I downloaded the firmware files from this website "https://bharatfibre.bsnl.co.in/ontvendor.html". There were two files in the firmware folder. I have used the second file" tclinux_RL821WV_candid_bsnl_V2.0.5-23237.bin" and selected the option "tclinux.bin" to update my router and the update is done and router is working. I want to know this is the first file "125E_V2.0.0B04_OTX_UPGRADE_BOOTLDR_8M.bin" in the firmware folder do ? which option" romfile" or "tclinux.bin" I have to select to update that file ?