Re: modems using same port for data & AT command

[Ran Shalit <ranshalit gmail com>]

On Tue, Apr 26, 2011 at 3:38 PM, Shawn J. Goff <shawn7400 gmail com> wrote:

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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I am using a device with one port for both data and connection (MC950D novatel), and it is interesting that after connecting with kppp I can see in the kppp properties (after pressing "details" button) a window of "kppp statistics", which shows number of transmit/received packets. does it mean that the kppp send AT command while in ppp connection ?

 

Thank you for your replies,

 

 

Ran