Hi Jonas,
Okay, so now you're opening a whole new can of worms. Dedicated
bearers are similar to secondary PDP contexts in 2G/3G. Their
handling is even more special than primary PDP contexts / default
bearers.
I wouldn't presume that your hardware supports this. You need to
check. How many physical network interfaces are exposed? If its just
one like the gobi has, then you have your answer.
Don't all LTE modems that support voice support dedicated bearers?
The answer is it depends. Even if they do, you still need an IMS VoLTE
stack to do anything useful with them. Most modems have an IMS stack
internal to the firmware, but not all will ship with one for your
typical broadband connectivity stick.
I think I was assuming you'd just get another IP address to set on the
network interface... packets from that source would be handled with a
different QoS setting. Poking around the libqmi archive it seems that
there is some activity around dedicated bearers, but all the modems in
question only one have network interface. But I really don't know
enough about this... :(
The IP address will be the same. All the dedicated bearer does is apply
QoS to a particular service.
Maybe with QMI the packets will flow on the original network interface,
even if a dedicated bearer was setup. But then volte/ims usually uses a
separate APN/bearer anyway.
My hardware has only network interface in any case.
There you go. I think QMI is mostly meant for data-only cards.
Regards,
-Denis
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