Hi Giacinto,

Just got response from the hardware contractor.

On 8/3/19, Giacinto Cifelli <gciof...@gmail.com> wrote:
> Hi jupiter,

> This signal level is output periodically by ofono in a signal.
> You can try to catch all ofono signals (these are dbus events, not to
> be confused with signal level and network signaling) with
> dbus-monitor.
> But I think the signal is ok.
> Only the network disables the PDP context. maybe without informing the
> modem.
> This is done by several networks.
>
>> The trouble is it connected well at
>> startup, then dropped it, it is hard to convince the hardware
>> contractor it is hardware problem unless I have strong evidence that
>> is not the software problem.
>
> Ask uBlox how to capture a protocol stack trace, and if it is feasible
> for your application, do it and have it analyzed by uBlox.
>
> Are you on GSM, on LTE catM or on LTE NB-IOT when this happens? On
> which network operator and country?

It is LTE Cat-M1, the operator is Telstra in Australia. I will be very
interested in finding out what is going on.

Thank you.

Kind regards,

- jupiter
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