Verilink AS100 (896-502379-001) Product Manual - Manual (Page 57)

Access System Centum Series User Manual 4-5
CSU Loop with BERT
The CSU portion of a single Centum Series unit can be tested by
activating both the CSU Loop and the Payload BERT. Refer to page 4-2
and page 4-3.
If the CSU portion of the unit is functioning properly, the Seconds/Test
will increment while the Errored Seconds will remain at
∅∅∅∅∅
.
WHEN TESTING IS COMPLETED, BE SURE TO TURN BOTH THE
LOOP AND THE BERT TESTS “OFF”.
Figure 4-2 CSU Loop with BERT
CSU Loop and
Detector
Test Pattern
Generator
1.536 Mbps 1.544 Mbps
Payload Network
Interface
Payload BERT
both ON