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Vanguard 7300 Enclosures and Components 2-31
Vanguard 7300 Cards
Rear Panel LEDs The T3/E3 Rear Transition Module offers four LEDs to provide operation and
system status information:
Cabling Refer to Appendix B, Vanguard 7300 Cable Connectors and Pinouts for T3/E3 Rear
Transition Module cabling.
LED Color Indication
CSU - Status Amber • OFF - The module has failed internal startup check
• ON - Normal module operation
• Flashing - loopback is active (internal or line)
Rx - Status Amber • OFF - The module is currently booting and not active
• ON - Normal receive
• Flashing - Receive failure state. The number of flashes between
pauses indicates these types of errors:
– 1 = Alarm Indication Signal (AIS) if received for 2 seconds. If
absent for 10 seconds, the signal is gone
– 2 = IDLE (T3/E3)
– 3 = Remote Alarm Indicator (RAI) if received for 1 second. If
absent for 1 second, the signal is gone
– 4 = Loss of Frame (LOF) or Out of Frame (OOF) if received for
2 seconds. If absent for 10 seconds, the signal is gone
– 5 = Loss of Signal (LOS) if received for 2 seconds. If absent for
10 seconds, the signal is gone
– 6 = Loss of Lock (LOL) if received for 2 seconds. If absent for
2 seconds, the signal is gone
LCD - State Amber • OFF - Normal ATM cell delineation
• ON - Loss of cell delineation
USR - Manually Set Amber • OFF - Not Used