Edge speed table

All About Edge/Gprs multislot classes

When buying a phone with GPRS/EDGE modem, you have to have a clear idea on the GPRS/EDGE multi classes. There are 17 classes in GPRS/EDGE system. If your requirement is basic you can go with GPRS/EDGE Class 10. If you need something to do with content uploads, class 10 will not sufficient, you need either Class 12/11/32/33 or 34. Ideally for uploads Class 12 is the cost effective option. You will get a clear picture on which model to choose on the basis of the tables below.  Most of the websites explain the speed of GPRS / EDGE in Time Slots. One Time Slot is equal to 59.2 Kilo Bits. Based on this calculation there are 3 tables.

  1. Timeslot table
  2. Kilobits table
  3. Kilobytes table

GPRS/EDGE Timeslot table

Multislot Class Downlink TS Uplink TS Active TS
1 1 1 2
2 2 1 3
3 2 2 3
4 3 1 4
5 2 2 4
6 3 2 4
7 3 3 4
8 4 1 5
9 3 2 5
10 4 2 5
11 4 3 5
12 4 4 5
30 5 1 6
31 5 2 6
32 5 3 6
33 5 4 6
34 5 5 6

GPRS/EDGE Kilobits table

Bandwidth is measured in Kilobits always. Eight bits are one byte. So if your ISP offer you a 1 MBPs speed, it means that you will get a download rate in 1024 divided by 8, which is 128 KiloBytes.

Multislot Class Downlink/Kbits Uplink/Kbits Active/Kbits
1 59.2 59.2 118.4
2 118.4 59.2 177.6
3 118.4 118.4 177.6
4 177.6 59.2 236.8
5 118.4 118.4 236.8
6 177.6 118.4 236.8
7 177.6 177.6 236.8
8 236.8 59.2 296
9 177.6 118.4 296
10 236.8 118.4 296
11 236.8 177.6 296
12 236.8 236.8 296
30 296 59.2 355.2
31 296 118.4 355.2
32 296 177.6 355.2
33 296 236.8 355.2
34 296 296 355.2

EDGE/GPRS Kilobytes table

If you download something over internet, your browser (such as Firefox / Chrome / internet explorer etc. ) will show the file transfer rate in Kilobytes.

Multislot Class Downlink KBytes Uplink Kbytes Active Kbytes
1 7.4 7.4 14.8
2 14.8 7.4 22.2
3 14.8 14.8 22.2
4 22.2 7.4 29.6
5 14.8 14.8 29.6
6 22.2 14.8 29.6
7 22.2 22.2 29.6
8 29.6 7.4 37
9 22.2 14.8 37
10 29.6 14.8 37
11 29.6 22.2 37
12 29.6 29.6 37
30 37 7.4 44.4
31 37 14.8 44.4
32 37 22.2 44.4
33 37 29.6 44.4
34 37 37 44.4
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Ubuntu problem rectified.

Last Sunday evening, I was checking some photographs in my SD card in my Ubuntu 11.10 Dell laptop. After 20 minutes the battery backup indicated too low and I got the red signal warning. So that I was about to shutdown the system using the tty commandline “shutdown -h now”. But the “u” key did not work. Q,R,T keys also were not functioning correctly. In stead of giving the assigned characters, those keys were printing some numeric values on monitor. Initially I thought this may be something related with keyboard assembly, so that keyboard assembly should be replaced soon. Then I reboot the system using cntrl+alt+del. The same problem repeated after I logged in to the graphical terminal. Then I reboot the system, and logged in the tty. To my surprise, all the keys were working properly. But whenever I log into the graphical terminal the same problem repeats.
What should be the problem, anyone guess?
It was silly. It was not the problem of keyboard assembly, nor keyboard layout. And what? It was nothing but the user profile was corrupt. I renamed the home folder of the current user and logged in again, all the keys started working fine. It took more than 2-3 hours to find the real issue. In my experience silly issues like profile-related problems may consume more time to identify than complicated problems.

Opening note

The word “Hacking” is not at all negative. If you check the word with wikipedia, following result will you get

Hacking may refer to:

Computer hacking, including the following types of activity:
Hacker (programmer subculture), activity within the computer programmer subculture
Hacker (computer security), to access computer networks, legally or otherwise
Computer crime
Illegal taxicab operation
Pleasure riding, horseback riding for purely recreational purposes
The act of stealing jokes
Hacking, an area within Hietzing, a municipal district of Vienna, Austria
Ian Hacking, Canadian philosopher of science

What I mean with hacking is based on computer security.

Hacking means finding out weaknesses in a computer or computer network and exploiting them, though the term can also refer to someone with an advanced understanding of computers and computer networks

As of what wikipedia says, I am not a hacker at all. But I try to learn about the weakness and powers of system security. Thats all. I am running a blog with same name in blogger also. Its address is: http://hackingtom.blogspot.com

This blog is a continuation of that blog. Kindly read on. Happy hacking.