Whether or not the Huawei BM622 4G WiMAX wireless broadband modem CPE enable/disable its DHCP server we have also to verify our PC if we are using Dynamic or Static IP address to anticipate if the CPE device reboots failed to provide IP address or the PC itself can not acquire its IP address.
Static IP address is more preferable during TFTP firmware uploading operation to make it sure we are in the same IP address subnet and our PC is still connected even if the CPE device fail its DHCP server during power on.
To start with, the PC must be ON with the Static IP address above mention. Power off the CPE device Huawei BM622, unplug the AC/DC adapter then plug it again and remain the power is OFF.
1. Click START and RUN, then typecmdto open windows CLI (command line interface) mode
2. Typecd\to change directory i.g.C:\
3. Make sure yourbm622firmware2010.binis in local drive C:\
4. Typetftp –i 192.168.1.1 put bm622firmware2010.binas you can see from the screenshot below, wait DO NOT press enter yet until to do so.
5. Make sure or double check that the LAN cable is physically connected to the PC and to the CPE device Huawei BM622 port.
6. Using a pin or sharp item insert onto the pin hole and press the “Reset” button at the side of the CPE device Huawei BM622 as shown below snapshot.
7. Press the Power ON button of the Huawei BM622 while still pressing the "Reset" button.
8. Release the “Reset” button of the Huawei BM622 and press Enter to begin the TFTP firmware downgrade/upgrade.
9. Please wait for 1 (one) minute and reboot the modem.
10. Press “Reset” while BM622 is ON.
11. Open your browser type http://192.168.1.1 to verify or check if your firmware is already being uploaded, just do same procedure if it is unsuccessful. This tutorial is if you want to downgrade or upgrade your BM622 firmware via TFTP, this can be also applied to 4G WiMAX CPE Huawei model BM621, BM622i, BM625, and BM626.
Heres the firmware: DOWNLOAD
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