Comtech EF Data Vipersat SLM-5650A Guía de usuario Pagina 294
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Entry Channel Mode (ECM)
G-2 VMS User Guide
After all remotes are processed into ECM, the Burst Controller drops into sanity
mode sending a keep alive map to service remotes which may have their SCPC
carrier inhibit flag set. The keep alive message is sent once every two seconds
until re-entry is invoked.
Fail Safe Operation
For a detailed description of the features of VMS applications switching, refer
to Appendix F, "Automatic Switching". As application switching relates to the
ECM mode, it is useful to describe the fail-safe mechanism used for freeing
pool bandwidth.
If the VMS loses communications with a switched remote for more than three
minutes, it will attempt to return the remote to home state. If the revert-to-home
state command succeeds (restoring communications) Entry Channel Mode will
cause the remote to switch to its initial SCPC bit rate.
If the revert-to-home state command fails, the VMS will send a command to
return the remote and the hub demodulator to the state where they were prior to
losing communications, but leave the remote enabled in the STDMA burst
controller. This provides the remote with 2 paths to rejoin the network:
1. If the outage was the result of power outage at the site, the remote CDM-570/
570L or SLM-5650A will reboot in its home state (STDMA), acknowledge
the receipt of the first burst map causing it to rejoin the network through
ECM. The VMS will park the demodulator previously in use and free the
bandwidth slot.
2. If the outage was due to an extended rain fade or other communications
blockage with no loss of power, the remote will rejoin the network via the
previously assigned SCPC channel. When VMS receives a PLDM it will
send a revert-to-home state command and free the bandwidth slot and burst
demodulator. The remote will then rejoin the network through ECM.
Since it is not possible to know which of the above scenarios caused the
communications outage the VMS will not free the bandwidth slot except
through operator intervention.
Figure G-1 and figure G-2 diagram the time state differences and the process of
recovery. Note that the times referenced in the diagrams are approximate.
- USER GUIDE 1
- User Guide 3
- Document Revision History 5
- Table of Contents 7
- ToC iii 9
- VMS User Guide 10
- List of Figures 11
- Chapter 4 Figures 12
- Chapter 5 Figures 12
- Chapter 6 Figures 13
- Appendix A Figures 13
- Appendix B Figures 13
- Appendix C Figures 13
- Appendix D Figures 14
- Appendix E Figures 15
- Appendix F Figures 15
- Appendix G Figures 15
- Appendix H Figures 15
- List of Tables 17
- How to Use This Manual 19
- Conventions and References 21
- Product Description 23
- Figure 1-1 24
- VMS Features 25
- VMS Operation 25
- VMS Architecture 25
- New in this Release 27
- Chapter 1 - General 1-11 29
- Customer Support 30
- VMS INSTALLATION 31
- Figure 2-1 32
- Types of Installation 33
- Figure 2-2 35
- Figure 2-3 35
- Figure 2-4 36
- Figure 2-5 37
- 2-8 VMS User Guide 38
- Figure 2-6 39
- Figure 2-7 39
- Figure 2-8 40
- Figure 2-9 41
- Figure 2-10 42
- Figure 2-11 43
- Figure 2-12 44
- Figure 2-13 45
- Figure 2-14 46
- Figure 2-15 46
- Figure 2-16 47
- Figure 2-17 48
- Figure 2-18 48
- Figure 2-19 49
- Figure 2-20 50
- Figure 2-21 50
- Figure 2-22 51
- Figure 2-23 51
- Figure 2-24 52
- Figure 2-25 53
- Figure 2-26 53
- Figure 2-27 54
