ADTRAN DSU III AR User Manual page 16

Table of Contents
Chapter 11. Testing and Troubleshooting
TEST OVERVIEW .............................................................................................................. 11-1
Initiating a Test ............................................................................................................ 11-2
Test Status Display...................................................................................................... 11-3
Exiting a Test................................................................................................................ 11-3
Troubleshooting ................................................................................................................. 11-5
Messages from the DSU/CSU................................................................................... 11-5
Troubleshooting New Installs ................................................................................... 11-6
Test Sequence for Troubleshooting New Installs or Existing Circuits ........ 11-8
Local Unit diagnostics .................................................................................................... 11-10
DTE and Loop (LL) ................................................................................................... 11-12
Test Description ................................................................................................. 11-12
Test Purpose ....................................................................................................... 11-12
Initiating ............................................................................................................. 11-13
Interpreting Test Results .................................................................................. 11-13
Loop Only (RT).......................................................................................................... 11-14
Test Purpose ....................................................................................................... 11-14
Initiating ............................................................................................................. 11-15
Interpreting Test Results .................................................................................. 11-15
DTE Only.................................................................................................................... 11-16
Test Purpose ....................................................................................................... 11-16
Initiating ............................................................................................................. 11-17
Interpreting Test Results .................................................................................. 11-17
DTE With Test Pattern.............................................................................................. 11-18
Test Purpose ....................................................................................................... 11-18
Initiating ............................................................................................................. 11-19
Interpreting Test Results .................................................................................. 11-19
Test Pattern ................................................................................................................ 11-20
Test Purpose ....................................................................................................... 11-20
Initiating ............................................................................................................. 11-21
Interpreting Test Results .................................................................................. 11-21
Self Test....................................................................................................................... 11-22
Test Purpose ....................................................................................................... 11-22
Initiating ............................................................................................................. 11-22
Interpreting Test Results .................................................................................. 11-22
Remote Unit Diagnostics ................................................................................................ 11-23
Test Purpose ....................................................................................................... 11-24
Initiating ............................................................................................................. 11-24
Test Results ........................................................................................................ 11-24
Interpreting Test Results .................................................................................. 11-25
xvi DSU III AR User Manual 61202011L1-1