D-Link DIS-300G-14PSW Product Manual - Page 32
ActiPHY, PerfectReach, EEE Urgent Queues
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ActiPHY PerfectReach EEE EEE Urgent Queues Link down power savings enabled. ActiPHY works by lowering the power for a port when there is no link. The port is power up for short moment in order to determine if cable is inserted. Cable length power savings enabled. PerfectReach works by determining the cable length and lowering the power for ports with short cables. Controls whether EEE is enabled for this switch port. For maximizing power savings, the circuit isn't started at once transmit data is ready for a port, but is instead queued until a burst of data is ready to be transmitted. This will give some traffic latency. If desired it is possible to minimize the latency for specific frames, by mapping the frames to a specific queue (done with QOS), and then mark the queue as an urgent queue. When an urgent queue gets data to be transmitted, the circuits will be powered up at once and the latency will be reduced to the wakeup time. Queues set will activate transmission of frames as soon as data is available. Otherwise the queue will postpone transmission until a burst of frames can be transmitted. Buttons Click to save changes. Click to undo any changes made locally and revert to previously saved values. 32