ADTRAN 2 x E1 user manual ALM is Lit, No Power Light

61280004L2-1C

Section 4 Troubleshooting

I M P O R T A N T

If problems persist after you have followed the Recommended Actions, contact ADTRAN Technical Support at (011) 256-963-8716.

ALM is Lit

When the ALM light is on (solid), it indicates reception of an UA1 signal at the E1 interface. If the “ALM” is blinking, it indicates an RRA alarm has been received.

	Recommended Action
Possible Cause	(see list below)

• TRACER has received an unframed all 1s signal from the E1 input…...... 1

•TRACER has received a Received Remote Alarm (RRA) signal from

	the E1 input	1
Recommended Action
1.	Check E1 equipment for error conditions.
No “Power” Light
		Recommended Action
Possible Cause		(see list below)
•	DC voltage is not applied	1,2,4
•	The polarity of the power connection is reversed	2
•	The AC transformer is not functioning properly	3,4

•The AC transformer is not connected to the DC jack on the BBP,

or not connected to AC outlet 3,4

Recommended Actions:

1.Verify that the DC voltage is between 21-60 VDC (±).

2.Verify that negative voltage is applied to the negative terminal, and positive voltage applied to the positive terminal.

3.Verify that the “Power” light is lit on the AC transformer.

4.Verify that the AC transformer is connected to an AC power cord on the transformer and connected to the DC jack on the BBP. Verify that the AC power cord is connected to an AC outlet. Verify that the AC outlet has proper AC voltage present.

34 TRACER 2 x E1 User’s Manual