Questions about AT+COPS=4 with BG95-M3/5

IoT Modules LPWA Module
1

Hello,
we are trying to reduce the time for Network registration in eMTC, NBIoT and GPRS, and AT+COPS=4 seems a great idea, however we need some info on the module behaviour

Let’s say I have set eMTC->NBIoT->GPRS sequence with ‘nwscanmode’, ‘iotopmode’ and ‘servicemode’, and I send the command AT+COPS=4,2,“12345”,9 (= try first to connect to NBIoT with PLMN “12345”, if fail switch to auto):

If the modem fail to connect to NBIoT with PLMN "12345, will it then try to connect to eMTC & GPRS only with selected PLMN “12345” OR will it search for any PLMN with the order eMTC->NBIoT->GPRS ( similar to AT+COPS=0 command) ?

In other words, is the command AT+COPS=4,“12345”,9 similar to
AT+COPS=1,2,“12345”,9
if fail AT+COPS=1,2,“12345”,8
if fail AT+COPS=1,2,“12345”,9
if fail AT+COPS=1,2,“12345”,0

or similar to
AT+COPS=1,2,“12345”,9
if fail AT+COPS=0

or something else ?

2

Yes, I think your understanding is correct

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4

Excuse me Herbert, can you be more clear ? Which of the two options apply :

A) If the modem fail to connect to NBIoT with PLMN "12345, it will then try to connect to eMTC & GPRS only with selected PLMN “12345”

OR

B) If the modem fail to connect to NBIoT with PLMN "12345, it will search for any PLMN with the order eMTC->NBIoT->GPRS

Which of the two options is valid ?

5

A is correct discription

1 Like