u/Terrible_Ant946

Yamunanagar me kon kon se isp available he?
Jo static ip provide kar sake.

Currently using Airtel.

Hi everyone,

I was experimenting with my Airtel Xstream ZTE F670L ONT via Telnet/BusyBox and ran the command: upgradetest sdefconf 1

Immediately after, the connection dropped. Now, I am completely unable to access the router's Web UI:

• Navigating to [http://192.168.1.1](http://192.168.1.1) returns a 404 Not Found error ("The requested URL was not found on this server").
• Telnet to 192.168.1.1 no longer opens a connection ("Could not open connection to the host, on port 23").
• My PC still gets an IP and shows the default gateway as 192.168.1.1.
• I've tried accessing alternative paths (such as /login.gch, /template.gch, https://, port :8080, etc.) in incognito mode, but the web server still throws 404s.
• Holding the physical hardware reset pin for 30+ seconds did not restore the Airtel Web UI or re-enable Telnet.

Has anyone encountered this on the ZTE F670L? Is there any known method, alternative port, factory recovery URL, or serial/UART trick to revert the default country configuration (sdefconf) back without ISP provisioning?

Any help or suggestions would be greatly appreciated!

https://preview.redd.it/jof6ai2k4kkh1.png?width=1035&format=png&auto=webp&s=67a58a6d9f4956f789a76504ccd6c139fe7fb199

From where i can purchase this ONT?

From where i can purchase this ONT, i have AOT4221NK which is completely locked.

Or if some one have spare & not using kindly contact me.

Hey guys,

I’ve been stuck on this for 2 months and Airtel customer care / technicians have been zero help.

My Goal: I want to use my Grandstream HT813 to make and receive calls on my Airtel landline from anywhere over a private VPN.

The Setup & Problem:

• ONT: Nokia AOT4221NK (Airtel Xstream Fiber)
• ATA: Grandstream HT813
• The Issue: The Nokia AOT4221NK firmware has completely hidden/locked down the SIP/Voice and VLAN settings. I can't extract the IMS SIP credentials.

What I want to know:

1. If I connect the RJ11 Phone Port on the Nokia ONT directly into the FXO port of the HT813, can I relay the landline over SIP to a softphone over VPN?
2. Has anyone gotten the HT813 FXO port working reliably with Airtel’s landline output (Caller ID, disconnect tones, clear audio)?
3. Is there any known trick or admin exploit to unlock/bridge the VoIP VLAN on the Nokia AOT4221NK?

Any tips or working setups would be greatly appreciated!

https://preview.redd.it/4zjyp08woagh1.png?width=1000&format=png&auto=webp&s=69e262a966acfcf9f514c85ce232da79e5b1785a