Create a New WAN Connection — ATM PVC Configuration
To add a new connection for the WAN interface, click
Add
.
The ATM PVC Configuration screen follows 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
: Five classes of traffic:
o
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.
o
UBR With PCR (Unspecified Bit Rate with Peak Cell Rate)
o
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).
o
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.
o
Realtime VBR
(Real-time Variable Bit Rate
)
—used by time-sensitive applications
such as real-time video. Rt-VBR service allows the network more flexibility than CBR.
6219-X1 Router Users Guide
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