Wan - D-Link DSL-2500U User Manual

WAN

Configure the WAN settings as provided by your ISP.
Click on the Add button if you want to add a new connection for the WAN interface
and to proceed to the ATM PVC Configuration screen as seen below. The ATM PVC
Configuration screen allows you to configure an ATM PVC identifier (VPI and VCI)
and select a service category.
Find out the following values from your ISP before you change them.
•
VPI: Virtual Path Identifier. The valid range is 0 to 255.
•
VCI: Virtual Channel Identifier. The valid range is 32 to 65535.
•
Service Category:
UBR Without PCR
o
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
o
CBR (Constant Bit Rate)—used by applications that require a fixed
o
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
o
for data transfers that have critical response-time requirements
such as airline reservations, banking transactions, and process
Five classes of traffic are listed—
(Unspecified Bit Rate without Peak Cell Rate)—
(Unspecified Bit Rate with Peak Cell Rate)--
(Non-Real-time Variable Bit Rate)—can be used
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