Carrier Access SNMP manual Control Panel LED Indications

Fault Isolation Procedures

Table 12-7: Control Panel LED Indications

Symptom	Corrective Action
All LED test and status indicators are	Indicates a loss of power or excessive voltage to the
OFF.	Access Bank II - SNMP. To correct the problem:
	1 Verify that the Power Conversion Cube is plugged
	into an active AC outlet and the power switch on the
	power converter is turned on.
	2 Check the circuit breaker on the Power Conver-
	sion Cube.
	3 If you are using an external -48 Vdc power source,
	check the applied voltage. If the applied voltage is
	incorrect (e.g., greater than -70 Vdc), disconnect the
	external voltage source and correct its voltage output
	level. The Access Bank II - SNMP circuitry will
	automatically reset.
	4 If the problem persists, the Access Bank II -
	SNMP power supply on the Controller card has
	failed. Replace the Controller card following the pro-
	cedure given in the Maintenance section.
T1 Span 1 or 2 LED is RED.	The Access Bank II - SNMP is not receiving a T1
	signal from the line indicated. To correct this condi-
	tion:
	1 Check the T1 interface cable at the RJ-48C jack
	and at the carrier demarcation jack. Ensure that the
	cable is properly plugged in. If so, go to Step 2.
	2 Run a Self Test. If the affected T1 Test LED comes
	up green, replace the T1 cable. If the problem per-
	sists contact the service provider.

Table 12-8: Control Panel LED Indications (continued)

Symptom	Corrective Action
T1 Span 1 or 2 LED is YELLOW.	. Bipolar Violations (BPVs) are being received
	from the network. A 1-second flash indicates
	that at least one BPV was received during a 1-
	second interval. To correct this problem:
	1 Verify the T1 Line Code 1 or 2 option selected
	matches the line coding sent by the carrier.
	2 If the Line Code option is set correctly and the
	problem persists, contact your service provider.

9/24/01 12-15