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:
LEDs – Refer to
DSU LEDs
in Chapter 6,
Monitoring the DSU
.
SNMP Traps – For information on traps, refer to
Configuring SNMP Traps
in
Chapter 8,
Messages and Troubleshooting
.
Health and status messages and network performance statistics. Refer to
Chapter 6,
Monitoring the DSU
.
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 Y1Y Y N
No Signal (NS) Y1Y Y Y
Out of Service (OOS) Y1Y Y Y
Out of Frame (OOF) Y1Y Y Y
Excessive Bipolar Violations (BPV) Y1Y Y N
Inband Framing Error N Y Y N
DTR Off Y1Y N Y
1Link Up/Link Down Trap