- Figure 2-28 54
- Figure 2-29 55
- Figure 2-30 55
- Figure 2-31 56
- Figure 2-32 57
- Figure 2-33 58
- Figure 2-34 58
- 2 - VMS Installation 2-29 59
- VMS Client Installation 60
- Figure 2-35 61
- Figure 2-36 62
- Figure 2-37 62
- Figure 2-38 63
- Figure 2-39 63
- Figure 2-40 64
- Figure 2-41 64
- Figure 2-42 65
- Figure 2-43 65
- Figure 2-44 66
- Figure 2-45 67
- Figure 2-46 67
- Figure 2-47 68
- Figure 2-48 68
- Figure 2-49 69
- Figure 2-50 70
- Installation Procedure 71
- Figure 2-51 72
- VMS CONFIGURATION 73
- Figure 3-1 74
- Figure 3-2 75
- Figure 3-3 78
- Figure 3-4 78
- Figure 3-5 78
- Figure 3-6 79
- Figure 3-7 80
- Figure 3-8 81
- Figure 3-9 83
- Figure 3-10 85
- Figure 3-11 86
- Figure 3-12 87
- Figure 3-13 87
- Figure 3-14 88
- Figure 3-15 88
- Figure 3-16 89
- Figure 3-17 90
- Figure 3-18 91
- Figure 3-19 91
- Figure 3-20 92
- Figure 3-21 93
- Figure 3-22 94
- Figure 3-23 94
- Figure 3-24 95
- Figure 3-25 95
- Figure 3-26 96
- Figure 3-27 96
- Figure 3-28 97
- Figure 3-29 98
- Figure 3-30 99
- Figure 3-31 99
- Figure 3-32 100
- Figure 3-33 101
- Figure 3-34 101
- Figure 3-35 102
- Figure 3-36 102
- Figure 3-39 103
- Figure 3-37 103
- Figure 3-38 103
- Figure 3-40 104
- Figure 3-41 105
- Figure 3-42 106
- Figure 3-43 106
- Figure 3-44 107
- Figure 3-45 108
- Figure 3-46 109
- Figure 3-47 110
- Figure 3-48 111
- Figure 3-49 112
- Figure 3-50 113
- Figure 3-51 113
- Figure 3-52 114
- Figure 3-53 115
- N:M Device Redundancy 116
- VMS Redundancy 116
- SOTM (Satellite On The Move) 116
- Figure 3-54 117
- Figure 3-55 118
- Figure 3-56 118
- VMS Network Configuration 119
- Figure 3-57 120
- Figure 3-58 121
- CONFIGURING NETWORK MODEMS 123
- Figure 4-1 124
- Hardware Configuration 125
- Configuring a Network Modem 126
- VMS SERVICES 127
- Figure 5-1 128
- Figure 5-2 129
- Figure 5-3 129
- Figure 5-4 130
- Figure 5-5 130
- Figure 5-6 131
- Figure 5-7 131
- Figure 5-8 132
- Figure 5-9 133
- Figure 5-10 134
- Figure 5-11 134
- Figure 5-12 135
- Figure 5-13 136
- Figure 5-14 136
- Figure 5-15 137
- Figure 5-16 138
- Figure 5-17 139
- Figure 5-18 140
- Figure 5-19 140
- TDM/ Burst Cont. X X X 141
- Hub Expansion X X X 141
- Remote Expansion X X X 141
- Figure 5-20 142
- Figure 5-21 143
- Figure 5-22 144
- Figure 5-23 145
- Figure 5-24 145
- Policy Tab 146
- Figure 5-25 147
- Figure 5-26 148
- Figure 5-27 148
- Figure 5-28 149
- Figure 5-29 149
- Figure 5-30 150
- Figure 5-31 150
- Figure 5-32 151
- Figure 5-33 151
- Figure 5-34 151
- Figure 5-35 152
- VMS Service Managers 153
- Figure 5-38 154
- Figure 5-39 155
- Figure 5-40 155
- Figure 5-41 156
- Figure 5-42 156
- Figure 5-43 156
- Figure 5-44 157
- Figure 5-45 157
- Figure 5-46 158
- Figure 5-47 159
- Figure 5-48 160
- Figure 5-49 160
- Figure 5-50 161
- Figure 5-51 161
- Figure 5-52 162
- Figure 5-53 163
- Figure 5-54 164
- Figure 5-55 164
- Figure 5-56 165
- Figure 5-57 165
- Figure 5-58 166
- ViperView 167
- OUT-OF-BAND UNITS 169
- Figure 6-1 170
- Figure 6-2 171
- Figure 6-3 171
- Figure 6-4 172
- Figure 6-5 172
- Figure 6-6 173
- Figure 6-7 174
- Figure 6-8 175
- Figure 6-9 176
- Figure 6-10 176
- Figure 6-11 177
- Figure 6-12 178
- Figure 6-13 179
- Figure 6-14 179
- Figure 6-15 180
- Figure 6-16 180
- Figure 6-17 181
- Figure 6-18 181
- Vipersat Circuit Scheduler 182
- VMS CROSS BANDING 183
- Figure A-1 184
- Figure A-2 185
- Figure A-3 186
- Figure A-4 187
- Figure A-5 188
- Figure A-6 188
- ANTENNA VISIBILITY 189
- Figure B-1 190
