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COMSPHERE 392xPlus Modems
1-2 October 1998 3920-A2-GH30-40
COMSPHERE 392xPlus Models
The COMSPHERE 392xPlus modem is available in the following models:
• Model 3920Plus standalone singleport modem (model no. 3920-A1-xxx and 3920-A2-xxx).
• Model 3920Plus standalone multiport modem (model no. 3920-A1-40x).
• Model 3921Plus carrier-mounted singleport modem (model no. 3921-B1-01x).
• Model 3921Plus carrier-mounted multiport modem (model no. 3921-B1-00x).
A reference to 392xPlus modems refers to all 3920Plus and 3921Plus models.
Model 3920Plus Standalone Singleport Modems
The Model 3920Plus singleport (Figures 1-1 and 1-2) is a standalone modem capable of either
4-wire/2-wire leased-line or dial operation. This modem is controlled using either AT commands
or the DCP. The DCP consists of a liquid crystal display (LCD), three function keys, four
directional keys, and a row of 13 LED status indicators. For a better understanding of DCP
operation, refer to Chapter 3, DCP Operation.
DIAGNOSTIC
CONTROL
PANEL
LCD AND
KEYPAD
STATUS
INDICATORS
POWER
SUPPLY
97-14678-02
POWER
ON/OFF
LEASED
DIAL
DTE 1
NMS
POWER IN
Figure 1-1. 3920-A2 Standalone Modem
- 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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