TP-Link TL-PA201 User Guide - Page 26

TL-PA201 200Mbps Powerline Ethernet Adapter 4.3 QoS The third tabbed window, labeled 'QoS' for Quality of Service, is shown in Figure. QoS requirements are different for various data types such as streaming video or music, voice and raw data. To provide higher QoS for streaming data, priority levels can be set using tags at the beginning of data frames. Virtual Local Area Network (Vlan) 802.1p priority tags on Ethernet frames are used to specify 8 (0~7) levels of 'user priority'. Homeplug AV powerline allows for 4 levels of Channel Access Priority CAP(0-3)). Therefore, the 8 levels of VLAN Ethernet tags must be mapped to the 4 levels of CAP priority, where CAP 3 is the highest priority and CAP 0 is the lowest. CAP 3 priority might be used for voice and network management frames, CAP 2 is used for streaming video-and must while CAP 1 can CAP 0 are used for data. Mapping VLAN tags to CAP levels is easily done using the VLAM Priority Mapping function on the QoS tab window. Simple Application Mapping: The group allows you to choose what type of traffic with the highest user priority you will use your local HomePlug device for by pitching on one of the following four radios. Please select the radio type according to your demand. Advanced VLAN Priority Mapping: The group sets VLAN priority to CAP mapping and default priority. Note that in HomePlug, CAP 3 is the highest priority while CAP 0 is the lowest priority. The values shown in VLAN Tags Priority are the default settings for the first running. 4.4 Diagnostics The Diagnostics homepage shows the System Information and Remote Device History of all remote devices seen over a period of time which are only readable. Click on the "Diagnostics" tab and the following screen display. 21