Is there an equivalent setting in the NetworkManager system connection configuration file for -- 3gpp-set-initial-eps-bearer-settings='apn=something' ?
Is there a similar command or NM setting to set the modem UE Usage Setting to data-centric mode? Equivalent to: AT+QNVFW="/nv/item_files/modem/mmode/ue_usage_setting",01 That command came from a Quectel document for AT&T 3G Sunset Guide. Thanks, Brendan. On Tue, 14 Jun 2022 at 18:08, Brendan Simon <bren...@brendansimon.com> wrote: > Hi Aleksander, > > Many thanks for your response. That is a BIG BIG HELP -- as I currently > have to stop the MM service and restart it in debug mode, just to query > some settings. I then change settings if necessary and then stop/restart > MM in non-debug mode. All that takes a bit of time. > > I've just discovered that MM 1.18.0 is available in `buster-sloppy` distro > - part of Debian Backports, so that looks like the way forward for now. > > Again, many many thanks !! > > Cheers, Brendan. > -- > > > On 14/6/2022 6:01 pm, Aleksander Morgado wrote: > > Hey, > > On Tue, Jun 14, 2022 at 9:53 AM Brendan Simon <bren...@brendansimon.com> > <bren...@brendansimon.com> wrote: > > Hello, > > I have a number of embedded linux boxes with Quectel EC21 4G modems, > connected to various cellular networks (AT&T, Verizon, ...). > > AT&T are removing 3G from some areas and the modems are not reconnecting. My > devices are vanishing off the face of the Internet. > > Quectel have provided some assistance and guidance and advised to configure > some settings for AT&T Sunsetting. The UE Usage Setting was changed to > configure the device as Data Centric (i.e. no voice), however it did not > resolve the issue. > > AT&T provided some assistance - apparently the APN was wrong. Seems like > some generic APNs are being used and not the APN specified in the > NetworkManager configuration. This all worked ok when 3G was available. > > AT&G also suggested the PDP settings of the modem are the issue. > Changing the default PDP context (#!) from an APN of "" to the provided APN > seems to have resolved the connection issue. > > I have used `mmcli -m N --command="..." to modify the PDP context for testing. > > I feel this is hacky and shouldn't be required. > > Is there a better (more elegant and generic method) to set the PDP contexts > so modems (preferably any brand) will work on 4G only networks? > > > The way to elegantly change the APN settings for the initial EPS > default bearer would be using e.g.: > $ mmcli --3gpp-set-initial-eps-bearer-settings='apn=something' > > In QMI-based modems as the EC21, this would internally change the > profile associated to the initial bearer. > > > NOTE: we are using Debian Buster with ModemManager 1.10.0. > > Would upgrading MM help? Buster-Backports has 1.14.0 available, which would > be easy to build/install on the existing OS. > > > The QMI-based initial EPS bearer settings update was implemented in > commit 5613215db8 (November 2020), which was released with > ModemManager 1.16.0. The latest update in the 1.16.x series is > 1.16.10, but the series is now fully unsupported; the latest supported > series is 1.18.x. > > > >
