Sending SMS in PDU mode fails.

[Daniele Palmas]

2017-08-07 10:24 GMT+02:00 Aleksander Morgado <aleksander at aleksander.es>:
>>>> I can confirm that LE866-SV1 uses Telit custom 3GPP2 PDU format: there
>>>> should be a PDU example in the AT commands user guide (see +CMGS
>>>> 3GPP2), while EU variants use 3GPP.
>>>
>>> Thanks for the information. Then it is expected that the USA version (the
>>> one I reported) does not work with ModemManager because it uses 3GPP2 PDU
>>> format? Or is this format also supported in ModemManager?
>>>
>>
>> My understanding is that it is currently not supported in ModemManager.
>>
>
> But... https://cgit.freedesktop.org/ModemManager/ModemManager/tree/src/mm-sms-part-cdma.c
>
> The issue here is that the message isn't formatted as 3GPP2/CDMA
> because the modem is actually an LTE modem (i.e. 3GPP). As soon as a
> modem is 3GPP, we use the 3GPP format, see:
> https://cgit.freedesktop.org/ModemManager/ModemManager/tree/src/mm-base-sms.c#n311
>
> The question now would be, is this something that happens to all
> US-version Telit modems?

As far as I know this happens only for Verizon customization that uses
SMS over IMS with 3GPP2 pdu.

> Isn't this actually a bit weird, given that
> the LE866-SV1 is actually LTE-only (i.e. 3GPP-only, not 3GPP2)?

Looks like a carrier requirement for SMS.

Regards,
Daniele

>
> --
> Aleksander
> https://aleksander.es