Troubleshooting guide

MX2820 System Manual
1-10 61186003L1-1D
• Detects and indicates DS3 alarm and loopback conditions
• Local or loop timing modes
• Operates over temperature range of –40°C to +50°C (no fans), –40°C to +65°C (with fans)
• Manual and remote-initiated line and terminal loopback modes
• Reports alarms to SCU
• Supports downloading of FLASH program data from the SCU
• Front panel indication of Active, Alarm, DS3, and DS1 status
• NEBS Level 3, UL60950, GR-1089-CORE compliant
• Hot swappable
• Derives power from redundant VDC supplied to the shelf
• Simplified configuration through the VT100 terminal menu structure
M13 MUX Front Panel LEDs
Table 1-2 provides a description of each LED state for the Active M13 MUX module.
Table 1-2. MX2820 M13 MUX LED Descriptions
LED State Description
ACT
Solid Green
Alternating Green/Amber
Solid Red
Solid Amber
Alternating Red/Amber
Flashing Red
Everything is okay and operating normally
Normal and console open
Self-test failed
Software update in progress
Self-test failed and console open
MUX Module has failed
ALM
Solid Green
Solid Red
Flashing Red
No critical, major, or minor alarms
Major or minor alarm in progress
Critical alarm in progress
DS3 STAT
Solid Green
Solid Red
Flashing Red
One-second Red
Alternating Red/Green
Normal (DS3 okay)
AIS, OOF, RAI, Idle alarms
DS3 LOS or DS3 failure (critical)
A single DS3 line code violation or burst of DS3 line code
violations just occurred
DS3 XCV threshold exceeded