AT+ECM for connection management, QNCM rx_framing and le16 length prefixed IP tx_framing

[Dan Williams]

On Thu, 2014-04-17 at 04:23 -0300, Julio Araujo wrote:
> Hi Dan Williams,
> 
> I was only able to post the information in the forum today.
> Follow the link with the post:
> http://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?f=3&t=1969

Mostly for my own future reference... :)

Based on the files you posted, this device does not appear to be
QMI-enabled, but is AT-driven with a network interface (as you said)
controlled with AT+ECM:

<bunch of normal AT stuff like CPIN, CREG, etc>

AT+ECM=0,1,"timbrasil.br",4,0,"tim","tim"
+ECM: instance0: rm start link up
OK

and then proceeds to send IP packets on the network interface.

The network status can be queried with "AT+ECM=0,?" to which the modem
replies "+ECM: [0|1]" depending on whether the data connection is up yet
(1) or not (0).

The connection is terminated with:

AT+ECM=0,0
+ECM: instance0: rm start link down
OK

Dan

> Sorry for the delay it was because I'm working hard this last weeks.
> 
> Regarding to the QMI tests that some of you asked to me unfortunately I 
> didn't have enough time to go through and probably I will be not able to 
> do the test.
> 
> I would say thanks once again for all of you that helped with this 
> troubleshooting configuration.
> 
> Best Regards,
> Julio Araujo
> 
> 
> Em 24-03-2014 11:54, Dan Williams escreveu:
> > On Mon, 2014-03-24 at 12:31 +0100, Bjørn Mork wrote:
> >> Julio Araujo <julio.araujo at wllctel.com.br> writes:
> >>
> >>> Hi Bjørn,
> >>>
> >>>
> >>> Sorry for the delayed answer, but I'm very very glad to inform you
> >>> that the modem worked after the last configuration that you sent to
> >>> me:
> >>> # Olivetti Olicard 500
> >>>
> >>> DefaultVendor= 0x0b3c
> >>> DefaultProduct= 0xf017
> >>>
> >>> TargetVendor=  0x0b3c
> >>> TargetProduct= 0xc00b
> >>>
> >>> MessageContent="5553424312345678000000000000061b000000020000000000000000000000"
> >>>
> >>>
> >>> The only thing that I need to do was remove the PPP that it was
> >>> already installed for the other modem that I was using before and then
> >>> after plug the Olicard 500 the Ubuntu asked me to create a new PPP and
> >>> then after create it everything works fine.
> >>>
> >>> I'm sending attached  to you the syslog file and also usb_modeswitch_1-13.
> >>
> >> Great!  Thanks for testing and reporting back.  Could you please post
> >> this information to the usb_modeswitch "Device Information" forum at
> >> http://www.draisberghof.de/usb_modeswitch/bb/viewforum.php?f=3
> >> so that Josh can include this config in the next release?
> >>
> >> I'll prepare patches for the option and qmi_wwan drivers. The Windows
> >> driver does some strange and unexpected things, but I am now pretty sure
> >> the firmware supports a "normal" QMI wwan function.
> >
> > Hopefully it does just work with QMI.
> >
> > Otherwise, we'l need to see if the drivers send any other non-standard
> > AT commands, since AT+ECM isn't turning up any hints?  Also, if we could
> > get "AT+CLAC" and "AT&V" from the device that might be useful to find
> > those non-standard commands.
> >
> > Dan
> >
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