Interpreting Test Results - ADTRAN DSU IV ESP User Manual

Chapter 13. Testing and Troubleshooting

Interpreting Test Results

If the unit is functioning properly, the DSU IV ESP displays:
DTE WITH TP
TST ERR=XX
The first line of the display indicates the type of test being
performed, while the second line of the display indicates the
number of errors accumulated by the test pattern detector.
If errors occur during this test, press 1 to reset the test error count to
zero.
To verify proper operation of this test, single bit errors can be
injected into the transmitted test pattern by pressing 2. These errors
appear on the T
13-14
display.
E
EST RR
DSU IV ESP User Manual 61204011L1-1