[review] LTE attach config and status

[matthew stanger]

>
>  I don't think that CID=1 is always the one that the
> module expects to use as initial EPS bearer

I'd agree, but so far the small set of carriers we've seen requiring
specific PDP's have all been #1.

Didn't Verizon require to use CID=4 for the same purpose in their
> modems?

Vzw is a little odd, they require their default APN in context #3, but
apparently, and we've yet to make this work,
they(Vzw) say that if you use context #1, which auto populates with
'vzwadmin' will, after the first attach the carrier,
 self provision the rest of the context's.

Docomo in Japan wouldn't do 4G without use of context #1 populated.
SK Telecom in S. Korea wouldn't connect without using context #1, using
blank context #1 populated other context's

I recall a patch were we allowed specifying the CID to use explicitly

yes, and the non-simple interface. We still use it, and without it those
cases above would not work.


On Tue, Nov 27, 2018 at 9:37 AM Aleksander Morgado <aleksander at aleksander.es>
wrote:

> > 4  In 4G the 1 context (where default EPS bearer is created) generally
> does not require an APN, APN is required on other context to set up data
> sessions instead . In any case the rules are made by network operator
> >
>
> Unfortunately, I don't think that CID=1 is always the one that the
> module expects to use as initial EPS bearer, that may depend on the
> modem. So, if we were to add a logic that assumes "initial LTE bearer
> settings are those in CID=1" then that would need to be tied to a
> specific device.
>
> Didn't Verizon require to use CID=4 for the same purpose in their
> modems? (or something like that) @matthew stanger what was that about?
> I recall a patch were we allowed specifying the CID to use explicitly
> via Simple.Connect() for this very same purpose.
>
> --
> Aleksander
> https://aleksander.es
>
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