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Introduction and Specifications
Diagnostics
You can use the loopbacks and tests to isolate system faults to a particular DTE, data set, or line.
Diagnostic testing performed through SNMP does not require intervention by personnel at remote
sites. The DSU facilitates fault isolation in a digital network by providing comprehensive loopback
tests listed below.
Table 1-1
SC 800 T3 Diagnostics
Line Loopback
Payload Loopback
Local Loopback
Local Loop with Self Test
DTE Loopback
Alarm Reporting
Alarms can be configured for reporting in the event of a wide variety of conditions, listed below.
You may mask or unmask all of the alarms except the Power Cycle alarm. The DSU also
accumulates alarm counts, which can be displayed by an SNMP controller.
Table 1-2
SC800 T3 Alarm Reporting
Alarm Type
Network Alarms
DTE Alarms
Threshold Alarms
Other Alarms
Note
For a detailed description of alarm reporting criteria, refer to Chapter 3.
1-4
Master Only
Remote Line Loopback
Remote Line Loopback with Self Test
Remote Payload Loopback
Remote payload with Self Test
Alarms
Loss Of Signal
Out Of Frame
Alarm Indication Signal
Remote Not Responding
Remote Alarm Indication
DTE Clock Loss
TMT Data No Transitions
RCV Data No Transitions (Not Supported)
DTE Ready Loss
DTE Test
Errored Seconds
Errored Seconds - Line
Severely Errored Seconds
Severely Errored Frame/AIS
Unavailable Seconds
Code Violations
Unsolicited Test
Configuration Change
Power Supply - Top/Bottom
SpectraComm 800 T3 Data Service Unit
Installation and Operation Manual
Product Overview
Master and Remote
End to End Test
076R160-000
Issue 4
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