Sunday, August 15, 2010

What is a datacard

Its nothing but an external modem that uses mobile signals or SIM cards, just like Tata Plug 2 Surf. Do not confused it with some sort of plastic card like a credit card or a mobile SIM card.

Modems which use mobile phone lines (GPRS, UMTS, HSPA, EVDO, WiMax, etc.), are known as cellular modems. Cellular modems can be embedded inside a laptop or appliance, or they can be external to it. External cellular modems are datacards and cellular routers. The datacard is a PC card or ExpressCard which slides into a PCMCIA/PC card/ExpressCard slot on a computer.
Wiki article

How fast is 3G

A minimum data rate of 2 Mbit/s for stationary or walking users, and 384 kbit/s in a moving vehicle,"[18] the ITU does not actually clearly specify minimum or average rates or what modes of the interfaces qualify as 3G, so various rates are sold as 3G intended to meet customers expectations of broadband data.

Wiki article

How fast is 2G

In 2G systems, GPRS provides data rates of 56-114 kbit/second.

Wiki article

Friday, July 16, 2010

Finland makes broadband a legal right

Finland has become the 1st country in the whole world to make broadband access a legal right for its citizens. Here are some articles related to the news.

Finland is already one of the world's most connected countries, with 96% of citizens online - but the communications minister, Suvi Linden, said that the mandate was necessary in order to improve the availability of internet in Finland's remote rural areas.

In an announcement in September, Ms Linden committed to making 100Mb internet access - one hundred times faster than the connections mandated under the current law - available to all Finnish residents by 2015.

The Guardian article.....

According to the report, every person in Finland (a little over 5 million people, according to a 2009 estimate) will have the right of access to a 1Mb broadband connection starting in July. And they may ultimately gain the right to a 100Mb broadband connection.

CNet article....

Speeds of 1G 2G 3G 4G 5G

Imagine a speed of more than 1 Gbps in 5G in comparison to 1.2 kbps, almost a million times more, of 1G, the speeds of 9.6 kbps of 2G, 2 Mbps for 3G and 100 Mbps for 4G, and higher for 5G would deliver pictures almost akin to physical presence, changing all human activities to the mobile streams and all communication to video with sound. The quality would be 4,000 times better than what we see in our best laptop connection and broadband scheme today.

Here is the original article

Taking the first call on 5G....original article

Saturday, June 5, 2010

1 GB in 34 minutes by AirTel broadband


I just read this page and it says that with AirTel's 4 Mbps broadband one can download a 1 GB movie in 34 minutes compared with 9 hours taken in case of 256 Kbps speed.


So I did the following math, correct me if I am wrong.

1 GB = 1024 MB = 1024*1024 KB (KiloBytes not KiloBits) = 1048576 KB

34 minutes = 34*60 = 2040 seconds

So if you do

1048576 KB/2040 secs = 514 KBps (KiloBytes per second), approximately 0.5 MB per second.

Since 1 Byte = 8 bits

514 KB = 514*8 = 4112 Kbps (Kilo bits per second as mentioned by many ISPs).


Now let us compate the same download of 1 GB done in 9 hours as mentioned in the article.

1 GB = 1024 MB = 1024*1024 KB (KiloBytes not KiloBits) = 1048576 KB

9 hours 9*60 minutes = 9*60*60 seconds = 32400 seconds

So if you do

1048576 KB/32400 secs = 32.36 KBps (KiloBytes per second)

Since 1 Byte = 8 bits

32.36 KB = 32.36*8 = 258.88 Kbps (Kilo bits per second as mentioned by many ISPs).

This is great if it is for real for the AirTel 4 Mbps broadband users. Please let me know if this really works out to your own real life experience. Thanks


Wednesday, June 2, 2010

Reduction in speed after download limit is reached

It seems that only Indian ISPs are punishing their users by reducing their speeds after one has reached his free quota or download limit each month. Sometimes the speeds is reduced to such a level that it looks like a punishment. But in Australia there is one ISP called Optus which also does the same ie reduces the speed once the monthly download cap is reached. Have a look at this tariff table.

Optus tariff plans

64kbps after monthly plan data exceeded

256kbps after monthly plan data exceeded