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The Stinger FS chassis is the largest model in the carrier-class Stinger DSL access concentrator product family. Within its force-air-cooled interior, this chassis houses a variety of easily removable, tightly integrated modules. A single Stinger FS supports up to 672 ports. Additional Stinger chassis can be subtended or daisy-chained to support thousands of subscribers in a sinble central office rack, providing the highest DSL densities in the industry.