Sending SMS in PDU mode fails.

Mon Aug 7 08:51:54 UTC 2017

2017-08-07 10:39 GMT+02:00 Daniele Palmas <dnlplm at gmail.com>:
> 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.
>