# EM7511 CBRS Requires Selecting eutran-48 and eutran-43 **URL:** \ **Category:** MC/EM Series\ **Created:** [October 18, 2022, 9:09pm UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142 "2022-10-18T21:09:58Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![jbroderick1](https://avatars.discourse-cdn.com/v4/letter/j/97f17d/32.png) [@jbroderick1](https://forum.sierrawireless.com/u/jbroderick1)\ **Post date:** [October 18, 2022, 9:09pm UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142/1 "2022-10-18T21:09:58Z")
We are using the EM7511 with the Generic profile in order to connect to a private CBRS Network. The CBRS network is running on center frequency 3690MHz with a 20MHz channel size. The issue is that eutran-43 (deprecated) and eutran-48 to be selected in order to connect. Although the old B43 does overlap in frequency with B48, it would be expected that in order to connect to a network that is fully within the B48 rules (3550-3700 MHz) it would only be required to selected eutran-48 in the band mask. Additional information can be provided upon request. Cheers, Jack ---
**Author:** ![LemonGreen](https://avatars.discourse-cdn.com/v4/letter/l/82dd89/32.png) [@LemonGreen](https://forum.sierrawireless.com/u/LemonGreen)\ **Post date:** [October 19, 2022, 4:18am UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142/2 "2022-10-19T04:18:12Z")
Dear @jbroderick1 , Thanks for raising the ticket I went through your description but I cannot find any questions, can you please description clearly concerns/problems you have on EM7511 CBRS network and what is your expectation then we can start analyzing Thanks ---
**Author:** ![jbroderick1](https://avatars.discourse-cdn.com/v4/letter/j/97f17d/32.png) [@jbroderick1](https://forum.sierrawireless.com/u/jbroderick1)\ **Post date:** [October 19, 2022, 12:03pm UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142/3 "2022-10-19T12:03:44Z")
Hi Lemon Green, The issue is that we would expect to be able to connect to CBRS when eutran-48 only is selected. That is not the case, it requires selecting eutran-43 and eutran-48. Cheers, Jack ---
**Author:** ![jbroderick1](https://avatars.discourse-cdn.com/v4/letter/j/97f17d/32.png) [@jbroderick1](https://forum.sierrawireless.com/u/jbroderick1)\ **Post date:** [October 25, 2022, 12:22pm UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142/4 "2022-10-25T12:22:24Z")
Hi @LemonGreen, Do you have an update on this? Have you been able to reproduce? Thanks, Jack ---
**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\ **Post date:** [November 10, 2022, 4:32am UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142/5 "2022-11-10T04:32:04Z")
Hi @jbroderick1 , According to your previous comment, I understand that your EM7511 module cannot register band 48 when you set only band 48, but can register band 48 when you set band 43 and band 48 , Please confirm. If yes, please share with me output of commands in below two cases: 1. After successfully register band 48 when you set band 43 and band 48 > ``` > ati9 > at!impref? > at!gstatus? > at+cereg? > at+cops? > at!entercnd="A710" > at!band=? > at!band? > > ``` 1. After unsuccessfully register band 48 when you set only band 48 > ``` > ati9 > at!gstatus? > at+cereg? > at+cops? > at!band? > > ``` If not, Please describe clearly your issue so I can help you further. Thanks, ---
