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7-1
7610-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 the
DSU LEDs
section in Chapter 6.
H SNMP Traps – For information on traps, refer to the
Configuring SNMP Traps
section in Chapter 8.
H Health and status messages and network performance statistics. Refer to
Monitoring the DSU
, Chapter 6.
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
ASCII Alarm
(if configured)
Alarm
LED
Specific
LED
Crossed Pairs Y
1
Y Y Y N
No Signal (NS) Y
1
Y Y Y Y
Out of Service (OOS) Y
1
Y Y Y Y
Out of Frame (OOF) Y
1
Y Y Y Y
Excessive Bipolar
Violations (BPV)
Y
1
Y Y Y N
Inband Framing Error N Y Y Y N
DTR Off Y
1
Y N N Y
1
Link Up/Link Down Trap
To configure ASCII Alarms, use the Alarms & Traps options screen. Refer to
Alarms & Traps Options, Table A-8. For additional information regarding ASCII
alarm generation, refer to the
Alarm Messages
section of Chapter 8.