AT&T

The American Telephone and Telegraph corporation was established in 1885 as one of the leading long distance and local telephone company. AT&T was founded in 1983, located in Texas, USA. It is an US telecommunications corporation and founded as a subsidiary company of Bell Telephone Company to build long distance telephone lines. AT&T became a major change from the world's most prominent government regulated monopoly to the competitive enterprise. AT&T is one of the largest supplier of local and long distance telephone and Cell Phones services, Digital Subscriber Line Internet access and wireless service in United States.

In 2000 AT&T announced that a reconstituting into four publicly held companies, AT&T Wireless, AT&T Broadband, AT&T Customer and AT&T Business, each trading as a common stock. It was one of the world's largest communications network and the biggest cable operator in the US. The world quickly believed that the telephone as an essential part of the life. AT&T also produced the distinction among long and local distance phone calls, a staple of modern telecommunications. It had four distinguished businesses are cable, business, wireless and consumer and three rapidly developing networks are data, broadband and wireless. AT&T was adopted by SBC Corp., in 2005, which then changed its name to AT&T Inc.

AT&T Products Are :

• Telephone
• Wireless
• Internet and
• Television

AT&T long lines cable, microwave radio relay and wire network provided a long distance transport services to AT&T and its customers between 1940 and 1980. An advanced achievement, long lines provided computerized reconfiguration of microwave circuits coast to coast through AT&T's network in New York city. The company experimented with long distance coaxial cable in 1930s and the first long distance coaxial link in 1936 connected between philadelphia and New York. In 1984 long lines was renamed to AT&T Communications and AT&T divided its communications into some of the following companies are

• AT&T Communications of California
• AT&T Communications of Illinois
• AT&T Communications of Maryland
• AT&T Communications of Delaware
• AT&T Communications of NewYork
• AT&T Communications of Michigan
• AT&T Communications of New England

In 2004 AT&T wireless completed an amalgamation with the Cingular wireless to become the largest wireless carrier in the United States. In 2005 SBC communications bought AT&T corporation the parent company of AT&T communications. AT&T offers the following wireless services AT&T Managed Firewall Services provide an essential layer of network security.

AT&T wireless services:

• SMS
• MMS
• GPRS
• GSM
• AMPS
• D-AMPS
• UMTS