Verilink AS56/56Plus (896-502588-001) Product Manual - Manual (Page 58)

Testing the Access System 56
4-4 AS56 and AS56 Plus User Manual
Local Loop with
BERT The CSU portion of a single Access Sys tem56 unit can be tested by
activating both the Local 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 not increment.
WHEN TESTING IS COMPLETED, BE SURE TO TURN BOTH THE
LOOP AND THE BERT “OFF”.
Payload BERT ON
Detector
Test Pattern
Generator
1.536 Mbps 1.544 Mbps
Payload Network
Interface
To
DTE
Local Loop and Detector
Test Pattern
Generator
1.536 Mbps 1.544 Mbps
Payload Network
Interface
Payload BERT
both ON
To
DTE