Overhead Analyzer:
Displays the Section/Line Overhead (TOH) and STS Path Overhead (POH) bytes of the received
channel.
Overhead Generator:
Used to edit Section/Line Overhead (TOH) and STS Path Overhead (POH) bytes of the received
channel.
Pointer Tasks:
Displays both STS and VT pointer values and generates STS and VT pointer movements. Pointer sequences
according to Bellcore GR.253 recommendations are also possible.
Trace Identifier:
Used to generate and edit J0, J1 and J2 path traces and set expected trace for received channel according
to G.831 recommendations.
Payload Labels:
Used to set the C2 and V5 Path Signal Labels which indicate the content of the STS path and VTs.
APS Testing:
Used to measure Automatic Protection Switching limits. Using selectable triggers, the drop out times of tributary
connections are measured and compared with preset values.
TCM Tasks:
Used to analyze or edit the sequence of Z5 and Z6 TCM bytes by generating alarms and errors in the Tandem
connection sub-layer.
Tributary Scan:
Used to scan individual or multiple tributaries to verify routing and error free operation. available in VT-1.5 or
VT-2mode
Round Trip Delay( Propagation Delay):
Measurement works by sending a test pattern. A bit errors are transmitted in the
pattern. The time it takes for the error to reach the receiver is the propagation time through the network.
10.1 SONET Functions > Overhead Analyzer
Tap the Overhead Analyzer icon to display the OH screens shown below. There are tabs for;
- TOH Rx which displays the bytes associated with the Section/LINE Overhead
- POH Rx which displays the bytes associated with the Path Overhead
- Summary which displays the Path Traces (J0, J1, J2), APS (K1, K2), Synchronization status (S1), and STS Path
(C2) and VT Path (v5) Signal Label bytes
TX150 e-Manual D07-00-023 Rev A02
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