D-Link DSL-2540T User Manual page 84

DSL-2540T ADSL Router User Guide
priority queues (2 to 4) will not be allowed to forward packets until all of the Voice packets have been sent from the
priority 1 queue.
If you select User Define in the Classified by drop-down menu, the following window appears.
QoS Configuration window IP QoS for User Define
On this window, you can assign a weight, on a percentage basis, to each of the four priority queues. In addition, you can
specify the number of bytes from the beginning of a given packet's IP header to set a pointer. From this pointer, you can
then specify a Value (in hexadecimal) and a Mask (in hexadecimal) for the router to match when examining packets
crossing the specified priority queue. It is recommended that you not enter a QoS scheme of this type unless you fully
understand Offsets, pointers, masks, and IP headers or you are instructed to do so by your ISP.
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