The HS-Link is a high-speed serial interconnect technology. The current implementations are specified to operate at serial line speeds between 700 MBaud and 1 GBaud. HS-Links are intended to be used as a high-speed interconnect between chips on a printed-circuit board, between printed circuit boards over a backplane or between racks using coaxial cable connections. The connection length for the specified coaxial cable is limited to 5 meters due to the cable attenuation. Transmission over single-mode and low-cost multimode fibre optic cable is also possible, the length of the link over which the full data rate can be sustained is then restricted by the amount of buffering for the flow-control protocol (see 2.4).