BSNL Broadband Line Connecting Error Codes and Solutions

Customers of broadband in many are worrying about the BSNL broadband line error codes 619, 629, 631, 633, 645, 650, 651, 678, 680, 691, 718, 721, for line connecting which enables in most frequent with BSNL ADSL Modem (CPE) in Broadband Services with Possible Solutions to rectify simply. Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology, enables faster data transmission as per new broadband subscription over copper telephone lines than a conventional voice band modem, which can provide for broadband services to the customer via ADSL Modem.

On connecting to BSNL Broadband Services, many of the customers are getting the line connecting error codes, for this, we are presenting some of the line connecting error codes with some possible solutions as follows.

BSNL Broadband Line Error

Broadband Error Code 619 (The Port is disconnected): BSNL broadband line error 619 often occurs when another application/process requires the same port as being used by the broadband/internet modem. In particular, fax software is often associated with error 619. Should you encounter error 619 whilst using fax software – disable the fax software and reboot.

The quick/common fix for Error 619 is to shut down / reboot, thus forcing the offending port to close.

To fix error 619, try the following steps

Restart / reboot PC. Wait until all applications have loaded before reconnecting.

  • Check all modem, phone cables and filters.
  • If error 619 persists – uninstall and reinstall your BSNL Broadband Modem. Sometimes, error 619 can be caused where old ISP modem software is conflicting with newer modem software, therefore, ensure that any old software is removed and retest the connection.

Broadband Error Code 629

Error Code – 629 – The port was disconnected by the remote machine

  • Error 629 generally means that the remote computer (ISP) is closing/disconnecting the port. This might be due to incorrect connection settings such as incorrect username and/or password. Having checked these settings, if error 629 persists, it would be wise to check ISP server status for any server outages or other ISP related problems.
  • Having checked connection settings, ISP server status – the next step would be to check all modem connections, cables and broadband filters – followed by a PC and modem reboot. If Error 629 has still not cleared, you may wish to revert to either local or ISP technical support.

One such listing details the causes of Error 629 as follows

  • The modem driver is corrupt
  • The DUN connection is dialing an invalid access number
  • The modem is not attempting a compatible connection Authentication failure (invalid username or password) Invalid or corrupt DUN connection settings

A possible solution for BSNL broadband line error 629
Restart your computer and wait until all applications have completely loaded before trying to reconnect. Recreate the Dial Up Connection. If your problem has still not been resolved, then uninstall and reinstall your Broadband modem.

Broadband Error Code 631

Error Code  631 –  The port was disconnected by the user

With error 631, the user disconnected themselves – there is usually no fix required – just connect again. Error 631 is usually a one-off glitch, caused when a connection is interrupted by the user or another program on the PC.

The possible solution for Error  631

  • Error 631 is usually a one-off error which happens when the connection is interrupted by the user or another program on the PC. In order to resolve Error 631, all that is usually required is a restart and to wait until all applications have completely loaded before trying to reconnect. Recreate the connection and usually – no more error 631.
  • In some circumstances, BSNL broadband line error 631 can be caused by incorrect connection settings or by using the wrong modem or modem software. If a simple restart does not fix your error 631, check that the modem is correctly installed and connected, whilst ensuring that any old modem software has been uninstalled. If error 631 persists, technical support might be required or a google for error 631 to see if the forums have anything to offer.

Broadband Error Code 633

Error Code – 633 – The port is already in use or is not configured for Remote Access

The possible solution for BSNL broadband line error 633

  • Error 633 is similar to Error 619 error and is often caused by other applications attempting to use the broadband modem, incorrect connection settings and sometimes a corrupt modem driver.
  • Error 633 can usually be resolved with a PC restart. This works 50% of the time. Failing this, error 633 might require best the user to disable any Firewall Software. Try to connect again. Recreate the connection and finally, try uninstalling and reinstalling the Modem.

Broadband Error Code 645

Error Code – 645 – Internal authentication error

A possible solution for BSNL broadband line error 645

This problem tends to occur with users of Windows 98 or Windows ME and can often be resolved via the following steps

  • Recreate the Connection.
  • Windows 95/98 – This error can occur if the Require encrypted password option is enabled on the Server Types tab in the connection’s properties, or an incorrect user name or password have been entered. (See Error Message “Error 645” Using Dial-Up Networking).
  • All versions of Windows – This error can occur if you are attempting to connect to a Windows 2000 domain that had an RRAS (Routing and Remote Access Services) server log on without administrative privileges.

