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Error Detection 5-1
Chapter 5
Diagnostics
This chapter describes the ASM-60 diagnostic functions, which include:
• Status indications, alarms, power-up self-test
• VDSL performance diagnostics
• LED testing.
5.1 Error Detection
This section explains how to detect and fix errors and other problematic conditions
in ASM-60.
Power-Up Self-Test
ASM-60 performs a hardware self-test upon turn-on. The self-test sequence checks
the critical circuit functions of the modem.
Front-Panel LEDs
The status of ASM-60 is indicated by the ALM, SYNC A and SYNC B indicators
located on the front panel. For the description of LEDs and their functions, refer to
Chapter 3.
Alarms
ASM-60 maintains two alarm buffers: temporary (up to 20 alarms) and permanent
(up to 100 alarms). The temporary alarm buffer is displayed by the ASM-60
management software as Alarms screen (see Figure 5-1), and the permanent alarm
buffer as Log File (see Figure 5-2).
An alarm enters simultaneously both Alarms display and log file, and the ALM LED
turns on to indicate the condition. But once the event that caused the alarm is
cleared, the alarm is removed from the temporary buffer, but it remains in the log
file, enabling you to view the alarm history.
Working with the Temporary Alarms Buffer
To access the Alarms screen:
1. From the Main menu, type 2.
The Display menu appears.
2. From the Display menu, type 2.
The Alarms screen appears (Figure 5-1).
Main Menu
↓ 2
Display
↓ 2
Alarms