Abstract
Telefonos de Mexico (TelMex) has embarked on a program to modernize its telecommunications network. At the heart of this modernization is a 13,500-kilometer optical fiber backbone that uses state-of-the-art technology. AT&T will provide about 60 percent of the required network for TelMex using dispersion-shifted fibers that operate at 1550 nanometers. The network will be installed to run at 565 megabits per second, with future upgrades possible to synchronous digital hierarchy optical network rates of 2.5 gigabits per second. The total turnkey system provided by AT&T includes optical fiber cable, splicing, installation, terminals, repeaters, training, maintenance, and documentation. This effort, which represents a collaboration among AT&T Network Systems-U.S.A., AT&T Network Systems International-Netherlands, AT&T Network Systems-Espana, and AT&T Mexico, is also the first example of AT&T-Espana and AT&T working together to satisfy the rigorous requirements of TelMex. When completed, this will be the largest long distance network in the world using dispersion-shifted fibers.
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