Zhone 3920Plus Manual de instrucciones Pagina 273
- Pagina / 354
- Tabla de contenidos
- SOLUCIÓN DE PROBLEMAS
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
Troubleshooting
B-53920-A2-GH30-40 October 1998
Table B-5
(2 of 2)
Modem — VF Connection
Symptom Action
Intermittent disconnects, high error
rates, or excessive retransmissions
occur.
Perform an End-to-End test. Refer to Pattern located in Chapter 8, Test Branch.
The modem establishes and then
disconnects the call.
You may have a poor VF connection. Try dialing again.
The remote modem may have encountered an error control (EC) disconnect. If
the modems cannot negotiate EC, then a disconnect occurs.
The remote modem may be in a forced Error Control mode (disconnect if there
is no error control). Reconfigure your modem to V.42/MNP or Buffer and try
again.
Check the LCD to determine the reason for the disconnect.
Perform a Local Analog Loopback test.
High error rates occur when running
a local loopback or self-test.
Incoming rings can cause data errors during a loopback test. Abort the test,
disconnect the modular VF cord, and restart the test.
Table B-6
Online Operation
Symptom
Action
The data is scrambled. Verify that the character format (data bits, parity, and stop bits) is set to the
same value in both modems.
Data is missing during a transfer. Verify that you are using the same method of flow control for both the modem
and the DTE.
If using XON/XOFF flow control, verify that the modem’s parity matches the
DTE’s parity.
Table B-7
Misc Operation
Symptom Action
Problems in collecting Health and
Status information from tributary
modems.
When a multipoint network contains tributary modems using different firmware
releases, you could encounter problems in the collection of Health and Status
information. If the above situation applies to your network, set the Mixed Trib
F/W configuration option to Yes.
- COMSPHERE 1
- MODELS 3920P 1
- AND 3921PLUS 1
- 392xPlus Modems 2
- Models 3920Plus and 3921Plus 2
- Important Safety Instructions 3
- Table of Contents 5
- Appendices 7
- List of Figures 8
- List of Tables 9
- COMSPHERE 392xPlus Modems 10
- How to Use This Manual 11
- Related Documents 12
- Introduction 13
- COMSPHERE 392xPlus Models 14
- Chapter Title 15
- 3921Plus 16
- DTE B DTE A 17
- 392xPlus Operational Modes 18
- 392xPlus Modem Features 19
- Applications 20
- V.34 Modulation 21
- Multiport Backup 22
- Synchronous Data Compression 22
- United States 22
- Technical Specifications 25
- Table 1-2 26
- Specifications Description 26
- Modem Installation 27
- Customer-Supplied Equipment 28
- Dial Network Connection 33
- Leased Backup Connection 33
- Dial Backup Connection 33
- 495-14425-02 38
- RELEASE TAB 38
- 392xPlus Modem Power-Up 39
- DCP Operation 41
- Status Indicators 42
- Table 3-1 44
- 392xPlus DCP LEDs 44
- Color Indicates 44
- LCD Display 46
- Hidden Choice Indicators 46
- Other Indicators 47
- Menu Structure 48
- Table 3-3 51
- Top-Level Menu Status 51
- Status IndicatesMessage 51
- Quick Configuration Display 54
- Status Branch 59
- Leased:33.6 60
- Status Configure 60
- Table 4-1 62
- Health and Status Messages 62
- Type IndicatesMessage 62
- Displaying VF Conditions 64
- Clearing VF Counters 65
- Identity 66
- Service Log 75
- Configuration Tables 84
- Multiport Mode l 84
- Multiport Mode 85
- Table 5-1 87
- (2 of 9) 87
- (3 of 9) 88
- (4 of 9) 89
- (5 of 9) 90
- (6 of 9) 91
