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Thread: downstream and upstream

  1. #1

    downstream and upstream

    im having this problem
    while i upload something my downloads slow down
    why is that
    and can it be fixed
    What I'm running on:

    AMD K6
    Windows XP Pro
    400 Mhz
    192 SDRAM
    ADSL P.P.P.o.E

  2. #2
    Senior Member xbit's Avatar
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    its just what happens. If you upload fully your download is going to sufer

  3. #3
    Regular Member boss672's Avatar
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    yup
    2.53 ghz p4 512mb ram. Windows XP Pro

  4. #4
    Senior Member MosDef112's Avatar
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    Welcome to residential ADSL service at it's best. Unfortunately, there is little you could do to remediate this native limitation. ADSL operates on a shared digital channel, which means that it uses the same digital pathway for both your downstream and upstream data, like a typical analog dial up modem would via the PSTN. ADSL technology was designed with the frame of thought that residential users would typically download more than they would upload, unlike symmetrical DSL which offers symmetrical speeds both ways on a dedicated digital line. A true broadband line, like SDSL, offers a two-channel dedicated digital line, one for downstream and for upstream, so that downloads do not affect your uploads, and vice versa.
    OMARNYC.COM - My place on the web

  5. #5
    Senior Member
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    Originally posted by MosDef112
    Welcome to residential ADSL service at it's best. Unfortunately, there is little you could do to remediate this native limitation. ADSL operates on a shared digital channel, which means that it uses the same digital pathway for both your downstream and upstream data, like a typical analog dial up modem would via the PSTN. ADSL technology was designed with the frame of thought that residential users would typically download more than they would upload, unlike symmetrical DSL which offers symmetrical speeds both ways on a dedicated digital line. A true broadband line, like SDSL, offers a two-channel dedicated digital line, one for downstream and for upstream, so that downloads do not affect your uploads, and vice versa.
    DSL isn't the only connection that is subject to this.

    xelloss, you're experiencing this b/c downloading requires acknowledgment packages to be sent. Thus, if you saturate your upstream, you're down stream will suffer. And vise versa.

  6. #6
    ****** HalfLifer's Avatar
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    Nothin to do with your connection, its the nature of TCP/ip. For every few uploaded packets, a downstream packet is needed for acknowledgement, and etc.
    Work: DQ
    Comp: AXP 1600+, MSI K7T266a Pro2 RU, 512MB PC2100, GF3 Ti200 128MB

  7. #7
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    this link should help clear up for you why this happens


    http://cable-dsl.home.att.net/#Asymmetry





    :2cool:
    Last edited by rodrod5; 07-11-01 at 06:36 AM.

  8. #8
    Senior Member MosDef112's Avatar
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    *** In response to glc1 ***

    Acknowledgement packets, that including error-correction and signaling, are part of overhead and do not really comprise as part of the download/upload limitation unless massive data transfers occur. On a 128K upload channel, massive data transfers isn't likely to happen. This holds true for narrowband connections, nevertheless.
    OMARNYC.COM - My place on the web

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