Configure BSNL Siemens SL2_141 Broadband Modem to Access Internet


In this Post I will share how to configure BSNL Nokia Siemens SL2_141/SL2-141 Broadband Modem to enable Internet through both LAN/Ethernet Or by WLAN/Wi-Fi. Siemens SL2_141 is a Type B ADSL Modem from BSNL which features 4 Ethernet ports and Wireless LAN connectivity. Before we configure Internet for the first time, we need to ensure that we have physically connected the Modem properly to both Phone line and Computer.

BSNL Nokia Siemens SL2_141 SL2-141 Modem

How to connect Modem to the PC:

Before we proceed, first we need to ensure that we are connecting the Modem to the Phone line and computer.

1. Turn ON the Modem. You can find the Power button is at the rear of the Modem. Once the Modem is Turned ON, the Power Button LED at the front will glow.

2. Connect the Phone Line cable to the LINE port at the rear of the Modem.

3. Connect Modem to the Computer. Connect a LAN cable (Network cable/RJ45) from Modem to the LAN port (Network Port) of your computer.

4. Once all connection is proper, we can proceed to next step.

Configure Modem to enable Internet through LAN and Wi-Fi (WLAN):


1. Open Internet Explorer, type (Or type and press the Enter key on the keyboard.

2. Now a popup screen asks you to enter ID and password to configure your Siemens SL2_141 broadband modem as we shown below.

Siemens SL2_141 User Name and Password3. Enter below said User name and Password. (Use the default factory user name and password) and click OK.

User name: admin

Password: admin

4. Once you login, we will be at the Device Info page as shown below.

Siemens-SL2_141-homepage5. Click on WAN at the left pane of the window. It will open Wide Area Network (WAN) Setup page.

6. Click on Edit button as shown below. (Note: Service Name will be pppoe_0_35_1)


7. Now you will reach at the ATM PVC Configuration page as shown below.

8. Set VPI and VCI code values. VPI = 0 and VCI = 35. Then click on Next button.Siemens-SL2_141-ATMPVC9. Now you will be at Connection Type page as shown below.

10. Select PPP over Ethernet (PPPoE), also select Encapsulation Mode = LLC/SNAP- BRIDGING as shown below. Then click on Next button.

Siemens-SL2_141-Connection-type-page11. Now you are at PPP Username and password page as shown below. Set below said settings in this page.

PPP Username: Username provided by BSNL.
PPP Password: password provided by BSNL (default password is password)
PPPoE Service Name: dataone
Authentication Mode: AUTO

Siemens-SL2_141-PPP-username-password12. Then click on Next button.

13. Now you are at Enable IGMP Multicast, and WAN Service page as shown below.

14. Ensure that you selected Enable WAN Service (It should be checked)

15. The Service name should be: pppoe_0_35_1. Then click on Next button.


16. Now you are at WAN Setup – Summary page as shown below.

17. Verify the information shown in this page, then Click on “Save” button to save these settings.

18. Once you click on Save button, Modem will reboot. NOTE: reboot is required for the changes to take affect.

19. Close the browser window. It may take1-2 minutes for Modem to reboot!

Siemens-SL2_141-WANsetup-summary20. Congratulation!. You have successfully configured Internet on BSNL Nokia Siemens SL2_141/SL2-141 Broadband Modem . Both WLAN and Wired (LAN/Ethernet) will work now!

Do you want to know how to configure Internet in BSNL UTStar WA3002G4 ADSL Broadband Modem? Then you can check our step by step guide on configuring Internet here.  If you wish to secure the WLAN, then please read this document.

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Founder and Owner of Tricks Guide. SiRu is a Server Support Specialist, Tech Blogger and a Typical Family Man. If you’d like to connect with him, follow him on Twitter | Facebook | Google+

17 Responses to “Configure BSNL Siemens SL2_141 Broadband Modem to Access Internet”

  1. Anurag says:

    Whenever i’m entering the username:admin and password: admin i get an error 401 Unauthorized. please help

  2. Sreekar says:

    Can this be done on Linux?If not,are there seperate instructions?

    • SiRu says:


      Configuration remains same.. Except the fact that you may need to use Firefox on your linux computer

      Note: I have not tried it on linux comp but it should work, ensure that network cable is connected when you enter the Modem IP address..


  3. arka.tict says:

    is there a way to configure the modem without connecting it to the computer with the lan cable?

  4. Vaibhav Bafna says:

    I configured everything correctly. I can connect to the WLAN network but cannot access the internet. In the cofiguration page, shows PPP down. What to do?

  5. Gautam says:


    I have the nokia siemens broadband modem from bsnl…….i was trying to configure WiFi…but..the initial step of… in explorer or google chrome…..are not opening…the messsage…
    The webpage “” cannot be foundDNS error occurred. Server cannot be found. The link may be broken.
    …even chrome cant open……i have checked all the wire connections also…the seema to be alright as my net is working fine…

    plz help


    • SiRu says:

      Ideally, is the default IP address of modem. If a LAN cable is connected to both modem and to your Notebook, then the IP should work.

      If it does not work,please contact BSNL and ask whether any settings needs to be changed.

  6. Pullela says:

    Hi Mr Siru

    First Of All Thank For Publising Dis Info
    Hey I M Havin A Doubt As Of Other Router’s or acess Points Any Reset Button Or, Things 2 Be Done To Reset The Device
    Pls Help Me Out By Sayin Dis As Dis Is Used By many In Ma Home N Some time Problem Comes Vid Password So There Is Any Way Pls Help Me Out
    Regard’s N

    • SiRu says:

      Reset option is available in the Router settings page ( and some router has reset button on it. You can give it a try 🙂

  7. Pullela says:

    Mr Siru Thanks For You r kind Respo
    Sr I Do Saw the Roboot Option In The page, But Am Askin About The hardware reset Or Reboot Option do It Contains
    Pls Kindly Reply

  8. Nisit R says:

    hi mr. Siru
    i have a siemens SL2_141 modem which i m currently using in net cafe . its 3 ports are connected to 2 computers with 5 and 8 mtr network cable and one is connected to main pc .

    As m managing the cafe so , m getting trouble in restricting client pc . if u can plz suggest method to do so .
    Nisit r

  9. shubham says:

    its working on lan but on wifi on laptop it shows limited connectivity and does not work…!!!!

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