View Full Version : 28kbps
gotodreams
03-29-2004, 08:53 AM
i connect to the internet using cable net. i have taken a package for speed 28kbps. i just want to know that when i connect to the net why do i get speed of just 5 to 8 kbps . why do not i get the full 28kbps as stated in the package. there are other plans to which offer speeds of 64,128 kbps . will the same happen with these speeds too. since im a novice i want to know this info.is there any way i can increase the speed.
thks
Here are a couple of articles that might help explain what you are seeing:
Kilo-Byte and Kilo-Bit Info: There is a significant difference between these two. The easiest way to get it straight is to go by this:
Bytes - The speed that is displayed by IE and other internet apps as the download speed. Thus with these hardware speeds you can expect this fast of throughput:
56K (Modems) - 7K
128K (ISDN) - 14K
256K (Frame-Relay, DSL) - 28K
1544K (T1, Cable, Wireless) - 125K
Bits - This is more of the physical hardware speed. This displays the throughput in relationship to the hardware throughput. Example on a 56K modem if you were downloading at half speed it would display 23K instead of 2.8K as IE would.
Of course don't be upset when your modem does not get 7K or 56K when downloading, and don't be surprised when sometimes you get 9K on your modem. This is just an overview. Text transfers faster than .zip files because of compression and sorts.
http://theboost.net/speed_test/speed_meter.htm
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The theoretical throughput over a 28K modem is 3,600 bytes per second. Reality is more like 2,400 bytes per second but for the sake of this article we will work at the theoretical maximum. If there was no modem compression then the file would download in 188.66 seconds. On the average with modem compression running we can expect a download time of about 90 seconds which indicates about a 2:1 compression factor. The total number of packets transmitted from modem to modem effectively "halved" the file size. But note that the server still had to keep open the TCP/IP sub system to "send" all the bytes to the modem for transmission. What happens if we can compress the data prior to transmission from the server. The file is 679,188 bytes in length. If we can compress it using standard techniques (which are not optimized for HTML) then we can expect to see the file be compressed down to 48,951 bytes. This is a 92.79% compression factor. We are now transmitting only 48,951 bytes (plus some header information which should also be compressed but that's another story). Modem compression no longer plays a factor because the data is already compressed.
http://www.serverwatch.com/tutorials/article.php/10825_1127431_4
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