**Author:** ![jbroderick](https://avatars.discourse-cdn.com/v4/letter/j/e56c9b/32.png) [@jbroderick](https://forum.sierrawireless.com/u/jbroderick)\ **Post date:** [November 10, 2022, 3:18pm UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142/6 "2022-11-10T15:18:10Z")
Hi @jerdung, You are correct, that is exactly what is happening. 1. Successfully Registering with Band 48 and Band 43 ```auto ati9 Manufacturer: Sierra Wireless, Incorporated Model: EM7511 Revision: SWI9X50C_01.07.02.00 6c91bc jenkins 2018/06/13 23:08:16 IMEI: 353587100145068 IMEI SV: 7 FSN: YT909271280415 +GCAP: +CGSM OK at!gstatus? !GSTATUS: Current Time: 594753 Temperature: 53 Reset Counter: 1 Mode: ONLINE System mode: LTE PS state: Attached LTE band: B48 LTE bw: 20 MHz LTE Rx chan: 55990 LTE Tx chan: 55990 LTE SSC1 state:NOT ASSIGNED LTE SSC2 state:NOT ASSIGNED LTE SSC3 state:NOT ASSIGNED LTE SSC4 state:NOT ASSIGNED EMM state: Registered Normal Service RRC state: RRC Idle IMS reg state: No Srv PCC RxM RSSI: -51 PCC RxM RSRP: -77 PCC RxD RSSI: -53 PCC RxD RSRP: -80 Tx Power: -- TAC: 0001 (1) RSRQ (dB): -6.2 Cell ID: 00000105 (261) SINR (dB): 30.0 OK at+cereg? +CEREG: 0,1 OK at+cops? +cops: 0,0,"Council Rock Test Networ CRock",7 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 0000A700B20E39DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000 01, Europe 3G 0002000000400000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 02, North America 3G 0000000004800000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 03, CBRS 0000000000000000 0000800000000000 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 0000A700B20E39DF 0000000000000002 0000000000000000 0000000000000000 0000000000000000 0000000000000002 - B66 0000800000000000 - B48 0000200000000000 - B46 0000040000000000 - B43 0000020000000000 - B42 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) OK at!band? Unknown band mask. Use AT!BAND to set band. 0000000000000000 0000840000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ``` 1. Unsuccessfully register with only band 48 ```auto ati9 Manufacturer: Sierra Wireless, Incorporated Model: EM7511 Revision: SWI9X50C_01.07.02.00 6c91bc jenkins 2018/06/13 23:08:16 IMEI: 353587100145068 IMEI SV: 7 FSN: YT909271280415 +GCAP: +CGSM OK a!gstats !GSTATUS: Current Time: 595305 Temperature: 53 Reset Counter: 1 Mode: ONLINE System mode: Unknown PS state: Not attached OK at+ee? +CEREG: 2,0 OK at+cops? +COPS: 0 OK tbn? Index, Name, GW Band Mask L Band Mask 1 TDS Band Mask L Band Mask 2 L Band Mask 3 L Band Mask 4 03, CBRS 0000000000000000 0000800000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 OK ``` As a side note, we are running this network on a private network so I have access to the mme logs and I do not see any attach requests after changing the band to eutran-48 only. And the device will immediately register after adding eutran-43 back. Cheers, Jack ---
**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\ **Post date:** [November 23, 2022, 8:44am UTC](https://forum.sierrawireless.com/t/em7511-cbrs-requires-selecting-eutran-48-and-eutran-43/28142/7 "2022-11-23T08:44:15Z")
Hi @jbroderick , 1. Please upgrade to the latest firmware on your EM7511 module following the link below: [https://source.sierrawireless.com/resources/airprime/minicard/75xx/em\_mc75xx-approved-fw-packages/#sthash.0sM28U5D.dpbs](https://source.sierrawireless.com/resources/airprime/minicard/75xx/em_mc75xx-approved-fw-packages/#sthash.0sM28U5D.dpbs) 1. What operating system are you using? (Windows or Linux) 2. Have you installed latest driver on your host? If not, please install latest driver following the link below: For Windows: [https://source.sierrawireless.com/resources/airprime/software/airprime-em\_mc-series-windows-drivers-qmi-build-latest-release/#sthash.GGEODu0x.dpbs](https://source.sierrawireless.com/resources/airprime/software/airprime-em_mc-series-windows-drivers-qmi-build-latest-release/#sthash.GGEODu0x.dpbs) For Linux: [https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.XbgQ1vOF.dpbs](https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.XbgQ1vOF.dpbs) 1. Then recheck whether the problem is addressed? Thanks,