Asus AM602 User Manual page 24

WL-AM602 Combo Router User Manual
POWER STATUS ACT LAN USB
2. Configure an ATM PVC identifier (VPI and VCI) and select a service category.
Check with your ISP before you configure VPI, VCI, and the service category.
• VPI: Virtual Path Identifier. The valid range is 0 to 255.
• VCI: Virtual Channel Identifier. The valid range is 32 to 65535.
• Service Category: Five classes of traffic are listed below:
UBR Without PCR (Unspecified Bit Rate without Peak Cell Rate): UBR
service is suitable for applications that can tolerate variable delays and some
cell losses. 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 Bit Rate with Peak Cell Rate): The amount of
bandwidth is characterized by a Peak Cell Rate (PCR). UBR with PCR is
connections that transport variable bit rate traffic for which there is no reliance
on time synchronization between the traffic source and destination and under
the Peak Cell Rate.
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
video conferencing, interactive audio (telephony), audio/video distribution
such as television, distance learning, and pay-per-view, and audio/video
retrieval such as video-on-demand and audio library.
Non Realtime VBR (Non-Real-time Variable Bit Rate): Can be used for data
transfers that have critical response-time requirements such as airline
reservations, banking transactions, and process monitoring.
Realtime VBR (Realtime Variable Bit Rate): Used by time-sensitive
applications such as real-time video. Rt-VBR service allows the network
more flexibility than CBR.
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