Broadband Error Code 650

Error Code 650 – The Remote Access server is not responding

It can occur if the ISP server modem/equipment is not set up properly.

The possible solution for BSNL broadband line error 650

The most likely reason for one of the above errors is a Network Problem, Consider the following steps

  • After receiving this error wait 15 minutes and then restart your computer. Once it has restarted wait until all applications have completely loaded before trying to reconnect.
  • If you receive the same error, check with your service provider for Network Outages. You may need to be patient.
  • If there are no network outages, the problem may originate from your computer. In this case, recreate your connection and if this fails to resolve the problem, uninstall and reinstall your Broadband modem.

Broadband Error Code 651

Error Code  651 – Your modem (or another connecting device) has reported an error

Possible solution / fix for error 651

  • Error 651 usually points to a driver error or modem hardware failure.
  • To resolve Error 651, first ensure that the modem is correctly connected to the PC and telephone line, with all points covered with broadband filters.
  • Ensure that full connectivity is indicated on the modem.
  • Having checked these things and restart. If this does not resolve the error 651, go through an uninstall and reinstall of the modem software. Thereafter, if Error 651 persists, it’s possible that the modem is faulty.
  • If the modem is the USB variety, try connecting to a different USB port on the PC or another PC entirely to confirm that it is not a problem with USB port. If Error 651 still persists, technical support is indicated.

Broadband Error Code 678

Error code 678 – There is no answer

BSNL broadband line error 678 is usually associated with Windows XP and can normally be resolved by restarting and waiting until all applications have completely loaded before trying to reconnect.
Although ADSL modems do not dial to connect to the internet, error 678 – no answer – can still occur and sometimes results because there is an invalid number entered for the computer to dial.

The following steps are often indicated to fix Error 678

  • Click on the Start Menu and then select Run.
  • In the box which appears type the word command in order to open the command prompt and then click OK.
  • In the black command prompt window, type netsh interface ip reset log.txt and click on Enter on your keyboard, then type exit into the command prompt and then click on Enter on your keyboard.
  • Now restart your computer and reconnect to the Internet.

Broadband Error Code 680

Error code – 680 – No dial tone

Error 680 usually means there is a problem receiving the Broadband signal at your modem and it has a great many potential causes.

The best way to resolve BSNL broadband line error 680 is to work logically to rule out each potential cause.

  • The first consideration is to know if the broadband connection is actually live. Installing modem and modem software can result in Error 680 if the ‘go-live’ date has yet to be reached.
  • The next ‘fault find’ is to ensure that the modem is connected to the telephone master socket, whilst ensuring that all extension cables, phone splitters, and all other devices have been removed.
  • Disconnect faxes, alarms and Sky TV (if connected) and once removed, attempt a broadband connection directly via the telephone master socket (ensuring that a broadband microfilter is being used. If Error 680 persists, try using a replacement microfilter (sometimes a cause of error 680).
  • The next thing to consider with Error 680 is electrical interference from cordless/digital phones and any other potential sources of electrical energy. Having ruled out all of these potential causes, one remaining consideration would be to update the modem drivers, which in most cases can be obtained from the manufacturer’s website.
  • If after these steps, Error 680 persists, technical support would be the next course of action.

BSNL Broadband line error code 691

Error code 691 – Access denied because username and/or password is invalid on the domain

With all Windows versions – Error 691 can occur if you use a bad username or password.

  • Remember in most instances the password is case-sensitive – you will not see the password, so if CAPS LOCK is not the way you expect it, you may have a problem with upper/lower-case.
  • It may also occur if there is a problem with your service provider’s access equipment, or on a ‘bad’ connection where the modem is retraining. Can also occur with incorrect Connectoid settings.
  • If you get error 691 with a new account – you may not be using the correct username and/or password. Verify with your provider exactly what you need for your username and password.

