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Thread: Whats the maximum Downloading/Uploading Speed of a DSL connection

  1. #31
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    128Kbps (128 kilo BITS per second) = 16KBps (16 kilo BYTES per second)

    256 Kbps (256 kilo BITS per second) = 32Kbps (32 kilo BYTES per second)

  2. #32
    AO übergeek phishphreek's Avatar
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    Also, what type of border device do you have? Most routers will have some type of traffic analysis utility so you can see the traffic stats in real time. That may be more accurate than trying to look at it on your workstation.

    The border devices (routers/firewalls) have "buffers" in them. These buffers hold the traffic (or packets) while deciding on what do to with it. (where to send it, if its allowed, etc.) Your sending/receiving traffic is queued in buffers before being sent to the destination. When you're seeing these bursts on your workstation, it could be because of the border device.
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  3. #33
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    The first thing required for a good discussion, any discussion, is an agreement of the definition of terms.
    People using different terms easily produce different results and the discussion usually, if not always, gets nowhere.
    If one cannot agree on definitions, then the discussion based on the usage of those undefined terms, has little life or authority, or in other words, has much confusion.

    That being said (and hopefully understood).

    Nihil said it best when he mentioned to NOT get your bits and bytes mixed up.

    The correct written way to describing bits is with a little "b". As in 640kbits, or 640kb, or 640k

    The correct written way to describing bytes is with a capital "B". As in 640KBytes, or 640KB, or 640K.

    Note that the "k" or "K" is not used consistently across computer-dom. Someone may use a small "k" and a capital "K" as synonymous, others may use it the other way. I've seen all combinations in my career.

    Also know that in standard computing usage today, 8 bits = 1 byte.
    It has not always been this way, but I digress.

    Your thread and your link show:
    theoritically they say its 9 MBps for Uploading and 640Kbps....
    That reads as 9 Mega Bytes per second and 640 Kilo bits per second.
    This is not possible, even theoretical, for a 384Kb line.
    Obviously the linked definition is in error.

    Know that SDSL is an acronym for Symmetric Digital Subscriber Line, whereas ADSL is an acronym for Asymmetric Digital Subscriber Line.
    Something that is symmetrical has corresponding parts, in our case meaning a similar download and upload speed, by definition of SDSL.
    Knowing that information, we can see the linked definition is even further out in left field and not to be trusted.

    There's a huge discrepancy about the speed of SDSL because it's NOT a standard and it's been implemented, since 1991, under a different standard depending on whether its in North America or in Europe. The so-called "SDSL of Europe is really G.SHDSL.
    In America, generally the "SDSL" speed is 1.5Mbps to 2Mbps.
    With an Netopia R7100 SDSL router with channel bonding and two SDSL lines it's reported that a 3Mbps connection can occur.

    Obviously the 2nd part of Nihil's post applies. It all depends on many other factors.
    ZT3000
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  4. #34
    AO's Resident Redneck The Texan's Avatar
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    This response is for Nihil, I could be wrong but I thought cable internet was a shared connection i.e. the more people on "taxing the line" the less bandwidth you have. Is DSL the same principal or is it different? now I do know the difference between ASDSL and SDSL.
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  5. #35
    AO übergeek phishphreek's Avatar
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    Is DSL the same principal or is it different? now I do know the difference between ASDSL and SDSL.
    No, DSL is not the same principal. You don't share it with anyone else.

    http://www.webopedia.com/DidYouKnow/...ble_vs_dsl.asp
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  6. #36
    Senior Member nihil's Avatar
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    Hi Tex~ I think that I understand your question. Please appreciate that I can only speak for the UK here

    SDSL is commercial only AFAIK. It has equal up and down speeds that suits brokers and the like...........it is for commerce, specialist stuff at thatl.

    Our ADSL varies from single user, 4, 20 and 50 (at least for my supplier). You connect down your own copper phone line, but have to share the service . This is what I meant by "contention". They allocate so much resource per "unit" and that then gets divided up depending on the users.

    The concept of "contention" applies both to DSL and cable in a domestic contract type situation. From a commercial viewpoint, the provider is selling the same service/resources to numerous customers and counting on the fact that they won't all want to use it at the same time.


  7. #37
    AO's Resident Redneck The Texan's Avatar
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    AFAIK, like with the company I work for we have tiered DSL. the first package is 768/128 the 2nd is 1.5/384 and the 3rd is 3.0/768. The speed you get depends on what you are willing to pay for and if it is available in your area... There are limitations such as local loop length < 18000 ft. and load coils so forth. Now I think im still a little confused here, I realize that even if you are provisioned for 3.0 mbps download with dsl you will almost never pull exactly that, if ever. But that being said, if dsl isnt a "shared connection" like cable is then shouldnt you theoretically be able to do it? but I saw that you said you have your "own line" but share the service. by that, do you mean they put a certain amount of bandwidth on the "shared line" lets say 30 Megs and 10 people have dsl so they would each "get" roughly 3 megs? or am I incorrect? do I even make sense? lol. Im trying to put this into words and having a rough time of it.
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  8. #38
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    Originally posted here by The Texan
    This response is for Nihil, I could be wrong but I thought cable internet was a shared connection i.e. the more people on "taxing the line" the less bandwidth you have. Is DSL the same principal or is it different? now I do know the difference between ASDSL and SDSL.
    Sorry to steal Nihil's thunder but I had to bring up a point.

    DSL does not share bandwidth until it reaches the CO. At that point, all inputs for that certain circuit are all joined together before it's all multiplexed further on as it heads out.
    So if you were to call SBC and talk to a tech, a 3rd level tech (the highest) would tell you that YES, DSL is joined...just like cable except further downstream at the CO (otherwise known as the DSLAM).

    ZT3000
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  9. #39
    Senior Member nihil's Avatar
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    OK, it is something like that, it is the resource you get allocated at their end.

    Think if I have two machines and a 1Gbps link and a router............I can give them both an equal share, or I can let them fight it out, or whatever? I will still only get the maximum 1Gbps for my link.

    If people abuse the system, then the basic performance will fall dramatically. As I said, the suppliers are percentage players, unless you pay top dollar for guaranteed SLAs



    EDIT: No worries ZT3000 I just implement the user end of things, I don't know much about the ISP/Telco side other than what guys have told me.

  10. #40
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    My ISP is also among the large ISP's here, They also offer other telecomm. services too....... and the package we are using doesnot impose any restrication on the volume of the data we download..... There are packges with restrication upto 1 GB and they cost less than what we are currently paying to them.

    The only reason to raise this thread was the fact that people here believes that 30 or 30+ Kbps (bits) is the maximum one can get on 256 Kbps line.... which is a wrong fact .... this has to be 30+ Kbps (bytes)....... This discussion has certainly clear the doubt in my mind So
    for you guys....

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