TriplePlay
User Manual
27
Version 1.0
Document #: BD-TU0001-10
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 are listed—
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).
