Black Box 32144 Manual page 51

MODEM 32144
6.5 Message Format ..............................................................................136
6.5.1 Asynchronous........................................................................136
6.5.2 Synchronous, Character-Oriented ......................................136
6.5.3 Synchronous, Bit-Oriented ..................................................137
7. Diagnostics...............................................................................................138
7.1 When and Why to Test ...................................................................138
7.2 Symptoms and Scope of the Problem...........................................138
7.3 Physical Inspection.........................................................................139
7.4 Overview of Modem Diagnostics...................................................139
7.5 How to Select and Activate Tests ...................................................140
7.5.1 Front-Panel Control .............................................................140
7.5.2 Running Tests in Hayes Mode .............................................140
7.5.3 Remote Test Control ............................................................140
7.6 Diagnostic Monitoring: Status Screens ........................................140
7.6.1 EIA Status Screen .................................................................140
7.6.2 Other Status Screens ............................................................141
7.7 Rate Change Screen.......................................................................143
7.8 Local Modem Diagnostics .............................................................144
7.8.1 Analog Loopback (ALB) Test..............................................144
7.8.2 Analog Loopback Self-Test (ALBST) ..................................145
7.8.3 Analog Loopback Self-Test with Errors (ST/E) .................147
7.8.4 External Analog Loopback (ALBX) Test............................147
7.8.5 External Analog Loopback Self-Test (ALXST) ..................149
7.8.6 Digital Loopback Test (DLB) ..............................................151
7.9 Remote Modem Diagnostics..........................................................153
7.9.1 Remote Digital Loopback (RDL) Test ................................153
7.9.2 Remote Digital Loopback Self-Test (RDLST) ....................154
Appendix A: Quick Setup Configurations ................................................156
Appendix B: Summary Setup .....................................................................166
B.1 Summary Setup LCD Screens .......................................................166
B.2 Changing Options via Summary Setup ........................................167
B.2.1 Summary Setup Pushbutton Functions..............................167
B.2.2 Explanation of Summary Setup Screens ............................168
Appendix C: Connectors, Adapters, and Jumpers ...................................176
C.1 Connectors and Adapters .............................................................177
C.1.1 Connector Pin Assignments................................................178
C.2 Jumpers...........................................................................................179
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