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Table of Contents
xiv DSU 56/64 User Manual 61200062L1-1
Carrier Detect (CD) - SE 4 ....................................................................................2-3
Down - Normal ..............................................................................................2-3
Up - On ............................................................................................................2-3
Data Set Ready (SR) - SW 5 ..................................................................................2-3
Down - On .......................................................................................................2-3
Up - Normal ....................................................................................................2-3
Remote Digital Loopback (RDL) - SW 6 ............................................................2-4
Down - Enable ................................................................................................2-4
Up - Disable ....................................................................................................2-4
Loop Rate - SW 7 ...................................................................................................2-4
Down - 56 Kbps ..............................................................................................2-4
Up - 64 kbps ....................................................................................................2-4
Scrambler - SW 8 ................................................................................................... 2-4
Down - On .......................................................................................................2-4
Up - Off ............................................................................................................2-4
Network Connections .........................................................................................................2-5
DTE Connections ................................................................................................................. 2-5
Chapter 3. Test Modes
Self Test .................................................................................................................................3-1
Near End Tests .....................................................................................................................3-2
DTE Only Test ......................................................................................................................3-2
DTE with Test Pattern (TP) ................................................................................................3-3
DTE and Loop Test (LL) .....................................................................................................3-4
Loop Only Test (RT) ............................................................................................................3-6
Far End Tests ........................................................................................................................3-7
Remote Digital...............................................................................................................3-7
RDL with Test Pattern (TP)..........................................................................................3-7
Test Pattern (PTRN)......................................................................................................3-8
Remote Tests ........................................................................................................................3-9
Appendix A. Pinouts........................................................................................................ A-1
Appendix B. Specifications ............................................................................................ B-1
Index ............................................................................................................................Index-1