AT%N0187 openmoko echo patch?

Lorn Potter lpotter at
Mon Sep 1 10:43:28 CEST 2008

Florian Hackenberger wrote:
> On Monday 01 September 2008, Dietmar Friede wrote:
>> Hi,
>> where is the AT%N command documented?
> Officially: nowhere, they seem to be under an NDA. There was a post 
> stating the commands from a user under [1].

They certainly are not in our copy of the calypso spec's that we got 
directly from TI. If it is, I must be missing it, and haven't found it.

>> Are there more "magic" AT-commands?
> Very likely, yes.
>> What does the value 0187 mean?
> The only thing I know about it is 'Enable AEC and Noise reduction', 
> which is the response you get from the phone if you send the command.
> As OM currently does not seem to have the resources (or motivation as 
> there are more pressing problems) to improve the echo situation it 
> maybe useful if someone from the community could sign an NDA with TI. 
> Maybe OM could help on this front (establishing communication with TI)?
> [1] 

Lorn 'ljp' Potter
Software Engineer, Systems Group, Trolltech, a Nokia company

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