Can one subscribe to any available ISP through same internet cable?

Dr.Sunil Vaswani November 7, 2012

Can one subscribe to any available ISP through same internet cable? Or does a different cable have to be installed in my home?

  1. Dr.Sunil Vaswani
    November 10, 2012 at 5:06 am

    Thanks to all respondents for your valuable efforts

    Appending a subquestion to the main question - Can DSL work on both phone broadband line sockets of same telephone line without connecting one router to another router?

    • Rajaa Chowdhury
      November 10, 2012 at 3:18 pm

      Have filters connected to both the socket. Internet signal should be available in both the socket so use either one of them to connect the ADSL router or modem as case maybe.

      Did not understand what you meant by connecting one router to another router.

      • Dr.Sunil Vaswani
        November 12, 2012 at 7:22 pm

        On reading your first response again , I got answer even to the subquestion posted subsequently

        By connecting one router to another router I meant getting connection ( could be concurrent? ) through "one telephone socket" to second workstation directly from ethernet socket of the modem to the second workstation

  2. josemon maliakal
    November 9, 2012 at 11:46 am

    the best thing is to ask to your connection varies in different places and technologies

  3. Rajaa Chowdhury
    November 8, 2012 at 3:03 am

    In India, it is usually different cables the ISP provides, though technically the same cable should work.

    • Dr.Sunil Vaswani
      November 8, 2012 at 3:47 am

      Rajaa , Can broadband access of MTNL phone line Internet be obtained simultaneously through multiple sockets ( without using wired or wireless router connection for the different workstations )?

      • Rajaa Chowdhury
        November 8, 2012 at 4:58 am

        Dr. Vaswani,

        Before I come to your question, let me give you some insight on the ADSL broadband technology as MTNL uses this technology for providing broadband in India. ADSL stands for asynchronous digital subscriber line and this technology carries the data along-with the voice data along-with the voice data through the old telephone copper wires laid in India. every telephone exchange has a DSLAM (Digital Subscriber line access multiplexer) where all the subscriber lines terminates at the local exchange. The data strength diminishes as the distance increases between you and your local telephone exchange, therefore what is the maximum bandwidth that can be supported via those copper wires also depends on the length of those copper wires from the telephone exchange to your residence (do remember that the wires do not run in a straight line so the length calculated of the wire maybe significantly more than the actual distance of your residence to the exchange). Now it is a mix of voice and data which is delivered via the same wires. So you will notice that the ISP provides what we call as ADSL modem (though they are actually not modems in the true technical term) along with small white (usually) plugs. Sometimes they provide one and others may provide two. if you notice they plugs in into the telephone socket at your home and the other side has two sockets to plugin. These are known as filters and they are the ones which segregate the voice frequency to the data frequency. If you do not use filters, you would probably not get the internet signals. So you plugin the telephone equipment to the socket meant for voice and you plugin the ADSL modem to the USB socket or the ethernet card (depending on the type of the ADSL modem provided by the ISP) in tour computer and it auto-configures it, then connect the cable provided from the ADSL modem to the filter and you should be ready to go. This setup is meant if you have a single device to connect.

        Now coming to your question, where you may have multiple outlets of the same MTNL connection at different part of your residence and you may configure and connect multiple computers through them. You need to have filters connected to each of these outlets and then configure a ADSL modem to each and every device you want to connect. Filters and ADSL modems can be purchased from open markets and they are dirt cheap. You also need to configure the VPI/VCI which is different for every country. VPI/VCI for India is 1/32 (for example in UK it is 0/34). However, please understand with this setup though you can connect multiple devices, but you would not achive simulteneous or as we say concurrent connection to the internet. You need to disconnect one connection to connect from another outlet. (I hope this answers your question). Also, how do you propose to achieve to connect your portable devices like tablets or smartphones via this setup.

        So, the ideal solution is to connect a WiFi ADSL router to the filter at the main telephone outlet. The cable provided with the router needs to be plugged in at the data socket of the filter. Then establish the Wifi between the router and your Wifi device, type in the router IP in your browser to bring up the setup page. Configure the ADSL router by the VPI/VCI I have provided and the username and password provided by your ISP. Also put in a password for W PA authentication so that strangers cannot use your WiFi. You should be good to go then, where you would be able to connect multiple devices simultaneously to the internet. You also do get ADSL router with both WiFi and Ethernet ports provided. You may look into those in case you want to connect your desktop/laptop via the Ethernet and other devices like tablets / smartphones via WiFi. You can purchase popular brands (Linksys, NetGear, Belkin, etc.) of these routers from the open market and they are pretty reasonably priced. The router configurations are pretty simple and user friendly and hardly takes a minute to do.

        Setting up a ADSL is pretty simple and straight forward. :)

        • Rajaa Chowdhury
          November 8, 2012 at 6:00 am

          Sorry for the miss : the VPI/VCI settings differ for every country ISPs. The one given above was for Bharti Airtel. Also forgot to metion the connection & encapsulation type.

          For MTNL :

          VPI/VCI -> 0/32
          Connection Type -> PPPoE/PPPoA (stands for the Point to point protocol)
          Encapsulation Type -> LLC

          Configure the ADSL router with these parameters and your ISP username and password and secure with a WPA password and you should be ready to go.

        • Rajaa Chowdhury
          November 8, 2012 at 6:06 am

          Also forgot to mention, that every outlet that is in use of that telephone line should have a filter attached, even if that outlet is only used for telephone (which should go through the filter) or otherwise you may experience static in your voice calls and drops in the internet connectivity due to interference of each to other. :P

        • Dr.Sunil Vaswani
          November 10, 2012 at 4:52 am

          Thanks Rajaa for your valuable effort

          You may address me as Sunil as inspite of designations ( doctor,lawyer,computer engineer,fabric designer,network engineer..) we are tiny parts and parcels of God

          I would get back to you if further help in the question is required


  4. Adam Campbell
    November 7, 2012 at 12:58 pm

    It depends on what you mean by internet cable. assuming that you you mean DSL, then yes any availible ISPs can be routed through that. If you mean just getting internet then there are quite a few options Wireless, Satellite, 3g... to name a few

    • DrSunil Vaswani
      November 29, 2012 at 5:51 pm


      I meant dsl


  5. Jim Chambers
    November 7, 2012 at 2:24 am

    In my area, reasonably priced internet access is thru coaxial cable or by DSL using regular phone lines. One company controls the cable route but there are several choices using DSL. The speed of the connection is fairly similar.

    • DrSunil Vaswani
      November 29, 2012 at 5:51 pm

      I understand

  6. Anonymous
    November 7, 2012 at 2:04 am

    That depends. If you are using DSL (through telephone wires), any available DSL (and telephone) provider will run through the same lines (they use a common transmission system). If it is via a cable company, their transmission systems are their own so an alternate cable would be used to get the signal to your home. For example, in the Mesa, AZ area there used to be 2 different cable providers and most homes in the area had both cables run to the house with only one active depending on which provider was selected by the homeowner. If the homeowner changed their mind and switched cable (and related internet) provider, one cable would be turned on, the other turned off, and the connection on the side of the house would be changed to the other physical inbound cable.

    • Dr.Sunil Vaswani
      November 10, 2012 at 5:07 am


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