BSNL broadband line error 718

Error code – 718 – PPP timeout

  • Indicates a PPP conversation was started, but was terminated because the remote server did not respond within an appropriate time. This can be caused by poor line quality or a problem with the server (ISP). This error can occur
  • when your modem has connected to the ISP and has sent username and password, but there is no response from the server. Sometimes, re-dialing will be successful.
  • Error 718 can also occur if your ISP account has expired, or if the username or password you are using is invalid. Error
  • 718 can occur if you have LCP extensions enabled in the TCP/IP Properties of the connectoid and your ISP does not support LCP extensions.
  • Error 718 may also occur if you have one or more network cards in your machine, and the cards do not have TCP/IP protocol enabled, or if the TCP/IP settings are incorrect. (Go to Networking in Control Panel to examine the properties of your network adapters; or, if you are not using the network card(s), disable them in Control Panel->System->Hardware.)

Broadband Error Code 721

Error Code 721- Remote PPP peer is not responding

Make sure your line is working by testing for a dial tone on your phone. Unplug, reboot and plug in again to ensure the driver has loaded. If there’s still no joy, don’t discount the possibility of a faulty modem.

More  about  Error 721

  • BSNL broadband line error 721 generally means that there is a problem with the remote PPP – the PPP server resides with the InternInternet/broadband and is the computer at ‘the other end of the line’ that establishes connections to the Internet. The majority of Error 721 messages are caused by a ‘problem’ with the Internet service provider. Most Internet service providers have a number that can be called to check their service status. With Error 721 problems, it is therefore worth checking the ISP’s service status before checking other possible causes.
  • Another possible cause of BSNL broadband line error 721 messages can be displaced modem connections, adsl cables and / or broadband filters. If an Error 721 message has not been caused by the ISP, it would be prudent to check all such connections. Common advice is then to shut down both modem and PC and to wait 5-10 minutes before restarting them. Wait until all PC application has fully loaded before attempting to reconnect to the Internet.
  • Where there are no ISP service issues and all modems, filters, cables are correctly connected – another possible Error 721 fix would be to check all associated PC settings and to update / uninstall modem drivers, reboot and reinstall them again and whilst doing so – take care not to connect the modem until prompted to do so by the setup program.
  • Where no fix is found for Error 721 if time allows – wait 24 hours and try again or seek either local or ISP technical support.

BSNL Broadband Error Codes (Total List)

Error code 619 – The port is disconnected

629 – The port was disconnected by the remote machine

631 – The port was disconnected by the user

633 – The port is already in use or is not configured for Remote Access

645 – Internal authentication Error

650 – The Remote Access server is not responding – It occurs, if the ISP server modem/equipment is not set up properly.

651 – Your modem (or other connecting devices) has reported an Error

678 – There is no answer

680 – No dial tone

691 – Access denied because username and/or password is invalid on the domain

721 – Remote PPPoE peer is not responding

718 – PPP timeout

Other BSNL Broadband Error Codes

600 – An operation is pending.

601 – The port handle is invalid.

602 – The port is already open.

603 – Caller’s buffer is too small.

604 – Wrong information specified.

605 – Cannot set port information.

606 – The port is not connected.

607 – The event is invalid.

608 – The device does not exist.

609 – The device type does not exist.

610 – The buffer is invalid.

611 – The route is not available.

612 – The route is not allocated.

613 – Invalid compression specified.

614 – Out of buffers.

615 – The port was not found.

616 – An asynchronous request is pending.

617 – The port or device is already disconnecting.

618 – The port is not open.

BSNL error code 619 – The port is disconnected.

620 – There are no endpoints.

621 – Cannot open the phone book file.

622 – Cannot load the phone book file.

623 – Cannot find the phone book entry.

624 – Cannot write the phone book file.

625 – Invalid information found in the phone book.

626 – Cannot load a string.

627 – Cannot find key.

628 – The port was disconnected.

629 – The port was disconnected by the remote machine.

630 – The port was disconnected due to hardware failure.

631 – The port was disconnected by the user.

632 – The structure size is incorrect.

633 – The port is already in use or is not configured for Remote Access dial out.

634 – Cannot register your computer on the remote network.

635 – Unknown Error.

636 – The wrong device is attached to the port.

Broadband error code 637 – The string could not be converted.

638 – The request has timed out.

639 – No Asynchronous net available.

640 – A NetBIOS Error has occurred.

641 – The server cannot allocate NetBIOS resources needed to support the client.

642 – One of your NetBIOS names is already registered on the remote network.

643 – A network adapter at the server failed.

644 – You will not receive network message popups.

645 – Internal authentication Error.

646 – The account is not permitted to log on at this time of day.

