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224 posts

Master Geek
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Topic # 31892 3-Apr-2009 14:52
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Just recently over the past few months my friends on telecom broadband have found that when they go over their cap and telecom reduces their speed to dialup, that when they download something or view a website the connection stops(not disconnected) and starts regularly.
 They said for example when they load when their broadband speed is not slowed it loads continuously, but when their speed is reduced to dialup it loads(you can see router lights flashing and view packets sent/received) for about 5 seconds, then it stops loading, and 5 seconds later it starts loading again, and so on.
 I know dialup speeds are slower than broadband but i used to have dialup and even though sites loaded slowly, they still loaded continously, it didn't start and stop and start and stop.
 Are telecom not only slowing broadband speeds when the cap is reached, but doing something else to make this sort of thing happen?

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  Reply # 205158 3-Apr-2009 15:23
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This could be a technology called deep queueing, basically what deep queueing does is allows a connection to 'borrow' bandwidth from the future, as long as the average speed of the connection remains the same.

e.g. web user downloads a webpage on a capped/dialup connection, the page downloads at 4x dialup, the user sits and reads the webpage, during this time the connection usage is 0 and the connection averages out to dialup speed.

If a user starts downloading a big file, the first MB or two (depending on the depth of the queueing) comes down rocket fast, then it drops off to half dialup connection until the first MB or two is 'paid back' so the connection is downloading at dialup.

You may find that the deep queueing is broken or not deep enough. Or it could be something completely different and unrelated :-)

Tyler - Parnell Geek - iPhone 3G - Lenovo X301 - Kaseya - Great Western Steak House, these are some of my favourite things.

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