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11 December 2014

How to fix errors in BSNL Broadband: General Instructions & Connection Diagnosis

State run PSU, Bharat Sanchar Nigam Limited (BSNL), is the No.1 Broadband Service Provider in India.  Most of us will be using BSNL Broadband service in our home or in our offices. As compared to all other broadband service providers in India, BSNL provides services to almost all rural and remote areas of our country. 


The broadband tariff plans offered by BSNL is also very cheap and affordable to ordinary people. The following video describes some general instructions and connection diagnosis for BSNL ADSL broadband.

How to fix Connection Errors  in BSNL ADSL Broadband ? (See the instructions in the Video given below)

(Click / Tap to play the video)

We should be careful while connecting our Broadband modem and telephone instrument. Always connect ADSL Splitter directly on the telephone line and then connect Modem and Telephone Instrument as shown in diagram below. Never connect ADSL Splitter on the extension line.

How to Connect your Broadband Modem & Telephone Instrument ???


In short, BSNL Broadband Error Numbers and its Solutions are given below:

Problem / Error Number Description Remedy 

Error- 678

This is most common problems. It is due to poor connectivity.

Switch off / Switch on Modem (Power Switch at the back of modem) and wait for 2 minutes. Then retry.

If problem is still not solved then
  • Check link lamp in Black type Modem or WAN lamp in White Modem. If it is blinking, then it is line problem.
  • Check Modem to splitter connectivity.
  • Remove & Connect the cable of / to the modem and to the splitter
  • Remove & Connect the telephone connection of the splitter.

If lamp is still blinking - then it is due to poor line condition / fault. Call lineman for line change.
  • Check for Virus in your Laptop / PC.
  • Disable Firewall in your Laptop / PC.
  • Reinstall Operating System
Error- 691 User id and Password problem.
Enter correct username and password spellings as details are case sensitive.

If problem is still not solved then
  • Make new Dialer & Dial
  • Call Broadband Help Desk for resetting password. ( Call 12678 from your Landline Or STD Code + 12678 from your Mobile )
Error- 769 LAN not enabled.
The LAN Card has to be enabled by following the steps given below.
  • Go to Desktop.
  • Right Click “My Network Place".
  • Click Select Properties.
  • Right click on LAN Icon Click "Enable the local network".
If using USB cable then Install Modem's USB Cable Driver.
Error- 797 Modem or LAN driver problem
  • Check computer LAN Card driver or Modem connectivity.
  • Check for Viruses or corrupt TCP/IP Files
Error- 718

This problem occurs if loading is high on the system and number of customers exceed the call handling capacity of system.
Error - 630-633 Computer LAN Card problem. LAN Card has to be changed.
Error- Limited or No Connectivity IP Address Problem Give Correct IP Address to LAN card
Error- 735 Dialer problem Make New Dialer.
Error - 720 Dialer or Virus problem
  • Make New Dialer
  • Check for Virus in your PC..
  • Reinstall Windows
Error- 676 Modem Configuration problem Give Correct IP Address to LAN card

Change PVC 0/35 to Bridge Mode instead of PPPOE mode

Broadband IP Addresses for LAN

Following IP addresses should be used if Modem is provided by BSNL. Private Modems may have different IP Addresses which will be printed on the device catalog.
  • IP Address - to 250 (may be given 2,3, 4,......248 or 249 upto 250)
  • Subnet Mask -
  • Default gateway -
  • Default DNS Address -
  • (Better use Google DNS Addresses - or or
Broadband Modem Diagnostic Checks 
Dear readers, these instructions and extremely helpful in our day to day life and by knowing these tips we could save a lot of time. Please share your opinions and suggestions via comments.

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