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CHAPTER 12: Testing and Troubleshooting

Figure 12-12. DBU Connection Test.

Test Purpose

The purpose of this test is to verify the DBU circuit and DBU modules in both

the local and remote CSU/DSU MS DBU are functioning properly.

Initiating

Follow the menu path outlined in Figure 12-13 to initiate a DBU connection test.

Figure 12-13. Initiating a DBU Connection Test.

Interpreting Test Results

If the unit is functioning properly, the CSU/DSU MS DBU displays:

DBU TEST PATTERN

TST ERR = 0000

2=TEST

1=LOCAL UNIT

2=REMOTE UNIT

3=DBU CONNECTION

1=DIAL STORED #

2=ENTER DIAL #

3=REDIAL LAST #

1=98376113

2=EMPTY

3=EMPTY

4=EMPTY

5=EMPTY

6=EMPTY

7=EMPTY

8=EMPTY

9=EMPTY

A=EMPTY

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 115 116

CSU/DSU MS DBU 1
TRADEMARKS 2
INDUSTRY CANADA 3
NOM STATEMENT 4
ELECTRICAL SAFETY STATEMENT 4
INSTRUCCIONES DE SEGURIDAD 4
ABOUT THIS MANUAL 6
About This Manual 6
FCC REGULATIONS 8
Contents 12
CONTENTS 14
1. Introduction 16
1.2 DDS Operation 17
1.3 Switched 56 Operation 17
1.4 SNMP 17
CHAPTER 1: Introduction 18
1.5 TELNET 18
1.6 Dial-Backup Operation 18
1.7 Dial-Backup Modules 18
2. Installation 20
2.2 Rear Panel 21
CHAPTER 2: Installation 22
3. Operation 25
CHAPTER 3: Operation 26
4. Applications 31
CHAPTER 4: Applications 32
4.2 Dial-Backup Application 34
5. Configuration Overview 37
6.1 Loop Rate 44
6.2 Network Address 44
6.3 Remote Configuration 45
6.4 Network Type 45
6.5 Clock Source 45
7. Configuring DTE Options 46
Front Panel AT Description 48
7.1 DTE Rate 49
7.2 Connector Type 49
7.3 Data Format 49
7.4 DTE Command Option 50
7.5 Transmit Clock 50
7.7 Anti-Stream 51
7.8 CD Options 51
Always” is Enabled 54
9.1 Phone Numbers 56
9.2 SW56 Auto Answer 56
9.3 DBU Options 57
PTIONS FOR 60
10. Configuring Management 64
Functions 64
10.3 IP Options 65
10.4 SNMP Options 66
10.5 TELNET Options 67
11.1 Manual Command 70
11.2 Time/Date 71
11.3 Software Revision 72
11.4 LAN MAC Address 72
11.5 Serial Number 72
12.1 Test Overview 73
Press 1 to clear errors 74
Press 2 to inject an error 74
Use the Up and Down arrows 74
12.2 Troubleshooting 75
12.3 Local Unit Diagnostics 78
Figure 12-6. Loop Only Test 80
12.4 Remote Unit Diagnostics 83
Local Unit Initiates Test 84
12.5 DBU Connection 85
13. Activating Dial Functions 87
Dial-Backup Information 89
TATUS OF 90
EADS AND 92
Appendix A. Pinouts 93
APPENDIX A: Pinouts 94
Appendix B. AT Commands 97
APPENDIX B: AT Commands 98
Appendix C. Terminal Menu 99
Structure 99
C.1 Status Menus 103
DSU CONFIGURATON 104
Figure C-10. Utility Menu 106
C.3 Local/Remote Test Menus 107
C.4 Dial SW56/Dial DBU 107
Figure C-14. Dial DBU Menu 108
Appendix E. DSU-to-Modem 112
Interconnect 112
Appendix F. Specifications 113
APPENDIX F: Specifications 114
SNMP and TELNET 114
Clocking 114
Switched Mode Dialing Options 114
Diagnostics 114

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