S1-U data transfer

How to enable the S1-U data transfer in HL7845 module for NBIoT?

how do you verify this feature in your side? (e.g. using network simulator to check the EPS network feature support?)

What is the return of “ati3” and “AT+KCIOTOPT?” in your module?

I’m connecting in private LTE infrastructure and get the logs through wireskark. The HL7845 response indicates that the device doesn’t support this feature. It follows the AT command responses:
ati3
ati
HL7845.5.4.12.2

OK
3
AT+KCIOTOPT?
AT+KCIOTOPT?

+KCIOTOPT:
0,0,0
1,0,0
2,0,1
3,1,0

OK

how about setting “AT+KCIOTOPT=3,1,1”