[En-Nut-Discussion] Sony Ericsson MUX protocol

[Brett Abbott]

Matej

This would be useful.

There is another easier option...

Most cellular modems have the ability to switch in and out of command 
mode (to issue AT commands) using the DTR signal.  If youre not using it 
for hanging up, you can initialise the modem prior to dialling to 
support this option. 

When you need to issue commands, you can pause PPP, lower DTR, issue 
your command, return DTR and then resume PPP.  To get PPP paused in 
earlier versions of NutOS, you use the ppp_hackup flag.  In latest 
version you need to make a mod which does the same thing.  Im expecting 
to implement this shortly by way of  issuing a _ioctl command (unless 
someone has already done it?)

Cheers
Brett

Matej Kupljen wrote:

>Hi
>
>I checked the list and I saw that some of you use 
>Sony Ericsson modem GM47r5/GM48r5.
>
>As you know, this modem supports MUX protocol.
>With this protocol you can simultaneously use a single
>UART for PPP and AT commands.
>
>Did anybody try to implement this?
>
>BR,
>Matej
>
>P.S.: Please respond to this email also, since I am not
>subscribed to the list.
>_______________________________________________
>En-Nut-Discussion mailing list
>En-Nut-Discussion at egnite.de
>http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion
>
>
>  
>

-- 
-----------------------------------------------------------------
Brett Abbott, Managing Director, Digital Telemetry Limited
Email: Brett.Abbott at digital-telemetry.com
PO Box 24 036 Manners Street, Wellington, New Zealand
Phone +64 (4) 5666-860  Mobile +64 (21) 656-144
------------------- Commercial in confidence --------------------