Telephone - Telephone operating companies

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. Telephone - Introduction. There are four principal means by which an end user using a telephone handset may connect to a telephon ...

Including:

• Telephone - Introduction
• Telephone - History
• Telephone - Early development
• Telephone - Later history
• Telephone - Digital Telephony
• Telephone - Wireless phone systems
• Telephone - Cordless telephone
• Telephone - Cellular phone
• Telephone - Cordless/mobile phone
• Telephone - VoIP Telephony
• Telephone - Telephone equipment research labs
• Telephone - Telephone operating companies
• Telephone - Trivia
• Telephone - Telephone equipment
• Telephone - Telephone equipment manufacturers
• Telephone - Telephone technology
• Telephone - Telephone system organization and structure
• Telephone - Telephone hacking and exploitation
• Telephone - US-specific terminology
• Telephone - Telephone terminology
• Telephone - Telephone Standards
• Telephone - Patents

Read more here: » Telephone: Encyclopedia - Telephone

There are four principal means by which an end user using a telephone handset may connect to a telephone network: a traditional fixed phone "landline", which uses dedicated physical wire connections connected to a single location; wireless and radio telephones, which use either analog or digital radio signals; satellite telephones, which utilize telecommunications satellites; and voice over internet protocol (VoIP) telephones, which use broadband internet connections. Between end users, transmissions across a network may be carried by fiber optic cable, po ...

See also:

Telephone, Telephone - Introduction, Telephone - History, Telephone - Early development, Telephone - Later history, Telephone - Digital Telephony, Telephone - Wireless phone systems, Telephone - Cordless telephone, Telephone - Cellular phone, Telephone - Cordless/mobile phone, Telephone - VoIP Telephony, Telephone - Telephone equipment research labs, Telephone - Telephone operating companies, Telephone - Trivia, Telephone - Telephone equipment, Telephone - Telephone equipment manufacturers, Telephone - Telephone technology, Telephone - Telephone system organization and structure, Telephone - Telephone hacking and exploitation, Telephone - US-specific terminology, Telephone - Telephone terminology, Telephone - Telephone Standards, Telephone - Patents

Read more here: » Telephone: Encyclopedia II - Telephone - Introduction

Also known as Internet telephony or Voice over IP (VoIP), digital telephony is a disruptive technology that is rapidly replacing traditional telephone networks. In Japan and Korea up to 10% of subscribers, as of January 2005, have switched from analog to digital telephone service. A recent Newsweek article suggested that Internet telephony may be "the next big thing." [2] Digital telephones use a broadband Internet connection to transmit conversations as data packets. In addition to replacing the PSTN, digital telephony is also compet ...

See also:

Telephone, Telephone - Introduction, Telephone - History, Telephone - Early development, Telephone - Later history, Telephone - Digital Telephony, Telephone - Wireless phone systems, Telephone - Cordless telephone, Telephone - Cellular phone, Telephone - Cordless/mobile phone, Telephone - VoIP Telephony, Telephone - Telephone equipment research labs, Telephone - Telephone operating companies, Telephone - Trivia, Telephone - Telephone equipment, Telephone - Telephone equipment manufacturers, Telephone - Telephone technology, Telephone - Telephone system organization and structure, Telephone - Telephone hacking and exploitation, Telephone - US-specific terminology, Telephone - Telephone terminology, Telephone - Telephone Standards, Telephone - Patents

Read more here: » Telephone: Encyclopedia II - Telephone - VoIP Telephony

The very early history of the telephone is a confusing morass of claim and counterclaim, which was not clarified by the huge mass of lawsuits which hoped to resolve the patent claims of individuals. There was a lot of money involved, particularly in the Bell Telephone companies, and the aggressive defense of the Bell patents resulted in much confusion. Additionally, the earliest investigators preferred publication in the popular press and demonstration to investors instead of scientific publication an ...

See also:

Telephone, Telephone - Introduction, Telephone - History, Telephone - Early development, Telephone - Later history, Telephone - Digital Telephony, Telephone - Wireless phone systems, Telephone - Cordless telephone, Telephone - Cellular phone, Telephone - Cordless/mobile phone, Telephone - VoIP Telephony, Telephone - Telephone equipment research labs, Telephone - Telephone operating companies, Telephone - Trivia, Telephone - Telephone equipment, Telephone - Telephone equipment manufacturers, Telephone - Telephone technology, Telephone - Telephone system organization and structure, Telephone - Telephone hacking and exploitation, Telephone - US-specific terminology, Telephone - Telephone terminology, Telephone - Telephone Standards, Telephone - Patents

Read more here: » Telephone: Encyclopedia II - Telephone - History

While the term "wireless" means radio and can refer to any telephone that uses radio waves it is primarily used for cell phones. In the United States wireless companies tend to use the term wireless to refer to a wide range of services while the cell phone itself is called a mobile phone, mobile, cell phone or simply cell with the trend now moving towards mobile. The changes in terminology is partially due to providers using different terms in marketing to differentiate newer digital services from older anal ...

See also:

Telephone, Telephone - Introduction, Telephone - History, Telephone - Early development, Telephone - Later history, Telephone - Digital Telephony, Telephone - Wireless phone systems, Telephone - Cordless telephone, Telephone - Cellular phone, Telephone - Cordless/mobile phone, Telephone - VoIP Telephony, Telephone - Telephone equipment research labs, Telephone - Telephone operating companies, Telephone - Trivia, Telephone - Telephone equipment, Telephone - Telephone equipment manufacturers, Telephone - Telephone technology, Telephone - Telephone system organization and structure, Telephone - Telephone hacking and exploitation, Telephone - US-specific terminology, Telephone - Telephone terminology, Telephone - Telephone Standards, Telephone - Patents

Read more here: » Telephone: Encyclopedia II - Telephone - Wireless phone systems