Recommendations for tiny GSM module?

Hello! I've been wanting to design a phone for a while -- and I'm
looking for recommendations for tiny quad-band GSM modules for
embedded projects. These things have started turning up for machine-to-
machine (telemetry) applications and the like over the past few years.
In particular, the Telit series of modules (sparkfun.com) and the
motorola G24 both look awesome.

Currently, some of the Telit ones (such as the GE864-PY) are smaller,
but the motorola one accepts digital audio in (which is nice, because
I can preprocess the voice audio). Can  anyone else recommend embedded
modules similar to these?

Thanks,
    ...Eric

Hi,

> Currently, some of the Telit ones (such as the GE864-PY) are smaller,
> but the motorola one accepts digital audio in (which is nice, because
> I can preprocess the voice audio). Can  anyone else recommend embedded
Telit also suupports digital audio.

There are also modules from Siemens (see 
https://pia.khe.siemens.com/index14287.htm)

Best Regards
AK

On Feb 26, 1:35 pm, AK <ark...@gazeta.pl> wrote:
> Hi,
>
> > Currently, some of the Telit ones (such as the GE864-PY) are smaller,
> > but the motorola one accepts digital audio in (which is nice, because
> > I can preprocess the voice audio). Can  anyone else recommend embedded
>
> Telit also suupports digital audio.
>
> There are also modules from Siemens (seehttps://pia.khe.siemens.com/index14287.htm)
>
> Best Regards
> AK


Oh my, how did I miss that? Can you point me to the module /data sheet
section where they advertise the digital audio interface for the telit
modules? Thanks!

On Feb 26, 11:40 am, j...@mit.edu wrote:
> Hello! I've been wanting to design a phone for a while -- and I'm
> looking for recommendations for tiny quad-band GSM modules for
> embedded projects. These things have started turning up for machine-to-
> machine (telemetry) applications and the like over the past few years.
> In particular, the Telit series of modules (sparkfun.com) and the
> motorola G24 both look awesome.
>
> Currently, some of the Telit ones (such as the GE864-PY) are smaller,
> but the motorola one accepts digital audio in (which is nice, because
> I can preprocess the voice audio). Can  anyone else recommend embedded
> modules similar to these?
>
> Thanks,
>     ...Eric

Wavecom make GSM modules. I don't know how they compare in size with
the Telit and Motorola, but they can be programmed to run your own C/C+
+ application on the module using something Wavecom call OpenAT.

- Charles

> Currently, some of the Telit ones (such as theGE864-PY) are smaller,
> but the motorola one accepts digital audio in (which is nice, because
> I can preprocess the voice audio). Can  anyone else recommend embedded
> modules similar to these?
>>>snip<<<
Several Telit Wireless Modules support a Digital Voice Interface which
can be used to transfer digital
audio data to and from the Wireless Module.
This interface can be used to connect the Wireless Module to a
Bluetooth device as an example.
Some of the Wireless Modules, have two DVI ports but only one can be
active at the time. The choice
of DVI port for these Wireless Modules depends on the use of the
alternate function of the pins of
each interface in other applications.
Please refer to the Wireless Module pin out section below, for the
available DVI ports.
The DVI can be configured either as master (clock output) or slave
(clock input) and works in burst
mode at 8KHz mono voice data.
Both the Audio Front End (microphone and loudspeaker) and the Digital
Voice Interfaces can be
enabled at the same time. In this mode, the analog (AFE) input is only
mixed at the output, not in the
uplink data
Volume on the Digital Voice Interface is controlled with the same AT
command as for the analog
interface like described in the AT Commands Reference Guide for the
Telit modules.
>>>snip<<<

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