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Broadband myth and magic

  • 07-04-2002 9:11am
    #1
    watty
    Registered Users, Registered Users 2 Posts: 32,417 ✭✭✭✭


    People have great faith that having Braodband will make their internet connection better.

    For many of the sites I visit the limit is not the local connection, but the source bandwitdh or the Internet. Some microsoft sites have taken 2 to 3hrs to load while on a 128 K connection.

    Mostly I find NO difference between 49K analog modem and 128 K ISDN.

    Of course a lot of 56K analog modems may be runing at 22K, with lots of errors. This will be noticably slower that 44K with no errors or 64K ISDN.

    Myths on Wireless Networking:
    Main types in Ireland are:
    Office WLAN at 2M or 11M
    Satellite download and modem upload
    Two way satellite
    Chorus Powernet.

    And to come ITSTV Wireless "Broadband"

    On a cable connected to a "switch" rather than a "hub", each network user gets a personal 10 or 100Mbits. A WLAN at 2M or 11M in an office is shared and has additional overhead and usually is half duplex (i.e. talk and listen take turns). So with 10 users on 11M bit WLAN the per user bandwidth is about 1/40th of 10M ethernet.

    The ITSTV wireless broadband works in a similar way to Chorus Powernet or ther rare/expensive 2 way Satellite systems. If 10% of susbscribers are using it, the Bandwidth per user may fall to 2,500 baud download and maybe 300baud upload. Which is absolutely fine for the interactive TV features and the Set top box "back channel", dispensing with the phone line Sky and ITVDigital need.

    If indeed Internet access is offered, rather than just Email (remember Internet Pages don't work too well on a TV Set resolution), it is only going to be usefull ad ungodly hours of the morning or in the early days of the system before there are many subscribers. ADSL on Digital TV cable works because while users do share the cable, it is a tiny number of users per physical /logical cable segment compared with say the number of subscribers on Kippure, Mullaganish or Cairn Hill.

    If ITSTV works and the interative works, I'll be pleased. If you want broadband, lobby Eircom, OTDR and your TD, We should have had true ADSL 6 years ago. Wireless isn't goiong to cut it. Even Chorus power net only gives good speed beacuse in most areas few customers can get it. I have tried an failed for 5 clients in Limerick.


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