OpenMoko/GTA01 project advice

Andreas Kostyrka andreas at kostyrka.org
Sat Jul 28 00:22:04 CEST 2007


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Nelson Castillo wrote:
> Hi.
> 
> We are starting a project and we will use a
> Neo GTA01 ( We are also waiting for it to ship :) ).
> We will need at least two more, but we need to try
> one first.
> 
> We need to:
> 
> * Make calls to send arbitrary data (We'd like to
>  use the GSM for data)
> * Record voice messages on the phone and send them to
>  another user (via GSM)
> 
> I have a few questions:
> 
> * Will we be able to use the GSM directly? I am new to
> this, and I'd like to know if we can make a GSM call
> (to other Neo) and send arbitrary data.

Yes and no. You cannot make a Voice call and send arbitrary data. You
can make a data call (so called CSD) and send arbitrary data. Trouble is
that this is clearly visible to the operator as the call is signaled
differently, so if you are trying to avoid data call costs, it's not
possible.

As a mental model, you can think of the Neo as an Linux/ARM based PDA
with an embedded GSM modem.

Andreas
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