EM7511 - Tool to enable CBRS Band 48

[greg1]

I recently was put on a project to test a number of vendors CBRS modules against a large CBRS provider. I inherited a number of modules including a Sierra EM7511. It had ancient firmware on it which I updated to the latest GENERIC build. I don’t see B48 listed in the AT!BAND=? query. Based on some old discussions on the forum it looks like early units didn’t have that band enabled and there is a update tool to enable. Any chance I could get a hold of that updater? I currently don’t have a commercial contact for Sierra to ping directly. On a side note I also have an MC7411 which is connecting great to B48!

[jerdung]

Hi @greg1 ,
Welcome you to our community!
Please try using command AT!ENTERCND=“A710” then AT!BAND=?
Do the issue still happen in this case?
If you have seen band 48 but it’s not working, please let me know so I can help you further.

Thanks,

[greg1]

AT!BAND=?
Index, Name,                        GW Band Mask     L Band Mask 1    L Band Mask 2    TDS Band Mask    L Band Mask 3    L Band Mask 4
00, All bands                     100600000EC00000 00002100B20E39DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000
01, Europe 3G                     0002000000400000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
02, North America 3G              0000000004800000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
06, Europe                        0002000000400000 00000000000801C5 0000000000000000 0000000000000000 0000000000000000 0000000000000000
07, North America                 0000000004800000 000001000200385A 0000000000000002 0000000000000000 0000000000000000 0000000000000000
08, WCDMA ALL                     100600000EC00000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000
09, LTE ALL                       0000000000000000 00002100B20E39DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000

                                                                    0000000000000002 - B66    
                                                   0000200000000000 - B46    
                                                   0000010000000000 - B41    
                                                   0000000080000000 - B32    
                                                   0000000020000000 - B30    
                                                   0000000010000000 - B29    
                                                   0000000002000000 - B26    
                                                   0000000000080000 - B20    
                                                   0000000000040000 - B19    
                                                   0000000000020000 - B18    
                                                   0000000000002000 - B14    
                                                   0000000000001000 - B13    
                                                   0000000000000800 - B12    
                                                   0000000000000100 - B9     
                                                   0000000000000080 - B8     
                                                   0000000000000040 - B7     
                                                   0000000000000010 - B5     
                                                   0000000000000008 - B4     
                                                   0000000000000004 - B3     
                                                   0000000000000002 - B2     
                                                   0000000000000001 - B1     
                                  1000000000000000 - B19 (850)
                                  0004000000000000 - B9 (1700)
                                  0002000000000000 - B8  (900)
                                  0000000008000000 - B6  (800)
                                  0000000004000000 - B5  (850)
                                  0000000002000000 - B4 (1700)
                                  0000000000800000 - B2 (1900)
                                  0000000000400000 - B1 (2100)

I tried upgrading the firmware hoping it would do the trick. Also tried adding a custom band selection and including a mask for B48 even though it wasn’t available in the list and it doesn’t seem to work around the issue.

Manufacturer: Sierra Wireless, Incorporated
Model: EM7511
Revision: SWI9X50C_01.14.13.00 883709 jenkins 2022/01/05 07:08:35
IMEI: 35458009XXXXXXX
IMEI SV: 14
FSN: YT9242722XXXXX
+GCAP: +CGSM

[jerdung]

Hi @greg1 ,
Please try using the commands below to get into band 48:

AT!ENTERCND=“A710”
AT!BAND=09,“Band 48”,0,0000800000000000

If it returns “ERROR”, please give me the output of the commands below:

AT!ENTERCND=“A710”
AT+CPIN?
AT+CCID
AT+CSQ
AT+CGDCONT?
AT+COPS?
AT+COPS=?

Thanks,

[greg1]

`
AT!ENTERCND=“A710”
OK
AT!BAND=09,“Band 48”,0,0000800000000000
ERROR
AT+CPIN?
+CPIN: READY

OK
AT+CCID
+CCID: 8910100014000902009

OK
AT+CSQ
+CSQ: 17,99

OK
AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

OK
AT+COPS?
+COPS: 0

OK
AT+COPS=?
+COPS: (3,“AT&T”,“AT&T”,“310410”,7),(3,“313 100”,“313 100”,“313100”,7),(3,“Verizon”,“Verizon”,“311480”,7),(3,“T-Mobile”,“T-Mobile”,“310260”,7),(3,“311 490”,"311 49)

OK
`

[jerdung]

Hi @greg1 ,
As far as I know, you are using a network provider in the US? If yes, please go to the link below to upgrade the latest firmware corresponding to the network you are using (for example, if you are using a Verizon SIM, you upgrade firmware Verizon-SWI9X50C_01.14.07.00):
https://source.sierrawireless.com/resources/airprime/minicard/75xx/em_mc75xx-approved-fw-packages/#sthash.pZgKhpXr.dpbs
Then try again, do the issue still happens in this case?

Thanks,

[greg1]

@jerdung I tried switching from the latest GENERIC to the AT&T and then the VERIZON and back to GENERIC and still see the same behavior. I am using AWS as a CBRS provider and am able to connect on other devices (including sierra) so I expect everything is OK with the SIM and network. Just seems like this module isn’t allowing me to scan B48.

Based on some other forum posts:

EM7565 and LTE Band 48

Thank you @mlw! We bought the units last week from DigiKey, so I suppose, they shall support Band 48

EM7565 problem selecting bands index

Thanks a lot, this procedure works. I have just tried it. My modem is configured with index 00. Do you know if it is a problem and in final modem/firmware release, we will be able to switch to index 00 directly or if it will remain like this and even in the modem/firmware final release it will be necessary to switch first to index 01 and then to index 00 to go to the “all bands” ? Regards « Les informations contenues dans ce courriel et tout document attaché peuvent être de nature confidentie…

Looks like early samples didn’t include B48 intentionally and there is an updater tool to enable it. Since this unit was in a batch of early engineering units I speculate it is old. Any way to get ahold of the updater?

[jerdung]

Hi @greg1 ,
For tools that are not published on the source page, please email tech support: support@sierrawireless.com to get it and be guided on how to use it.

Thanks,