# GL7600: HTTP only with GSM **URL:** \ **Category:** GL Series\ **Created:** [May 28, 2021, 2:06pm UTC](https://forum.sierrawireless.com/t/gl7600-http-only-with-gsm/23845 "2021-05-28T14:06:58Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![JanBurg](https://avatars.discourse-cdn.com/v4/letter/j/13edae/32.png) [@JanBurg](https://forum.sierrawireless.com/u/JanBurg)\ **Post date:** [May 28, 2021, 2:06pm UTC](https://forum.sierrawireless.com/t/gl7600-http-only-with-gsm/23845/1 "2021-05-28T14:06:58Z")
Hi, I’m trying to open a HTTP connection with the LTE/GSM modem GL7600. Following the example of section 18.8 in the HL76xx AT Commands Guide I repeatedly got errors like this AT+KHTTPCFG=1,“[xyz.de](http://xyz.de)”,80,0 +KHTTPCFG: 1 OK +KCNX\_IND: 1,4,1 +KCNX\_IND: 1,2,1,2,30 +KCNX\_IND: 1,4,2 +KCNX\_IND: 1,2,2,2,30 +KHTTP\_ERROR: 1,5 I noticed that after switching to “GSM only” mode with AT+KSRAT=1 the problem is gone: AT+KHTTPCFG=1,“[xyz.de](http://xyz.de)”,80,0 +KHTTPCFG: 1 OK +KCNX\_IND: 1,4,1 +KCNX\_IND: 1,1,0 +KHTTP\_IND: 1,1 After switching back to LTE mode it still works until I restart the modem. Is this the wrong way to establish an HTTP connection via LTE? I saw that some other users had similar problems but I couldn’t find a useful answer. Best regards Jan ---
**Author:** ![JanBurg](https://avatars.discourse-cdn.com/v4/letter/j/13edae/32.png) [@JanBurg](https://forum.sierrawireless.com/u/JanBurg)\ **Post date:** [May 31, 2021, 5:19am UTC](https://forum.sierrawireless.com/t/gl7600-http-only-with-gsm/23845/2 "2021-05-31T05:19:19Z")
I had configured the GPRS connection with AT+KCNXCFG=1,“GPRS”,“TM” Is this only valid for 2G networks? Is +CGDCONT the right command for 4G? +KCNXCFG and +CGDCONT seem to do more or less the same. Both have APN, login, password and IP addresses as parameters. Do I need both commands to support 2G and 4G? An example of a fuctioning HTTP connection would be appreciated. Regrads Jan ---
**Author:** ![Donald](https://avatars.discourse-cdn.com/v4/letter/d/ac8455/32.png) [@Donald](https://forum.sierrawireless.com/u/Donald)\ **Post date:** [May 31, 2021, 8:53am UTC](https://forum.sierrawireless.com/t/gl7600-http-only-with-gsm/23845/3 "2021-05-31T08:53:37Z")
Hi JanBurg, Which firmware version are you using? If you are not on the latest firmware, please download the latest one [2.27 version](https://source.sierrawireless.com/resources/airprime/software/hl7692-firmware/#sthash.jGdYgkL2.dpbs) and retry. Please perform and share with me the output of the following AT command: ATI3 AT+CGMM AT+CFUN=1,1 AT+CREG? AT+CEREG? AT+COPS? AT+CGDCONT? AT+KCNXCFG=1,“GPRS”,“your APN” AT+KCNXCFG? AT+KHTTPCFG=1,“[xyz.de](http://xyz.de/)”,80 ---
**Author:** ![JanBurg](https://avatars.discourse-cdn.com/v4/letter/j/13edae/32.png) [@JanBurg](https://forum.sierrawireless.com/u/JanBurg)\ **Post date:** [May 31, 2021, 1:34pm UTC](https://forum.sierrawireless.com/t/gl7600-http-only-with-gsm/23845/4 "2021-05-31T13:34:48Z")
Hi Donald, my modems run with FW ver. 2.23. After USB connection (normally I use it in RS-232 mode) it was detected as USB composite device. Then I started the firmware file HL769x.2.27.183100.201809071813.x7120m\_3\_signed\_exe.exe which ends with the attached window. After reboot the firmware is still 2.23. Did I miss something? ![modem_fw_update](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/e/e96181af524c05e60be87438ad6a891b74ea42e0.jpeg) I also tried to install FlashUSB\_Driver\_1\_0\_1\_1-1 which ended with a Registry Error (flashusb.cat is used by another process). Best regards Jan ---
**Author:** ![Donald](https://avatars.discourse-cdn.com/v4/letter/d/ac8455/32.png) [@Donald](https://forum.sierrawireless.com/u/Donald)\ **Post date:** [June 1, 2021, 11:37am UTC](https://forum.sierrawireless.com/t/gl7600-http-only-with-gsm/23845/5 "2021-06-01T11:37:56Z")
Hi JanBurg, I can upgrade to firmware version 2.27 HL7692 successfully on my device. You can try upgrading it on another PC. Does the issue occur on a specific GL7600 device or all GL7600 devices?