Vanguard Managed Solutions 7300 Series Manuel D’Utilisation

Vanguard 7300 Enclosures and Components 

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The T3/E3 Rear Transition Module offers four LEDs to provide operation and 
system status information:

Refer to Appendix B, Vanguard 7300 Cable Connectors and Pinouts for T3/E3 Rear 
Transition Module cabling.

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