For most of the BSNL Broadband connection issues 90% can just be solved by switching off the power supply, pulling all the connected cables to modem and wait for 5-10 minutes and afterwards just join back the cables as there were and power on the modem.

troubleshootng BSNL Broadband connection quickly

Tip – Switch-off your modem when not browsing even if you are in unlimited plan. If the modem has been purchased from BSNL, never change the power adapter of the modem with local one.

BSNL Broadband troubleshoot issues with suggested actions –

Sl No

Indications / observation

Suggested Action


DSL (ADSL) Link light is not glowing or it is blinking and goes off

Check for any loose connection in splitter and modem. Ensure that ADSL/Modem port of Splitter connected to DSL port of the modem


Getting error 691 (in Bridge mode)

Check your user-id and password


Getting error 678 or 769 (in

Bridge mode)

Check whether your Ethernet/USB/Wifi port is in Disabled state. If so, enable it.  Problem not solved ?. Carry-out remedy of sl no: 10, Still problem ?  …. call our helpline


DSL is steady but no browsing

(in PPPoE mode)

Go to modem webpage & check the WAN status of your Modem for possible “Authentication failure”


DSL is steady, no authentication

failure, modem is having your

user-id, but still no browsing

Go to command prompt (Start > Run> type cmd > Press Enter) Give the command  ping  and press Enter. If getting 4 successful replies,  then problem is in your browser. Re-install it or re-install O/s. If getting “Could not find host”, there is DNS issue with your machine/modem, call 1504.


Modem & PC connected via

USB but USB light is not


Check the USB cable for loose connection. Reinstall Modem’s USB driver. Still problem ? call our helpline


Modem & PC connected via

Ethernet but Ethernet/LAN light

not glowing

Check the Ethernet cable for loose connection. Check whether Local Area Connection icon is available under Network Connections in Control Panel. If not available, reinstall driver of the Ethernet card.


Unable to browse in Laptop via


Check whether “Wireless is turned ON” in your laptop. You may have to press Func & F2 or F5 (having wireless symbol) keys or Wireless button or Blue tooth button of your  Laptop to Turn ON/OFF the “wifi” Check whether your Wireless adapter is in enabled state. Remove Ethernet cable & ping to check whether modem is communicating with your Laptop thro wireless


DSL is steady  & no

Authentication failure but still

no browsing

Check whether your modem is having your user-id. If it is showing something like “multiplay”, change it with your user-id, put password, save and reboot the modem and try. Check whether Ethernet/USB/Wifi port of your machine is in Disabled state. If so, enable it.


Unable to open the modem


Assign IP address, subnet mask, gateway as detailed in Para :6. Reboot  and try again