recent explosive
growth.)  I vaguely recall hearing that they've updated to more current
standards buzzwords (ie "ATM" replaces "TP4", or somesuch) and somewhat
higher bandwidth (but probably not high enough!)

Is it actually available ANYWHERE?  Can someone summarize it from a modern
user perspective?

Meanwhile, cellular rate structures have changed, and so have usage patterns
and importance of The Internet.  Lacking common availability and REALLY good
cost incentives, I would bet good money that you'd get a better solution
using off-the-shelf cell phones and cellphone modems.

BillW

1999\11\25@064400 by Pekka Ritamaki

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Gabriel,

I do not know USA, but rest of the world uses GSM-phones which are
available in many different forms
for OEM needs.

I use PIC +Nokia PC card II ( max. 44kbsp speed).
It is basically PCMCIA format GSM-phone with integral antenna. Add 5V
and PIC + program.
Very easy. I have done interactive Coca-Cola vending machines with
Nokia's PC CARD II.

Pekka

--
Û¼¡`¡¼Û¿,üü,¿Û¼¡`¡¼Û¿,üü,¿
Pekka Ritamaki, Probyte Oy Microprocessor software & hardware design
Nirvankatu 31, 33820 TAMPERE, FINLAND http://www.sci.fi/~pri
tel: Int. 358-3-2661885 fax: Int. +358-3-2661886 email:EraseMEprispam_OUTspamTakeThisOuTsci.fi

1999\11\25@083404 by Peter Keller

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Pekka
sounds good. Do you share your informations (exact gsm type, schematics,
code etc.) ?
Peter

Pekka Ritamaki schrieb:

{Quote hidden}

1999\11\25@103005 by Craig Lee

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Advantage of Sierra Wireless's product is it's ability to do circuit
switched data as well as CDPD, as well as faxing from your pc.  All
integrated
as a PCMCIA type 2 card.

>Lacking common availability and
> REALLY good
> cost incentives, I would bet good money that you'd get a better solution
> using off-the-shelf cell phones and cellphone modems.
>
> BillW

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