The telephone or phone (Greek: tele = far away and phone = voice) is a telecommunications device which is used to transmit and receive sound (most commonly voice and speech) across distance. Most telephones operate through transmission of electric signals over a complex telephone network which allows almost any phone user to communicate with almost any other.

Introduction

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An elementary telephone system would consist of three elements:

• the equipment located at each subscriber which converts sound to electrical signals and back, and which allows the subscriber to answer or initiate a call,
• a central switching facility which interconnects all the subscribers
• wiring or other means to connect the subscriber to the central switching facility. There are three principal ways a subscriber may be connected to the telephone network:
  • Historically, and still very commonly, by dedicated physical wire connections run in overhead or underground cables;
  • By radio, as in a cordless, cellular, satellite or radiotelephone and
  • By voice over internet protocol (VoIP) telephones, which use broadband internet connections.
  More on [ Telephone ]

The Economist: Telecommunications

Alcatel-Lucent: Goodbye and adieu
Thu, 31 Jul 2008 12:10:21 -0000
The architects of a big telecoms-equipment merger decide to hang upWHEN Alcatel, a French maker of telecoms equipment, announced its plan in 2006 to merge with Lucent, an American rival, reactions were mixed. There was general agreement that bigger was better and that the combined firm would benefit from greater geographical reach. But there was also scepticism that its French and American managers would be able to get along. With good reason, it seems: on July 29th Alcatel-Lucent announced its sixth consecutive quarterly loss and the resignations of Serge Tchuruk, its French chairman, and Patricia Russo, its American chief executive. Their firm's troubles stem in large part from its internal clash of cultures.This clash was an unhelpful distraction, given that the entire telecoms-equipment industry is suffering. The bonanza of 2000-05, when European operators upgraded their mobile-phone networks to new "third-generation" (3G) technology, is winding down. Sales growth is slowing, and even Ericsson, the industry leader, has seen its share price fall by 50% in the past year. Margins have also been squeezed by the rise of Huawei and ZTE, two Chinese firms. Their prices are sometimes 40-50% lower than those of Western vendors. ...
Tech.view: Home warriors
Fri, 25 Jul 2008 07:24:51 -0000
Telecommuters need more than e-mail and a broadband connectionTHE best thing about being a foreign correspondent is not having to commute to the office every day, attend dreary meetings, dress soberly, and generally get distracted from the nitty-gritty of doing the job. The worse thing is being out of touch with colleagues at head office, with little say over how your stories are treated. But if you can handle the patchy feedback and total lack of control, the freedom pays dividends in productivity and sheer job satisfaction.Being one of the most portable jobs on the planet, journalism provides a daily reminder that work is something you do, not some place you go to. For the past quarter of a century, your correspondent has smirked about the time and energy he's saved through not having to travel to work. ...
Tech.view: Home warriors
Fri, 25 Jul 2008 07:24:51 -0000
Telecommuters need more than e-mail and a broadband connectionTHE best thing about being a foreign correspondent is not having to commute to the office every day, attend dreary meetings, dress soberly, and generally get distracted from the nitty-gritty of doing the job. The worse thing is being out of touch with colleagues at head office, with little say over how your stories are treated. But if you can handle the patchy feedback and total lack of control, the freedom pays dividends in productivity and sheer job satisfaction.Being one of the most portable jobs on the planet, journalism provides a daily reminder that work is something you do, not some place you go to. For the past quarter of a century, your correspondent has smirked about the time and energy he's saved through not having to travel to work. ...
Telecoms in Mexico: Slim?s pickings
Thu, 10 Jul 2008 13:30:55 -0000
More competition should help to drive down exorbitant phone chargesIT HAS become quaint, in the era of Skype and unlimited calling plans, to worry too much about the cost of phone calls. But it is a textbook case of the old saying: "Them as has, gets". The well-connected executive can use any number of voice-over-internet services to make free calls; but the rural poor, if they have phones at all, must pay high rates. Perhaps nowhere is this more true than in Mexico, where Carlos Slim, by some estimates the world's richest man, dominates the telecoms industry. He controls Telmex, which has 81% of the fixed-line market, and Telcel, which has 72% of the mobile market. In the first quarter of 2008 Telmex had a profit margin before interest, taxes, depreciation and amortisation of 48.7%; for Telcel the figure was 52.1%.This is well above the global average for telecoms firms of 35%, says Martin Lara, an analyst at Vector Casa de Bolsa, a research firm. Base tariffs have fallen in Mexico in recent years, but they do not include things like international calls or calls to mobile phones. Competition has not helped much, because smaller firms have been reluctant to undercut Mr Slim's companies by very much--and high prices boost their profits, too. "No one wants to destroy these profits overnight," says Mr Lara. ...
Telecoms in Mexico: Slim?s pickings
Thu, 10 Jul 2008 13:30:55 -0000
More competition should help to drive down exorbitant phone chargesIT HAS become quaint, in the era of Skype and unlimited calling plans, to worry too much about the cost of phone calls. But it is a textbook case of the old saying: "Them as has, gets". The well-connected executive can use any number of voice-over-internet services to make free calls; but the rural poor, if they have phones at all, must pay high rates. Perhaps nowhere is this more true than in Mexico, where Carlos Slim, by some estimates the world's richest man, dominates the telecoms industry. He controls Telmex, which has 81% of the fixed-line market, and Telcel, which has 72% of the mobile market. In the first quarter of 2008 Telmex had a profit margin before interest, taxes, depreciation and amortisation of 48.7%; for Telcel the figure was 52.1%.This is well above the global average for telecoms firms of 35%, says Martin Lara, an analyst at Vector Casa de Bolsa, a research firm. Base tariffs have fallen in Mexico in recent years, but they do not include things like international calls or calls to mobile phones. Competition has not helped much, because smaller firms have been reluctant to undercut Mr Slim's companies by very much--and high prices boost their profits, too. "No one wants to destroy these profits overnight," says Mr Lara. ...

BBC News | Business | World Edition

Eurozone rates on hold at 4.25%
Thu, 07 Aug 2008 14:05:03 -0000
The European Central Bank maintains eurozone interest rates at 4.25% after its latest meeting.
US retail sales struggle in July
Thu, 07 Aug 2008 15:09:49 -0000
Results from US retailers show disappointing sales in July, with the outlook between now and September looking poor.
Citigroup reaches SEC settlement
Thu, 07 Aug 2008 16:03:16 -0000
Citigroup is to buy back billions of dollars worth of securities, following a probe by the US financial regulator.

NYT > World Business

Interest Rates Kept Steady in Europe
Thu, 07 Aug 2008 21:04:22 -0000
The European Central Bank and the Bank of England on Thursday left their benchmark interest rates unchanged.
Truck Sale Slump Weighs on Toyota
Thu, 07 Aug 2008 20:18:23 -0000
The automaker said that its worldwide net income for the quarter fell 28 percent, hurt by slumping sales of its Tundra pickup truck and S.U.V.’s made and sold in North America.
Allianz Struggles to Find Dresdner Buyer
Thu, 07 Aug 2008 21:45:19 -0000
A sale of Dresdner, the banking unite of the German insurance company, is considered a crucial step in the consolidation of the German banking sector.

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