AC97 modem support -- docs?

AC97 modem support -- docs?

[Donald Gordon]

Hi

>From peering at the source, it looks like ALSA supports driving various
"modems" via drivers like intel8x0m.  I'd like to try and get one of
these working as a phone line interface with the Asterisk PBX
software.  But I can't find documentation on the interface to these
devices provided by ALSA.  Can anyone point me in the right direction?

thanks

donald


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Re: AC97 modem support -- docs?

[Sasha Khapyorsky]

On 14:02 Tue 13 Dec     , Donald Gordon wrote:
> Hi
> 
> From peering at the source, it looks like ALSA supports driving various
> "modems" via drivers like intel8x0m.  I'd like to try and get one of
> these working as a phone line interface with the Asterisk PBX
> software. 

That is nice idea.

> But I can't find documentation on the interface to these
> devices provided by ALSA.  Can anyone point me in the right direction?

The PCM interface is exactly same as with regular audio device, in
addition there are few special controls 'Off-hook Switch' and 'Caller
ID Switch'. Some yet messy example of such interface usage you may find
there http://linmodems.technion.ac.il/sasha/ma/ma-0.000002.tar.gz ,
look in drv_alsa.c file.

Sasha.


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