Check modules from sonyericson
http://www.sonyericsson.com/spg.jsp?cc=se&lc=sv&ver=4002&template=pp1&zone=pa&lm=pa1&cid=140
many models to choose from.
Regards,
Viron.


amerdsp wrote:
> I am looking for the smallest GSM/GPRS/EDGE modem for use in a project?
>  In the US, I found one by Multitech, but I am not sure how it pairs to
> others if there are any that are easily available to OEM designers in
> the US.
> 
> Any ideas?
> 
> Thank you.
> 
> A

> Apologies for the multiple posts.. browser hung....
> 
> Leon, thank you for all the valuable info, but i just found out that
> the evaluation kit for the MC55 is expensive.  Can one do without it or
> is it a must have?
> 
> A
> 

I'd say no. Just a matter of hooking up serial lines and 2 control wires 
for modem start up / power down (if IO is at premium you can even get 
away without them, although they are useful) and SIM card. If you want 
"higher level integration" then that offered by Siemens module itself, 
you can look at falcom (www.falcom.com) embedded modules. Internally 
they have MC55 (at least some of them do). Falcom also offers terminals 
based on MC55 - in case you want to take it apart and look at the 
signals (as for possibility of hooking up to them that's another 
question ;-)

Just keep in mind that MC55/56 does not have EDGE, only GPRS class 10, 
thus upload speed will be 2 uplink slots at max (with local networks the 
best transfer I was able to get was about 2-3kbps with MC39i - also GPRS 
class 10). If you want EDGE, you'll need to go with MC75.

Maciek.

Sawik wrote:
> > Thank you for the prompt reply.  Which MCU are using with it?  What I
> > will be doing is to try to send images to a server over EDGE or GPRS.
> > I am trying not to make a mistake and buy components that end up not
> > working together.
> >
> > Any suggestions/pointers will definitely help.
> >
> > Best,
> >
> > A
> >
>
>
> If you want to use GPRS/EDGE, "any" MCU will do as long as it will have
> PPP/IP stack, preferably fast serial port or USB Host. Another approach
> you could look into is choose a module with built in IP stack (accessed
> by AT commands). That way no PPP/IP required for MCU. I think MC75 will
> do the job in that case.
> For one of my projects I've used Zilog's eZ80 and it works pretty well.
> 

The MC55 has a TCP/IP stack.

Leon

amerdsp wrote:
> Apologies for the multiple posts.. browser hung....
>
> Leon, thank you for all the valuable info, but i just found out that
> the evaluation kit for the MC55 is expensive.  Can one do without it or
> is it a must have?
>
> A

You just need one of the modules (68 GBP), and a PCB for it, like the
one I described.

Leon

Maciek,
  Thank you for your input.  Yes, the reason I chose the MC55 (also has
a built in TCP/IP stack) is because it is small in size , an important
requirement.  I am sure any MCU will work.  I am pondering what is the
best way to go since I need to do image compression from an image
sensor before I send over GPRS/EDGE.

Apologies for the multiple posts.. browser hung....

Leon, thank you for all the valuable info, but i just found out that
the evaluation kit for the MC55 is expensive.  Can one do without it or
is it a must have?

A

> Thank you for the prompt reply.  Which MCU are using with it?  What I
> will be doing is to try to send images to a server over EDGE or GPRS.
> I am trying not to make a mistake and buy components that end up not
> working together.
> 
> Any suggestions/pointers will definitely help.
> 
> Best,
> 
> A
> 


If you want to use GPRS/EDGE, "any" MCU will do as long as it will have 
PPP/IP stack, preferably fast serial port or USB Host. Another approach 
you could look into is choose a module with built in IP stack (accessed 
by AT commands). That way no PPP/IP required for MCU. I think MC75 will 
do the job in that case.
For one of my projects I've used Zilog's eZ80 and it works pretty well.

Maciek.

Thank you for the prompt reply.  Which MCU are using with it?  What I
will be doing is to try to send images to a server over EDGE or GPRS.
I am trying not to make a mistake and buy components that end up not
working together.

Any suggestions/pointers will definitely help.

Best,

A

Thank you for the prompt reply.  Which MCU are using with it?  What I
will be doing is to try to send images to a server over EDGE or GPRS.
I am trying not to make a mistake and buy components that end up not
working together.

Any suggestions/pointers will definitely help.

Best,

A

amerdsp wrote:
> Thank you for the prompt reply.  Which MCU are using with it?  What I
> will be doing is to try to send images to a server over EDGE or GPRS.
> I am trying not to make a mistake and buy components that end up not
> working together.

PIC 16F88. I'll be using a 16F690 on the production version as I will
need some more I/O.

Leon