VeEX RXT-6000e, User Manual

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9.5 TCM Tasks (Tandem Connection Monitoring)
Tap the TCM Tasks icon to display the screen shown below.
TCM Tasks
Results are available for up to six tandem connections. The counts are numbers of seconds containing the error or
indication.
Tandem connections and corresponding source and sink functions are defined in ITU-T G.707, G.709, and G.783.
TCM enables the user and its signal carriers to monitor the quality of the traffic that is transported between segments
or connections in the network. SONET/SDH allowed a single level of TCM to be configured, while ITU G.709 allows
six levels of tandem connection monitoring to be configured. The assignment of monitored connections is currently a
manual process that involves an understanding between the different parties. There are various types of monitored
connection topologies: cascaded, nested, and overlapping.
LTC:
Loss of Tandem Connection Signal
OCI: Open Connection Indication
AIS: TC Alarm Indication Signal
LCK: Locked Defect
BDI:
Backward Defect Indication
IAE: Incoming Alignment Error
BIAE: Backward Incoming Alignment Error
BEI: TC Backward Error Indication
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