HSSI | Article about HSSI by The Free Dictionary
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HSSI(High-Speed Serial Interface) A serial interface with transmission rates up to 52 Mbps. It is often used to connect one or more LAN routers and network devices to a T3 line, which provides 44.736 Mbps. A T3 multiplexor using HSSI can divide the T3 bandwidth into the appropriate speeds of the various devices.