User manual

Diagnostics & Troubleshooting
LED Test and Status Indicators
7-6 July 2004 Wide Bank 28 DS3 - Release 2.4
Low-Speed DS1/E1 Line Status LEDs (one per span)
All DS1 and E1 low-speed circuit cards have four LEDs, though E1 cards use only the first three
and the fourth remains off. Primary low-speed circuits are numbered 1 through 28, and spares are
numbered 1 through 4. When a primary circuit switches to a spare, the primary status LED turns off
and the spare LED lights.
Ethernet Status LED
This LED is located on the rear connector panel.
State Meaning
OFF Off-line
GREEN Normal Operation
RED Loss of Signal (LOS) or
Metallic Loopback
RED FLASHING Self Test Fail
YELLOW Equipment or Line Loopback
YELLOW FLASHING Line Code Violations
State Meaning
OFF No Link (no power)
GREEN Link OK (connected)
Low Speed Status LEDs
Spares (1-4)
1-4 5-8 25-2821-249-12 13-16 17-20
LED