Re: Network manager configuration to connect only to a 3G/HSPA network

[Dan Williams <dcbw redhat com>]

On Fri, 2009-10-23 at 16:02 -0700, Dan Williams wrote:
> On Thu, 2009-10-15 at 22:58 +0100, Richard Braddock wrote:
> > Hi Vinicius,
> > 
> > Instructing the modem to prefer one particular type of network (i.e. a
> > HSPA/UMTS one instead of one using GPRS/GSM) is probably a common
> > query. You can probe what the modem is set to prefer various modes
> > using an AT command, but as seems to be the case with every single
> > damn WWAN adapter manufacturer, standardisation is a concept long
> > since abandoned.
> > 
> > Novatel I believe use AT$NWRAT? while Option have AT_OPSYS. I think
> > from memory most Huawei stuff uses AT^SYSCFG.
> 
> Correct.  It's maddening.
> 
> > In fact, as I write I remember now this is something that gets Dan
> > Williams understandably irate and he did blog about it at one point.
> 
> That would be:

FOrgot the link, but "That's when I reach for my revolver" is the title.

Dan

> 
> 
> > I found this interesting series of messages on this very list that
> > pertain to your issue. It seems that maybe NM do implement this
> > behavioural choice but it's hidden. The thread is here -
> > http://www.nabble.com/UMTS-Vs.-GSM-Vs.-GPRS-td18632471.html
> > 
> > If it scrubs that then just search for "Re: UMTS Vs. GSM Vs. GPRS".
> > Also on the thread is a full list from André Lemos of the AT^SYSCFG
> > commands that work for his E220.
> > 
> > I know some frontends like HSOconnect, Vodafone Mobile Connect (and by
> > extension maybe Wader) have options to prefer or insist on 2G or 3G
> > networks so you can set this behaviour with the minimum of hassle but
> > I'm really not sure if this concept is easily configurable with NM
> > through either that hidden GUI menu or a config file. I'm sure one of
> > the developers can give you more insight.
> 
> The core infrastructure is there, but we need to (a) implement the
> different commands in ModemManager for each modem type, which is
> actually pretty simple to do, but there hasn't been time to do it yet,
> and (b) enable the dropdown in nm-connection-editor; it's currently
> hidden.
> 
> It would take maybe an hour or two to get it working for one modem type,
> and probably a bit longer for the rest.  Any takers?
> 
> Dan
> 
> 
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