Re: Hello, please help with my 3G device

[Emfox Zhou <emfoxzhou gmail com>]

On Mon, Jul 16, 2012 at 11:19 PM, Aleksander Morgado
<aleksander lanedo com> wrote:
>
>>>> Hello, it works now! nearly perfect, but still another problem, how
>>>> could I lock the
>>>> network to 3g(td-scdma), and not automaticly switch back and forth
>>>> between
>>>> 3g and 2g(edge, sometimes even gprs)? My signal here is sometimes a
>>>> little
>>>> low,
>>>> and I'd like to not switch back to 2g.
>>>>
>>>> I tried the option 'Type', change it from 'any' to '3G(UMTS/HSPA)',
>>>> then the profile
>>>> didn't work.
>>>>
>>>> Again the detailed log.
>>>>
>>>
>>> I cannot see any "AT^SYSCFG" call in that log, which is the
>>> Huawei-specific
>>> way to get/set allowed modes.. so there's something wrong somewhere.
>>> Specifying the allowed mode in the Simple Connect settings should trigger
>>> mode change if the current allowed modes are different than the requested
>>> ones.
>>>
>>> Anyway, can you try to run the following between plugging the modem and
>>> launching the connection request (assuming here the modem gets index 0)?
>>>
>>> $> sudo dbus-send \
>>>      --system \
>>>      --dest=org.freedesktop.ModemManager \
>>>      --print-reply \
>>>      /org/freedesktop/ModemManager/Modems/0 \
>>>      org.freedesktop.ModemManager.Modem.Gsm.Network.SetAllowedMode \
>>>      uint32:4
>>
>>
>> It simply return the following line:
>> Error org.freedesktop.ModemManager.Modem.OperationNotSupported:
>> Operation not supported
>>
>
> Probably your modem doesn't support mode switching with AT^SYSCFG then...

I just found some manual [1], the command need an '?' after it, thus should be
'AT^SYSCFG?'.

[1] http://www.letswireless.com.cn/cn/down/download.asp?id=81&t=en ,
section 10.6 on page 43

-- 
Emfox Zhou

GnuPG Public Key: 0xF7142EC2

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Compiled on Feb 11 2012, 18:12:55.
Port /dev/ttyACM0

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AT^SYSCFG
+CME ERROR: 3
AT^SYSCFG?
^SYSCFG: 15,2,,0,2

OK
AT^SYSCONFIG?
^SYSCONFIG: 15,2,0,2

OK