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Equipment los, Power on - self check failure, Eprom checksum failure – ADTRAN T1 CSU ACE User Manual

Page 36: Maintenance

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Chapter 3. Troubleshooting and Maintenance

36

T1 CSU ACE User Manual

61202022L1-1B

Equipment LOS

Condition: EQ LOS LED is illuminated.

1.

Verify that the cable from the CPE is in the

CPE

modular jack on

the bottom/end of the CSU ACE.

2.

If all connections seem intact, use a BERT test set in the

NET IN

and

NET OUT

jacks to test the CPE.

Power On - Self Check Failure

Condition: NET LOS, EQ LOS, NET LB, and EQ LB all flash in uni-
son, continuously.

The unit has failed its internal self check. Return the unit to the
ADTRAN Customer and Product Service (CAPS) Department as
instructed on page 12.

EPROM Checksum Failure

Condition: NET LOS and EQ LOS Flash alternately with NET LB
and EQ LB for the first 10 seconds after power up.

The unit’s EPROM has a bad checksum. Return the unit to the
ADTRAN CAPs Department as instructed in the Product Support
page on the back page of this manual.

MAINTENANCE

The T1 CSU ACE requires no routine maintenance. No repairs should
be performed by the customer. Repair services can be obtained by re-
turning the unit to the ADTRAN Customer and Product Service
(CAPS) department as instructed on page 12.