Some modems, in addition to supporting serial AT commands, also support
proprietary binary protocols (such as Sierra's CnS) on other endpoints.
This usually works even when the modem is tied up in a connection. Check
out Dan Williams's post at
http://blogs.gnome.org/dcbw/2010/04/15/mobile-broadband-and-qualcomm-proprietary-protocols/
for more info on that.
On 04/26/2011 03:38 AM, Ran Shalit wrote:
Hello,
I would like to ask how NetworkManager/ModemManager deals with modems
which use the same port for ppp connection and for AT command.
As far as I understand we cannot retrieve any information using AT
command while there is a ppp connection on that port.
Therefore information such as statistics cannot be retrieved from modem.
Thank you for your time,
Ran
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