AT commands (Re: But wich GSM chip? Re: AT commands document (Was: Fax modem? Fax software? Neo as T.38 gateway?))

Aloril aloril at
Sat Feb 3 08:48:08 CET 2007

On Wed, 2007-01-31 at 12:04 +0100, Harald Welte wrote:
> On Tue, Jan 30, 2007 at 09:11:53AM -0800, Dimitris Kogias wrote:
> > Sean Moss-Pultz wrote:
> > > On 1/31/07 12:32 AM, "Robert Michel" <openmoko-sI5mQztjy+JWN59FNKPyOw at> wrote:
> > > 
> > >> So can you say us already a little more about the GSM chip?
> > > 
> > > Sure. We're using a Ti Calypso chipset. Unfortunately this stuff is all
> > > under _super_ NDA :-(
> > 
> > Isn't the AT-capable port going to be available to userland via a serial
> > abstraction?  If so, its AT command profile won't be a secret very long.
> there's nothing secret about that AT command profile.  The chipset
> supports all of the mandatory ETSI GSM TS 07.07 commands (use 
> to get it), plus some of the
> optional ones.
> This GSM standard even has a command that lists the list of available
> commands (AT+CLAC). See attachment.
> There are some vendor-specific, proprietary TI AT commands which will
> remain undocumented. But none of them are required for regular phone
> usage (including SMS, MMS, FAX, GPRS, Voice Call, Data Call (CSD), etc.)
> So I really don't understand all this fuzz.  It's really very much
> standard compliant.

Wild guess: some of "vendor-specific, proprietary TI AT commands" allow
user to write/read GSM module flash. This is probably illegal in many
countries. No surprise whole datasheet is under "super NDA" ;-)

Aloril <aloril at>

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