telecommunications on S Anand

A ringtone adults cannot hear

Tue, 13 Jun 2006 12:00:00 +0000

Teenagers use it in classes, to avoid detection by teachers. Shopkeepers use the same technology to drive away rowdy teenagers, by creating a loud sound that doesn’t affect adults.

This works because adults gradually lose the ability to hear high-pitched sounds. (via NY Times)

Comments

Livy 12 Nov 2006 5:33 pm: I can here the sounds up to about 18KHz.

Expensive phone

Tue, 31 May 2005 12:00:00 +0000

Time: early in the morning, waiting for office to open.
Location: public phone booth.
Situation: calling a mobile number in London.

Insert coin
20p goes in. Press button to push coin in.
Credit: 20p
10p goes in. Press button again.
Credit 30p
Call mobile number...
07xxxxxxx
"Hi Malu, this is Shobana."
Credit remaining: 20p
"We..."
Credit remaining: 19p
"...just..."
Credit remaining: 18p
"...got..."
Credit remaining: 17p
"...here..."
Credit remaining: 16p
"...last..."
Credit remaining: 15p
"...night..."
Credit remaining: 14p
"...and..."
Credit remaining: 13p
"...are..."
Credit remaining: 12p
"...staying..."
Credit remaining: 11p
"...at..."
Credit remaining: 10p
"...a..."
Credit remaining: 9p
"...hotel."
Credit remaining: 8p
"OK..."
Credit remaining: 7p
"...I..."
Credit remaining: 6p
"...will..."
Credit remaining: 5p
"...call..."
Credit remaining: 4p
"...you..."
Credit remaining: 3p
"...back..."
Credit remaining: 2p
"...later..."
Credit remaining: 1p
"...bye."
Credit remaining: 0p

Flat world

Mon, 04 Apr 2005 12:00:00 +0000

It’s a flat world after all. Thomas Freidman on Globalization, Bangalore, …

Second, the Netscape stock offering triggered the dot-com boom, which triggered the dot-com bubble, which triggered the massive overinvestment of billions of dollars in fiber-optic telecommunications cable. That overinvestment, by companies like Global Crossing, resulted in the willy-nilly creation of a global undersea-underground fiber network, which in turn drove down the cost of transmitting voices, data and images to practically zero, which in turn accidentally made Boston, Bangalore and Beijing next-door neighbors overnight.

Yes, crazy overinvestment can be good. The overinvestment in railroads turned out to be a great boon for the American economy. ‘But the railroad overinvestment was confined to your own country and so, too, were the benefits,’ Singh said. In the case of the digital railroads, ‘it was the foreigners who benefited.’ India got a free ride.

Comments

Genmys 4 Apr 2005 3:56 pm: Some articles are star marked. Why?
S Anand 5 Apr 2005 3:03 am: They are popular or interesting articles.

Call phone towers camouflaged as trees

Fri, 03 Dec 2004 12:00:00 +0000

Cell phone towers camouflaged as trees.

Wireless technology

Mon, 19 Apr 2004 12:00:00 +0000

This week’s Business Week issue is on Wireless Wonders. Interesting reading about the wireless world.

The Internet is fast

Fri, 17 Oct 2003 12:00:00 +0000

The Internet is fast.

Outgoing local calls are cheap

Mon, 12 May 2003 12:00:00 +0000

The cost of an outgoing local call (at least, as of today) is:
Rs 0.40 for landline-landline
Rs 0.80 for landline-WLL
Rs 1.20 for landline-cell
Rs 1.75 for cell-cell
Rs 1.99 for cell-landline
via ET

Mobile phones are sex toys

Mon, 14 Apr 2003 12:00:00 +0000

A new use for mobile phones.

IP Telephony

Fri, 22 Mar 2002 12:00:00 +0000

IP Telephony in India. At last.

ISPs to start offering Internet Telephony

Sun, 10 Mar 2002 12:00:00 +0000

All ISPs are going to start offering Internet Telephony pretty soon. Good.

The deaf use mobile phones

Mon, 11 Feb 2002 12:00:00 +0000

The deaf use mobile phones through SMS. Good idea.

Roaming rates cut

Thu, 31 Jan 2002 12:00:00 +0000

2 good things: roaming rates cut, bandwidth rates cut.

Morse code translator

Tue, 11 Dec 2001 12:00:00 +0000

.- - .-.. .- … - a morse code translator.

3G

Sat, 13 Oct 2001 12:00:00 +0000

I finally figured out what 3G is.

Convergence Bill

Tue, 28 Aug 2001 12:00:00 +0000

The Convergence Bill has finally been approved.

45 billion writedown

Fri, 03 Aug 2001 12:00:00 +0000

A $45 billion writedown from JDS Uniphase. The largest ever loss in corporate history.

WLL

Wed, 17 Jan 2001 12:00:00 +0000

The TRAI recommends that telephone companies could provide limited mobile services (WLL), and vice versa.

Mobile calls to become cheaper

Tue, 09 Jan 2001 12:00:00 +0000

Cellular calls will become cheaper. I might buy a phone.

Convergence bill delayed

Sat, 23 Dec 2000 12:00:00 +0000

Would someone please tell Sushma Swaraj to hurry up the Convergence Bill? Now we have to wait till the budget session!!

Net calls are legal

Mon, 18 Dec 2000 12:00:00 +0000

Phone calls through the Net are legal. This is based on the GOT-IT report.