Registering MC7700 over LTE network

IoT Modules MC/EM Series
1

Hi Guys,

I want to scan and register on LTE networks in Canada with a MC7700 and i don’t understand how, at+cops=? seems does not work, modem get freeze.

Bands are correctly configured:

at!band=?
Index, Name,                        GW Band Mask     L Band Mask
00, All bands,                      000000000CE80380 0000000000010008
01, Europe 3G,                      0000000000400000 0000000000000000
02, North America 3G,               0000000004800000 0000000000000000
03, Europe 2G,                      0000000000000380 0000000000000000
04, North America 2G,               0000000000280000 0000000000000000
05, GSM ALL,                        0000000000280380 0000000000000000
06, Europe,                         0000000000400380 0000000000000000
07, North America,                  0000000004A80000 0000000000000000
08, WCDMA ALL,                      000000000CC00000 0000000000000000
09, LTE ALL,                        0000000000000000 0000000000010008

                                                     0000000000010000 - B17    
                                                     0000000000000008 - B4     
                                    0000000008000000 - B6  (800)
                                    0000000004000000 - B5  (850)
                                    0000000000800000 - B2 (1900)
                                    0000000000400000 - B1 (2100)
                                    0000000000200000 -     G1900
                                    0000000000080000 -      G850
                                    0000000000000200 -     G900P
                                    0000000000000100 -     G900E
                                    0000000000000080 -     G1800

OK
at!band?
Index, Name,                        GW Band Mask     L Band Mask
09, LTE ALL,                        0000000000000000 0000000000010008

I tried with GSM and UMTS succesfully.

Thanks for your support.

Gaston Cacheffo

2

Hi,

Use AT1SELRAT command,to configure the modem to use specific Radio Access Technology.

AT1SELRAT=06 ,is used to set the LTE configuration.

Refer Supported AT command guide for aircard/airprime UMTS,for more details.

Thanks.

3

Thanks for your Reply Alex.

I actually have read both guides trying to understand what is happening.

I switched that function before from “00=Automatic” to “06=LTE only” and “07=GSM, UMTS, LTE” but symptom is the same, when LTE is on list AT+COPS=? get freeze.

OK
AT!SELRAT=07
OK
AT!SELRAT=?
!SELRAT: Index, Name
00, Automatic
01, UMTS 3G Only
02, GSM 2G Only
03, Automatic
04, Automatic
05, GSM and UMTS Only
06, LTE Only
07, GSM, UMTS, LTE

OK
AT!SELRAT?
!SELRAT: 07, GSM, UMTS, LTE

OK
AT!GSTATUS?
!GSTATUS: 
Current Time:  245578           Temperature: 27
Bootup Time:   1                Mode:        ONLINE         
System mode:   LTE              PS state:    Not attached 
LTE band:      No band          LTE bw:      Unknown 
LTE Rx chan:   65535            LTE Tx chan: 65535
EMM state:     Deregistered     No Cell        

RSSI (dBm):    0                Tx Power:    0
RSRP (dBm):    0                TAC:         0000 (0)
RSRQ (dB):     0                Cell ID:     00000000 (0)
SINR (dB):     -20.0


OK
at+cops=?

Could SIM card be evolved with this? Do I need anymore?

Regards