D-Link DSL-2540B User Manual - Page 21

Section 6 - Home Note: The Following settings are ISP dependant. For information regarding proper configuration, contact your ISP. VPI: Virtual Path Identifier. The valid range is 0 to 255. VCI: Virtual Channel Identifier. The valid range is 32 to 65535. Service Five classes of traffic are listed: Category: UBR Without PCR UBR service is suitable for applications that can (Unspecified Bit Rate without tolerate variable delays and some cell losses. Peak Cell Rate): Applications suitable for UBR service include text/ data/image transfer, messaging, distribution, and retrieval and also for remote terminal applications such as telecommuting. UBR With PCR (Unspecified UBR service is suitable for applications that can Bit Rate with Peak Cell tolerate variable delays and some cell losses. The Rate): Peak Cell Rate is a determining factor in how often cells are sent in an effort to minimize lag or jitter caused by traffic inconsistencies. CBR (Constant Bit Rate): Used by applications that require a fixed data rate that is continuously available during the connection time. It is commonly used for uncompressed audio and video information such as videoconferencing, interactive audio (telephony), audio / video distribution (e.g. television, distance learning, and pay-per-view), and audio / video retrieval (e.g. video-on-demand and audio library). Non Realtime VBR Can be used for data transfers that have critical response-time requirements such as airline reservations, (Non-Real-time banking transactions, and process monitoring. Variable Bit Rate): Realtime VBR (Real-time Used by time-sensitive applications such as real-time video. Rt-VBR service allows the network more flexibility Variable Bit Rate): than CBR. Quality of Can be enabled only for UBR without PCR, UBR with PCR, and Non Realtime VPR. Service: D-Link DSL-2540B ADSL2+ 4-Port Router User Manual 21