Table of Contents
Advertisement
MX2800 STS-1 User Manual
Figure 5-11. Local VT-LOP Alarm Count Screen (24 Hour History)
Table 5-2
describes the alarm counts shown on the VT Statistics screens.
Condition
LOP
AIS
RDI
RFI
SLM
UEQ
The count given reflects the number of times the alarm or state has
occurred (rather than the number of seconds the alarm was active).
61204659L1-1A
Table 5-2. Alarm Count Descriptions
Description
The number of times the unit has failed to find a valid VT pointer.
The number of times the unit has received a path alarm indication signal.
VT-Path AIS is defined as all ones in bytes V1, V2, V3, and V4 as well as all
ones in the entire VT synchronous payload envelope. A VT-Path AIS failure is
declared when the VT-Path AIS defect persists for 2.5 ± 0.5 seconds.
Number of times the unit has received a VT path remote defect indication.
VT-RFI is declared when the incoming VT path RDI lasts for 2.5 ± 0.5 seconds.
Number of times the unit has received a VT path remote failure indication.
VT-RFI is declared when the incoming VT path RFI lasts for 2.5 ± 0.5 seconds.
The controller card is detecting a signal label mismatch in the VT path. A
received signal label is mismatched if the VT label does not indicate
"unequipped" (0) or "asynchronously mapped" (2).
The controller card detects that the VT path is unequipped (VT label is zero).
NOTE
Statistics, Section 5
Local VT Statistics
5-9
Advertisement
Table of Contents