647 – The account is disabled.

648 – The password has expired.

649 – The account does not have Remote Access permission.

650 – The Remote Access server is not responding.

651 – Your modem (or other connecting devices) has reported an Error.

652 – Unrecognized response from the device.

653 – A macro required by the device was not found in the device .INF file section.

654 – A command or response in the device .INF file section refers to an undefined macro

655 – The macro was not found in the device .INF file section.

656 – The macro in the device .INF file section contains an undefined macro

657 – The device .INF file could not be opened.

658 – The device name in the device .INF or media .INI file is too long.

659 – The media.INI file refers to an unknown device name.

660 – The device .INF file contains no responses for the command.

661 – The device. INF file is missing a command.

662 – Attempted to set a macro not listed in device .INF file section.

663 – The media .INI file refers to an unknown device type.

Broadband error code 664 – Cannot allocate memory.

665 – The port is not configured for Remote Access.

666 – Your modem (or other connecting devices) is not functioning.

667 – Cannot read the media. INI file.

668 – The connection dropped.

669 – The usage parameter in the media.INI file is invalid.

670 – Cannot read the section name from the media. INI file.

671 – Cannot read the device type from the media .INI file.

672 – Cannot read the device name from the media .INI file.

673 – Cannot read the usage from the media .INI file.

674 – Cannot read the maximum connection BPS rate from the media .INI file.

675 – Cannot read the maximum carrier BPS rate from the media .INI file.

676 – The line is busy.

677 – A person answered instead of a modem.

678 – There is no answer.

679 – Cannot detect carrier.

680 – There is no dial tone.

681 – General Error reported by device.










691 – Access denied because username and/or password is invalid on the domain.

692 – Hardware failure in port or attached device.






698 – A response key name in the device .INF file is not in the expected format.

699 – The device response caused buffer overflow.

700 – The expanded command in the device .INF file is too long.

701 – The device moved to a BPS rate not supported by the COM driver.

702 – Device response received when none expected.





707 – X.25 diagnostic indication.

708 – The account has expired.

BSNL broadband error codes 709 – Changing password on domain.

710 – Serial overrun Errors were detected while communicating with your modem.

711 – RasMan initialization failure. Check the event log.

712 – Biplex port is initializing. Wait a few seconds and redial.

713 – No active ISDN lines are available.

714 – Not enough ISDN channels are available to make the call.

715 – Too many Errors occurred because of poor phone line quality.

716 – The Remote Access IP configuration is unusable.

717 – No IP addresses are available in the static pool of Remote Access IP addresses.

718 – PPP timeout.

719 – PPP terminated by remote machine.

720 – No PPP control protocols configured.

721 – Remote PPP peer is not responding.

722 – The PPP packet is invalid.

723 – The phone number, including prefix and suffix, is too long.

724 – The IPX protocol cannot dial-out on the port because the computer is an IPX router.

725 – The IPX protocol cannot dial-in on the port because the IPX router is not installed..

726 – The IPX protocol cannot be used for dial-out on more than one port at a time.

727 – Cannot access TCPCFG.DLL.

728 – Cannot find an IP adapter bound to Remote Access.

729 – SLIP cannot be used unless the IP protocol is installed.

730 – Computer registration is not complete.

731 – The protocol is not configured.

732 – The PPP negotiation is not converging.

733 – The PPP control protocol for this network protocol is not available on the server.

734 – The PPP link control protocol terminated..

735 – The requested address was rejected by the server..

736 – The remote computer terminated the control protocol.

737 – Loopback detected..

738 – The server did not assign an address.

739 – The remote server cannot use the Windows NT encrypted password.

740 – The TAPI devices configured for Remote Access failed to initialize or were not installed correctly.

BSNL broadband error codes 741 – The local computer does not support encryption.

742 – The remote server does not support encryption.

743 – The remote server requires encryption.

744 – Cannot use the IPX net number assigned by the remote server. Check the event log.

752 – A syntax Error was encountered while processing a script.

The above is the total list of BSNL Broadband error codes for the line connecting in DSL Technology.

All the major BSNL broadband line error codes in Broadband Services which we have discussed as above regarding DSL/ADSL Broadband Modem(CPE) has to be rectified mostly with the above solutions specified, even after it is not rectified, a technical assistant should be attended to solve the BSNL broadband line error problem.


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