# GL7812 - it is not detected by system (Windows 10) and it couldn't register **URL:** \ **Category:** GL Series\ **Tags:** faq\ **Created:** [June 18, 2024, 9:25am UTC](https://forum.sierrawireless.com/t/gl7812-it-is-not-detected-by-system-windows-10-and-it-couldnt-register/32564 "2024-06-18T09:25:07Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![szymon.czapla](https://avatars.discourse-cdn.com/v4/letter/s/45deac/32.png) [@szymon.czapla](https://forum.sierrawireless.com/u/szymon.czapla)\ **Post date:** [June 18, 2024, 9:25am UTC](https://forum.sierrawireless.com/t/gl7812-it-is-not-detected-by-system-windows-10-and-it-couldnt-register/32564/1 "2024-06-18T09:25:07Z")
Hello, I couldn’t find a similar topic to that one. I have made the setup exatly like in manual: 1. SIM card is insterted correctly. 2. Given power is between 6-24V a max current is set to 1A 3. Modem is connected to laptop device through SERIAL-USB cable 4. Device (or let say the connector) is detected by one of the ports. 5. I am not able to send commands to that device using PuTTY software. After that LED lights continuously, which means it didn’t register. I have made second setup (I didn’t see an example of that in manual). I used the microUSB Port instead of SERIAL and only thing thath changed is that the device is not detected by Windows, on any port. I eliminated the problem with SIM card, because it works with different model (I don’t remember which model, but i can say that is USB powered only). I appreciate any help with that. ---
**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\ **Post date:** [June 19, 2024, 9:35am UTC](https://forum.sierrawireless.com/t/gl7812-it-is-not-detected-by-system-windows-10-and-it-couldnt-register/32564/2 "2024-06-19T09:35:33Z")
Hi @szymon.czapla, Welcome to our community! - When you use PuTTY to connect to the detected port of the GL7812, have you tried typing “AT” and then pressing enter to see if it shows “OK”? - Do you have another GL7812? Please try setting it up similarly to see if you can send commands to the GL. - Additionally, please refer to section 5.1 “No Communications through the Serial Link” on page 44 of GL7812 Product Technical Specification to see if it is helpful. [https://source.sierrawireless.com/resources/airlink/hardware\_reference\_docs/gl7812-product-technical-specification/#sthash.wXqeufDl.dpbs](https://source.sierrawireless.com/resources/airlink/hardware_reference_docs/gl7812-product-technical-specification/#sthash.wXqeufDl.dpbs) Thanks, ---
**Author:** ![szymon.czapla](https://avatars.discourse-cdn.com/v4/letter/s/45deac/32.png) [@szymon.czapla](https://forum.sierrawireless.com/u/szymon.czapla)\ **Post date:** [June 19, 2024, 10:06am UTC](https://forum.sierrawireless.com/t/gl7812-it-is-not-detected-by-system-windows-10-and-it-couldnt-register/32564/3 "2024-06-19T10:06:35Z")
Hi, thanks for the answer - I’ve tried that and I can’t even type there, which means ther is no connection with it - Yes, we have another GL7812 and it acts the same - I saw that section. Nothing of it was helpfull Whats weird for me is when I connect the modem through microUSB port then nothing is really happening, which probably means that in the first scenario using SERIAL connection the detected device is actually an adapter SERIAL-USB. ---
**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\ **Post date:** [June 25, 2024, 2:48am UTC](https://forum.sierrawireless.com/t/gl7812-it-is-not-detected-by-system-windows-10-and-it-couldnt-register/32564/4 "2024-06-25T02:48:31Z")
Hi @szymon.czapla, Have you tried setting the baud rate to 9600 bps or 115200 bps? In case the issue still occurs, try another method by using a different serial cable to see if the issue is coming from the cable. Thanks, ---
**Author:** ![szymon.czapla](https://avatars.discourse-cdn.com/v4/letter/s/45deac/32.png) [@szymon.czapla](https://forum.sierrawireless.com/u/szymon.czapla)\ **Post date:** [June 26, 2024, 11:32am UTC](https://forum.sierrawireless.com/t/gl7812-it-is-not-detected-by-system-windows-10-and-it-couldnt-register/32564/5 "2024-06-26T11:32:51Z")
hi @jerdung, the baud rate change from 9600 to 115200 worked for us, thank you for your help! 😉