# Tx Control line command issues error

**URL:** <https://forum.sierrawireless.com/t/tx-control-line-command-issues-error/29728>\
**Category:** IoT Modules\
**Created:** [May 10, 2023, 5:43pm UTC](https://forum.sierrawireless.com/t/tx-control-line-command-issues-error/29728 "2023-05-10T17:43:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jelyons](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@jelyons](https://forum.sierrawireless.com/u/jelyons)\
**Post date:** [May 10, 2023, 5:43pm UTC](https://forum.sierrawireless.com/t/tx-control-line-command-issues-error/29728/1 "2023-05-10T17:43:41Z")

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Using EM7411 verify Output Power Level for TDD Band 48 and get error to the TXCONTROL entry. Using command line below. Thank you Jerry  
ati  
Manufacturer: Sierra Wireless, Incorporated  
Model: EM7411  
Revision: SWI9X50C\_01.14.03.00 b06bd3 jenkins 2020/09/23 10:53:35  
IMEI: 350734570144121  
IMEI SV: 13  
FSN: 8F3071202804B1  
+GCAP: +CGSM

AT!ENTERCND=“XXXX”  
OK  
AT!DAFTMACT  
290300

OK

AT!DARCONFIG=0,3,48,55990,2

OK  
AT!DALTXCONTROL=0,1,10,1,0,1,12,19  
ERROR

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [May 17, 2023, 8:51am UTC](https://forum.sierrawireless.com/t/tx-control-line-command-issues-error/29728/2 "2023-05-17T08:51:38Z")

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Hi @jelyons  
Welcome you to our community  
In order to troubleshoot your issue, could you please share with me some information as below:

1. Has this issue happened before? Or is this the first time?

2. Is this issue happens only with band 48 or all bands?

3. Please upgrade to latest firmware for your EM7411 module following the link below, then recheck if the issue still happens in this case  
[https://source.sierrawireless.com/resources/airprime/minicard/74xx/em\_mc74x1-approved-fw-packages/#sthash.APuxuxIs.dpbs](https://source.sierrawireless.com/resources/airprime/minicard/74xx/em_mc74x1-approved-fw-packages/#sthash.APuxuxIs.dpbs)

4. You can refer to Section C - Testing on page 72 in the link below for the test procedure  
[AirPrime - EM7411 - Product Technical Specification](https://source.sierrawireless.com/resources/airprime/minicard/74xx/airprime_em7411_product_technical_specification/#sthash.tSh3IX1G.dpbs)

Thanks,

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**Author:** ![jelyons](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@jelyons](https://forum.sierrawireless.com/u/jelyons)\
**Post date:** [May 18, 2023, 9:52pm UTC](https://forum.sierrawireless.com/t/tx-control-line-command-issues-error/29728/3 "2023-05-18T21:52:04Z")

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Jerdung,

Yes followed the steps on Page 72 see attached .txt. Looking into the firmware on our side and what is available to update with . It looks like the “AT!DALTXCONTROL” wasn’t introduced yet for the current firmware I have on the EM7411.

Jerry

![image001.png](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/5/56f932179b1eaa8a0e15f01b3432a785e8ac52ae.png)

![image002.gif](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/a/a3edef240909966df19bfdb0c4f1c76e47a46618.gif)

[Using AT Commands\_ Error.txt](https://forum.sierrawireless.com/uploads/short-url/6eczflhMkVP01qSqdztuSbvscjk.txt) (732 Bytes)

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [May 19, 2023, 9:34am UTC](https://forum.sierrawireless.com/t/tx-control-line-command-issues-error/29728/4 "2023-05-19T09:34:49Z")

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Hi @jelyons  
I see that you are using old Release 16 so please upgrade to Release 20 which I provided in previous comment then recheck if the issue is resolved in this case.

Thanks,