61204011L1-1
DSU IV ESP User Manual
13-1
Chapter 13
Testing and Troubleshooting
TEST OVERVIEW
The DSU IV ESP performs a variety of diagnostic functions that
isolate portions of the circuit to identify the problem source. Tests
may be initiated and terminated through the front panel, VT 100
terminal, SNMP, or Telnet. In asynchronous mode, AT commands
can control the testing from the DTE interface. For synchronous
operation, V.25 bis commands can provide test control.
The unit also responds to standard DDS network tests initiated
from telco test centers. In addition, it can run several tests such as
local and remote loopbacks to aid in problem isolation. See Figure
13-1.
Figure 13-1. Normal Operation Before Initiating Loopback Test
All diagnostic tests disrupt data flow.
LOCAL
DSU/CSU
REMOTE
DSU/CSU
DTE
DTE
RD
TD
TELCO
Rx
Tx
Rx
Tx
RD
TD
Rx
Tx
Rx
Tx
Содержание DSU IV ESP
Страница 54: ...Chapter 4 Applications 4 8 DSU IV ESP User Manual 61204011L1 1...
Страница 80: ...Chapter 8 Configuring Test Options 8 4 DSU IV ESP User Manual 61204011L1 1...
Страница 92: ...Chapter 9 Configuring Dial Options 9 12 DSU IV ESP User Manual 61204011L1 1...
Страница 104: ...Chapter 11 Configuring Unit Utilities 11 6 DSU IV ESP User Manual 61204011L1 1...
Страница 108: ...Chapter 12 Activating Dial Functions 12 4 DSU IV User Manual 61204011L1 1...
Страница 134: ...Chapter 14 Viewing Status Information 14 6 DSU IV ESP User Manual 61204011L1 1...
Страница 140: ...Appendix A Pinouts A 6 DSU IV ESP User Manual 61204011L1 1...
Страница 152: ...Appendix B AT Commands B 12 DSU IV ESP User Manual 61204011L1 1...
Страница 168: ...Appendix D Configuration Profiles D 4 DSU IV ESP User Manual 61204011L1 1...
Страница 172: ...Appendix E DSU to DSU Tail Circuit E 4 DSU IV ESP User Manual 61204011L1 1...
Страница 176: ...Appendix F Specifications Summary F 4 DSU IV ESP User Manual 61204011L1 1...
Страница 190: ...Appendix H Glossary H 10 DSU IV ESP User Manual 61204011L1 1...
Страница 194: ...Index Index 4 DSU IV ESP User Manual 61204011L1 1...