4
D-Link DSL-30B ADSL+ Ethernet/USB Modem User Manual
Section 7 - 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 55.
VCI:
Virtual Channel Identifier. The valid range is 3 to 65535.
Service
Category:
Five classes of traffic are listed:
UBR Without PCR
(Unspecified Bit Rate
without Peak Cell Rate):
(
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):
CBR (Constant Bit Rate):
(
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
(Non-Real-time
Variable Bit Rate):
(
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 (Real-time
Variable Bit Rate):
(
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.
Quality of
Service:
Can be enabled only for UBR without PCR, UBR with PCR, and Non Realtime VPR.
(
Unspecified Bit Rate with Peak Cell Rate
) UBR
service is suitable for applications that can tolerate
variable delays and some cell losses. The 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.
Содержание DSL-2320B
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