Fiber-Optic Link Around the Globe (FLAG) is a 28,000-kilometer-long optical fiber mostly-submarine communications cable that connects the United Kingdom, Japan, and many places in between. The cable is operated by India's Reliance Global com (renamed from Flag Telecom when it became a fully owned subsidiary of Reliance Communications). The system runs from the eastern coast of North America to Japan. Its Europe-Asia segment was the fourth longest cable in the world in 2008.
The FLAG cable system was first placed into commercial service in late 1997. FLAG offered a speed of 10 G bit/s and uses synchronous digital hierarchy technology. It carries over 120,000 voice channels via 27,000 km of mostly undersea cable. FLAG uses erbium-doped fiber amplifiers and was jointly supplied by AT&T Submarine Systems and K DD-Submarine Cable Systems. Its design, development, installation and service conformed to ISO 9000 quality standards. FLAG provided a link between the European end of high-density transatlantic crossings and the Asian end of the transpacific crossings.
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