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Coaxial Cable Throughput: Understanding 10 Mbps vs 40 Mbps Transmission Speeds in Cable TV

dniem 40129 6
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 10219685
    dniem
    Level 2  
    Hi,
    I would like to ask you to clarify a certain issue that came to my mind while browsing information about coaxial cables.
    Namely, it says in all sources that the coaxial cable has a maximum transmission speed of 10 Mbps?

    If this is true, how do cable TV get speeds of 40 Mbps?

    Where is my reasoning wrong?
    If it is not, please explain ...

    Thanks in advance.
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  • #2 10219727
    CHACA
    Level 43  
    Maybe through fiber optic technology.
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  • #3 10219733
    sunlux

    Level 20  
    Hello,

    you probably mean the Wikipedia article:
    http://pl.wikipedia.org/wiki/Medium_transmisacyjne

    But here it is about old Ethernet computer networks in the 10Mbps bus topology (BNC plugs) where the RG-58 coaxial cable was used (as I think I remember correctly) - thinner than the traditional RG-6 coaxial cable currently used in cable networks, which has much better parameters. In addition, it is also about signal modulation in cable networks, etc., bandwidth, width of the return channel ...
  • #4 10219744
    Anonymous
    Level 1  
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  • #5 10219945
    dniem
    Level 2  
    Yes, thanks, that's what I meant.

    Because I had doubts, since a coaxial cable is used in the end part of the HFC network, and it is written that it has limited flow capabilities, I imagined it that the speeds obtained in optical fibers would be slowed down when the signal reached the point of contact between the optical fiber network and the coaxial one .

    Now I will look for something how it is possible that the coaxial cable is capable of achieving such bandwidth.

    As I understand correctly, it is only the DOCSIS standard and its version that determines what speeds we get, right?

    There is, and here is the explanation of the whole matter:
    Link

    Maybe someone has some recent articles about DOCSIS / EuroDOCSIS or some leads.
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  • #7 10220454
    Anonymous
    Level 1  

Topic summary

The discussion centers around the transmission speeds of coaxial cables, specifically addressing the confusion between the stated maximum speed of 10 Mbps and the actual speeds achieved in cable TV, which can reach up to 40 Mbps or more. Participants clarify that the 10 Mbps figure refers to older Ethernet networks using RG-58 coaxial cables, while modern cable networks utilize RG-6 coaxial cables that support higher speeds due to advancements in signal modulation and standards like DOCSIS and EuroDOCSIS. The author acknowledges the role of these standards in determining achievable speeds and seeks further information on DOCSIS technology.
Summary generated by the language model.
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