How to fix a cut coaxial internet cable

dom2 Posted messages 145 Registration date   Status Member Last intervention   -  
brupala Posted messages 111153 Registration date   Status Member Last intervention   -
Hello everyone, I just acquired an apartment. The person before me didn’t have internet and I don’t see any internet box. I’m signing up for an SFR subscription and at that moment, I learn that the building is installed with coaxial. I’ve noted a wall socket in the living room with 3 outlets (TV, radio, and data).
1 - Is it indeed this data outlet that is used to connect the box?

I opened the socket because there was a problem with the TV and I see that there is only one coaxial cable connected to the wall socket

In the wall box, there is another coaxial cable but it is very short and seems to have been cut
2 - Is this cable likely to transmit internet data in your opinion?
3 - Given its condition, is it possible to extend it with, for example, a “sleeve” and 2 F connectors?
4 - If it is possible to extend, what is the nature of the cable? Does a TV-type cable work, or what type of cable is required?

Thank you for the help

3 answers

  1. jeannets Posted messages 28402 Registration date   Status Contributor Last intervention   Ambassadeur 6 603
     
    Hello,

    Indeed, SFR uses the old distribution of "Numéricable," originally a cable distribution, and calls it Fiber... It's a Coaxial cable. Everything runs through it... The basic TNT TV and also internet modulations... You need to connect the SFR BOX (with a Coaxial input)... the speed according to the contract can be from 100mb/sec up to 1gb/sec... and also the landline phone that comes out of this BOX...

    I don't know your house... But often, this connection is made where the collective antenna used to arrive, in times gone by, it's probably this cable that's cut, as it is no longer useful, the TV comes through the SFR COAX.

    -- If you want to extend this cable, it's the SFR one that needs to be extended with good quality Coaxial cable (type 17 dB) with quality connectors and very well done at the ends... but it works within reasonable lengths.

    Here's a summary of the situation.
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  2. brupala Posted messages 111153 Registration date   Status Member Last intervention   14 450
     
    Hi,
    the only cable connected to the TV should also bring the internet.
    How many TV sockets do you have?
    You must have a coaxial splitter somewhere, often in the electrical panel.
    In any case, it's temporary, SFR should connect you directly with FTTH (fiber to the home) one of these days or another if you run a fiber eligibility test.
    See:
    https://maconnexioninternet.arcep.fr/?lat=46.75&lng=1.71&zoom=6&mode=debit&techno=terrestre

    --
    and ... There you go!
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    1. mariam-j
       
      To repair a coaxial cable:
      Materials:
      - Cable of the same type (at minimum)
      - Soldering iron + solder (preferably lead)
      - Aluminum foil
      - Electrical tape;
      Instructions:
      Solder the cores
      Insulate with tape
      Wrap everything in aluminum foil, ensuring that the foil covers the braid or shield foil by 20mm.
      Wrap everything tightly with tape.
      1
  3. dom2 Posted messages 145 Registration date   Status Member Last intervention  
     
    Thank you for these answers.

    I don't know your house... But often, this connection is made where the collective antenna used to come in, in times past; it's probably that cable that's cut, as it no longer serves any purpose, since the TV comes in through the SFR COAX.
    Okay, I didn't know that TV and data were on the same cable. In that case, I have no problem and shouldn't worry about the cut coax.

    You must have a coaxial splitter somewhere, often at the electrical panel.
    In any case, it's temporary; SFR should connect you directly via FTTH (fiber to the home) one of these days or another if you do a fiber eligibility test.

    The apartment is in a 1970s building, likely wired by Numéricable back then. I don't see anything at the panel, which is from that era; however, I will check the landing because there are doors that cover the gas, electric meters, and the other two, I don't know. I have only one TV socket.
    Regarding the fiber cabling, I don't expect much unless I go with Orange or Free or Bouygues, for example, one of these days, especially since SFR has to save money for the 5G deployment.

    I'm doing basic internet, so the coax should be enough for me.

    Given your expertise, I will ask another question:
    - The TV-radio-data socket is right in the middle of the living area; I was planning to move it to another wall; in that case, what can I do?

    Let me explain: the living area is rectangular, and the TV socket is in the middle of a wall that corresponds to the long side of the rectangle. The TV is mounted on a short side of the rectangle, and at the moment, there's a 2.5m TV cable running from the socket to the TV.
    I was thinking that I could place the box next to the TV.

    For that, there are two solutions:
    1 - I put a second coax cable going from the data socket (in the middle of the long wall) to the box next to the TV.
    2 - I put a single cable that extends from the current coax, and next to the TV, I'll put a TV-radio-data box and from this box, I will "pull" the TV and box cables.
    I hope I am clear.


    To repair a coaxial cable:
    Material:
    - Cable of the same type (at minimum)
    - Soldering iron + solder (preferably lead)
    - Aluminum foil
    - Electrical tape;

    I have everything I need at home, great, thank you.

    Thank you for your advice.
    I'll keep you updated on how it's evolving.
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    1. brupala Posted messages 111153 Registration date   Status Member Last intervention   14 450
       
      It's better to install sockets and a coaxial splitter rather than messing around with wild connections; coaxial cable doesn't like makeshift solutions: a lot of losses occur.
      It's important to know that radio waves travel along the periphery of the cable; it doesn't work like electricity.
      The soldering iron should be avoided in this field if you're not an electronics technician.
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