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7-1
7612-A2-GB20-10
November 1997
Testing
7
Detecting Problems
The DSU can detect and report problem conditions and perform diagnostic tests.
The DSU offers a number of indicators to alert you to possible problems:
H LEDs – Refer to
DSU LEDs
in Chapter 6,
Monitoring the DSU
.
H SNMP Traps – For information on traps, refer to
Configuring SNMP Traps
in
Chapter 8,
Messages and Troubleshooting
.
H Health and status messages and network performance statistics. Refer to
Chapter 6,
Monitoring the DSU
.
H Alarm Condition Indications.
The following table shows the available indicators of alarm conditions on the
network interface and the User Data port.
Alarm Condition
SNMP
Trap
ATI Status
Screen
Alarm
LED
Specific
LED
Crossed Pairs Y
1
Y Y N
No Signal (NS) Y
1
Y Y Y
Out of Service (OOS) Y
1
Y Y Y
Out of Frame (OOF) Y
1
Y Y Y
Excessive Bipolar Violations (BPV) Y
1
Y Y N
Inband Framing Error N Y Y N
DTR Off Y
1
Y N Y
1
Link Up/Link Down Trap