Firmware Update for MTNL Wifi Router 450TC1 ??

I have the MTNL Wifi Router 450TC1 (white color with 4 ports)

My firmware details are from Status->Device Info page are :

Firmware Version : V85.2.04.02
ADSL Firmware Version : FwVer:3.12.8.201_TC3086 HwVer:T14.F7_7.0

Is there any newer version available and how can i get it??

From my router box i can identify that the router is made by Beetel India (Its not china,,haha)
I was able to find all the beetel firmwares here : 122.166.105.80/Firmwares.html
which also has firmware for beetel 450tc1

Are these firmware compatible with the MTNL router?

Even the screenshots of Beetel firmware look the same check here :
pcwintech.com/screenshots-beetel-450tc1-beetel-firmware

[please copy paste the links as i cannot post them]

I tried opening the link 122.166.105.80/Firmwares.html but it's asking for a username and password.

Enter user name : admin and password : password

But that is a restricted page and I dont know what you would do as everything in there is password protected. Not even sure whose website that is.

Yes you're right about it. But didn't find any firmware upgrade for my existing 410tc1. Really feel that it can resolve some nagging issues I am facing with it

Give Beetel customer service a call and ask them where to download the latest firmware. I tried googling but could not find anything. All searches eventually lead to this thread and this thread doesn't have it either.