- Figure B-2 191
- Figure B-3 191
- Figure B-4 192
- Figure B-5 192
- Figure B-6 193
- Figure B-7 193
- Figure B-8 194
- Figure B-9 194
- Figure B-10 195
- Using Antenna Visibility 196
- REDUNDANCY 197
- Figure C-1 198
- Active VMS Server 198
- Standby #1 VMS Server 198
- Standby #2 VMS Server 198
- Standby #N VMS Server 198
- Protection Switch-over 199
- Server Synchronization 200
- Server Contention 201
- Figure C-2 202
- Figure C-3 203
- Figure C-4 204
- C - Redundancy C-9 205
- Figure C-5 206
- Figure C-6 207
- Figure C-7 207
- Manual Switching 208
- Clearing Server Contention 208
- N:M Hub Modem Redundancy 209
- Installing N:M Redundancy 211
- Figure C-9 213
- Figure C-11 215
- Figure C-12 215
- Figure C-13 216
- Figure C-14 216
- Figure C-15 217
- Figure C-16 217
- Figure C-17 218
- Figure C-18 218
- Figure C-19 219
- Figure C-20 219
- Figure C-21 220
- Figure C-22 220
- Figure C-23 221
- Figure C-24 221
- Figure C-25 222
- Figure C-26 223
- Figure C-27 224
- Figure C-28 224
- Figure C-29 225
- Figure C-30 226
- Figure C-31 226
- Figure C-32 227
- How N:M Redundancy Works 228
- C-34 VMS User Guide 230
- Figure C-33 231
- Figure C-34 231
- Figure C-35 232
- Figure C-36 232
- Figure C-37 233
- Figure C-38 233
- Figure C-39 234
- Figure C-40 234
- DOMAIN CONTROLLER AND DNS 235
- Figure D-1 238
- Figure D-2 239
- Figure D-3 239
- Figure D-4 240
- Figure D-5 240
- Figure D-6 241
- Figure D-7 241
- Figure D-8 242
- Figure D-9 242
- Figure D-10 243
- Figure D-11 243
- Figure D-12 244
- Figure D-13 244
- Figure D-14 245
- Figure D-15 246
- Figure D-16 246
- Figure D-17 247
- Figure D-18 247
- Figure D-19 248
- Figure D-20 248
- Figure D-21 250
- Figure D-22 251
- Figure D-23 251
- Figure D-24 252
- Figure D-25 252
- Figure D-26 253
- Figure D-27 253
- Figure D-28 254
- Figure D-29 254
- Figure D-30 255
- Figure D-31 255
- Figure D-32 256
- Figure D-33 256
- Figure D-34 257
- Figure D-35 257
- Figure D-36 258
- Figure D-37 258
- Figure D-38 259
- Figure D-39 259
- Figure D-40 259
- Figure D-41 260
- Figure D-42 261
- Figure D-43 262
- Figure D-44 263
- Figure D-45 263
- Figure D-46 264
- Figure D-47 264
- Figure D-48 265
- Figure D-49 265
- Figure D-50 266
- Figure D-51 266
- Figure D-52 267
- Figure D-53 267
- Figure D-54 268
- Figure D-55 268
- Figure D-56 269
- SNMP TRAPS 271
- Using SNMP Traps 272
- SNMP Traps Available in VMS 272
- Figure E-1 273
- Figure E-2 273
- Figure E-3 274
- Figure E-4 274
- Appendix E - SNMP Traps E-5 275
- Configuring SNMP Traps 275
- AUTOMATIC SWITCHING 277
- Load switching 278
- Controller: 279
- Figure F-1 281
- Figure F-2 282
- Load Switching Process 283
- Load Switching by a Remote 283
- Figure F-3 284
- Figure F-4 284
- Determining Need-for-Change 285
- Figure F-5 286
- Load Switch Example 287
- Figure F-6 289
- Application switching 290
- ENTRY CHANNEL MODE SWITCHING 293
- Fail Safe Operation 294
- Figure G-1 295
- Figure G-2 296
- Figure G-3 297
- Figure G-4 297
- Figure G-5 298
- Figure G-6 298
- Entry Channel Mode (ECM) 299
- ILLING LOG TRANSLATOR (VBLT) 301
- Examples 302
- GUI Mode 303
- Figure H-1 304
- Figure H-2 305
- Figure H-3 306
- Figure H-4 306
- 3.3 Scheduled Task Mode 307
- Billing Log Format 308
- GLOSSARY 309
- Appendix I - Glossary I-3 311
- Appendix I - Glossary I-5 313
- Appendix I - Glossary I-7 315
- Appendix I - Glossary I-9 317
- VMS User Guide Index-1 319
- Index-2 VMS User Guide 320
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