ADC AVIDIA SWD4573I1 - Manual (Page 498)

Adding a Frame Relay Configuration
472 Avidia System Configuration and Management User Manual
d In the Error Threshold box, type the error threshold value. The valid range is 1 to 10, with
3 as the default.
Error Threshold is the number of consecutive poll intervals in which the LMI status
inquiry messages are not received that are required for the link to be declared down.
e In the Monitor Events box, type the monitor events value. The valid range is 1 to 10, with
4 as the default.
Monitor Events is the number of poll intervals in which the LMI status inquiry
messages are not received that are required for the link to be declared down.
6 In the Circuit row, do the following:
a In the Traffic Type box, select the traffic class.
UBR (Unspecified Bit Rate)—This is a best-effort class of traffic that is best suited for
LAN. When network congestion occurs, the data is stored in a buffer until it can be
sent.
CBR (Constant Bit Rate)—This traffic class carries a guaranteed constant bandwidth.
It is best suited for applications that require fixed bandwidth, such as uncompressed
voice, video, and circuit emulation. CBR is a Quality of Service class defined by the
ATM Forum for ATM network.
rt-VBR (real-time Variable Bit Rate)—This traffic class carries a variable bandwidth. It
is well suited for real-time services such as compressed voice and video which require
stringent cell transfer latency and less bursty traffic. It is not well suited for LAN traffic
due to the unpredictability of LAN traffic burst size.
nrt-VBR (non-real-time Variable Bit Rate)—This traffic class carries variable
bandwidth. It is well suited for data services such as frame relay over ATM which
requires guaranteed bandwidth and lower Quality of Service. It is not well suited for
LAN traffic due to the unpredictability of LAN traffic burst size.
b In the DLCI box, type the data link connection identifier. The valid range is 16 to 991,
with 16 as the default.
The DLCI is the logical channel a data frame travels from the transmitted device to the
destination device.
c In the Excess Burst box, type the excess burst value in data bits. The valid range is 0 to
144000, with 144000 as the default.
Excess Burst is the maximum number of uncommitted data bits that the network will
attempt to deliver.