- (7 of 9) 92
- (8 of 9) 93
- (9 of 9) 94
- Table 5-2 96
- Dial Line — Multiport Mode l 98
- Table 5-3 100
- (3 of 3) 100
- Configure Branch 101
- Table 5-4 102
- (2 of 5) 102
- (3 of 5) 103
- (4 of 5) 104
- (5 of 5) 105
- Test — Multiport l 106
- Misc — Multiport l 107
- Table 5-6 108
- (2 of 4) 108
- (3 of 4) 109
- (4 of 4) 110
- Singleport Mode A 111
- 98-14624-07 112
- Table 5-7 114
- (2 of 8) 114
- (3 of 8) 115
- (4 of 8) 116
- (5 of 8) 117
- (6 of 8) 118
- (7 of 8) 119
- (8 of 8) 120
- Table 5-8 122
- Table 5-9 126
- Dial Line — Singleport Mode A 129
- Table 5-10 130
- Table 5-11 134
- (2 of 7) 134
- (3 of 7) 135
- (4 of 7) 136
- (5 of 7) 137
- (6 of 7) 138
- (7 of 7) 139
- Table 5-12 141
- Test — Singleport Mode A 147
- Table 5-13 148
- (2 of 2) 148
- Misc — Singleport Mode A 149
- Table 5-14 150
- Security — Singleport Mode A 154
- Poll List Branch 155
- Control Branch 161
- Data Stream 163
- Selecting All Ports 164
- EIA LEDs 165
- Make Busy/Remove Make Busy 166
- Download Software 168
- Selecting Clone Remote 169
- Automatic Firmware Download 176
- VF Thresholds Update 177
- Table 7-1 180
- VF Thresholds 180
- Valid Ranges Default Values 180
- Test Branch 181
- Loc Analog Loop 184
- Rem Digital Loop 185
- Loc Digital Loop 187
- Sub-Network Health 191
- Call Setup Branch 193
- Call_Setup 194
- Disconnect 196
- Dial Standby/Return to Dial 197
- Change Directory 199
- Table 10-1 201
- Valid Dial Command Modifiers 201
- Talk/Data Branch 203
- Dial Access Security 207
- Originate Access Security 208
- Answer Access Security 208
- VF-Side Passwords 209
- DTE-Side Passwords 210
- Security Branch 211
- Set Access Ctrl 212
- Admin Password? 212
- EditPasswdTable 213
- Select Index 213
- Table 12-1 215
- Set Answer Sec 216
- Set Orig Sec 217
- Set Admin PsWd 218
- Reset Security 219
- Table 12-4 221
- (2 of 3) 221
- Originate Access Password 223
- Database Table Examples 224
- Remote Branch 229
- Overview 233
- Command and Data Modes 233
- Command Guidelines 234
- Result Codes 235
- AT Command List 237
- S-Register List 248
- Menu Tree 265
- Gain Hts 266
- 98-15921b 267
- Troubleshooting 269
- Table B-4 271
- Modem — DTE Connection 271
- Symptom Action 271
- Table B-5 272
- (1 of 2) 272
- Modem — VF Connection 272
- Table B-8 274
- MUX Operation 274
- Pin Assignments 275
- EIA-232-D Pin Assignments 276
- VF Connector Pin Assignments 277
- Auxiliary Cables Not Supplied 278
- ITU-T V.25bis Dialing Command 281
- Call Request Commands 282
- Call Response 282
- Call Answer Commands 283
- Program Normal (PRN) 284
- Command Response 286
- ASCII Character Table 289
- Default Configuration Options 293
- Table F-1 294
- (1 of 10) 294
- (2 of 10) 295
- (3 of 10) 296
- (4 of 10) 297
- (5 of 10) 298
- (6 of 10) 299
- (7 of 10) 300
- (8 of 10) 301
- (9 of 10) 302
- (10 of 10) 303
- Sample Configurations 305
- Point-to-Point 306
- Sample Port Rate Table 307
- Extended Point-to-Point 308
- Extended Multipoint 310
- Configuration Options 311
- 28800(V34) 312
- Extended Diagnostics 318
- Digital Bridging 320
- Point-to-Point MSD 322
- Multipoint MSD 324
- DTE1, 2, 3, or 4 325
- Synchronous Data Format 328
- SDC Algorithm 328
- DTE and DCE Frames 329
- SDC User Interface 329
- Data Synchronization 330
- Flow Control Method 331
- Tuning SDC Efficiency 332
- SDC Negotiation 333
- Equipment List 335
- Glossary 337
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