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Appendix E - Glossary E-1
A
PPENDIX
GLOSSARY
A
ACK A signal used in computing and other fields to indicate acknowledgement, such
as a packet message used in TCP to acknowledge the receipt of a packet.
ACM Adaptive Coding and Modulation – A technique that optimizes throughput in a
wireless data link by adapting the forward error correction code rate and the
modulation order according to the noise conditions (or other impairments) on
the link. A feature that is supported in CEFD modems such as the CDM-840
Remote Router.
ARP Address Resolution Protocol – A protocol for a LAN device to determine the
MAC address of a locally connected device given its IP address. See also MAC.
ASR Automatic Switch Request – A switch request message generated by older
Vipersat modems (e.g., CDM-570/L) that is sent to the VMS to establish a new
satellite link or adjust bandwidth between source and destination IP addresses.
B
Base
Modem
The main component in a satellite communications modem that consistes of a
circuit board with the modem hardware and firmware and the associeated inter-
faces.
- CDD-56X Series 1
- User Guide 3
- COMTECH EF DATA 4
- Document Revision History 5
- Table of Contents 7
- Appendix A 8
- Appendix B 8
- Appendix C 9
- Appendix D 9
- Appendix E 9
- MN/22137, rev 1 10
- List of Figures 11
- List of Tables 13
- How to Use This Manual 15
- Conventions and References 16
- 1 - General 1-3 17
- Product Description 18
- Dynamic SCPC (dSCPC) 19
- Single Hop On Demand 20
- Turbo Product Coding 20
- Header Decompression 20
- New in This Release 21
- Customer Support 22
- QUICK START CONFIGURATION 23
- Initial Configuration 24
- Set the Feature Configuration 25
- Figure 2-1 26
- Figure 2-2 26
- Figure 2-3 27
- Figure 2-4 27
- Set the IP Address 28
- Configure the Route Table 29
- Figure 2-7 31
- Figure 2-8 32
- Figure 2-9 32
- Common Screen Commands 36
- Menu Descriptions 37
- Figure 3-2 38
- Figure 3-3 38
- Feature Configuration 39
- Vipersat Auto Switching 40
- Vipersat Management 40
- Vipersat STDMA 40
- Vipersat File Streamer 41
- Vipersat Configuration 42
- Configuration” on page 3-5 43
- STDMA Tx Rate 44
- Hub Type 44
- ECMv2 Mode 47
- Group ID 48
- STDMA Max Power Hunt 48
- Burstmap Multicast IP 49
- Outbound IP 50
- Cycles Per Burst Map 50
- Slot Guardband 51
- Slot Preamble Length 52
- Slot Data Length 52
- Nominal Data Length 53
- Maximum Data Length 53
- Minimum Data Length 54
- Total Slot Count 54
- Slot Cycle Length 55
- Slot Start in Cycle 55
- Set Remotes 55
- Figure 3-23 56
- Figure 3-24 56
- Figure 3-25 57
- Figure 3-26 58
- Figure 3-27 59
- Figure 3-28 59
- Figure 3-29 60
- Figure 3-30 60
- Figure 3-31 60
- Figure 3-32 61
- Figure 3-33 61
- Figure 3-34 61
- Figure 3-35 62
- Figure 3-36 62
- LNB LO Frequency 63
- STDMA Statistics 64
- Show Hub Statistics 65
- Auto Switching 67
- Current WAN Transmit Mode 68
- STDMA Slot Capacity 68
- STDMA Switch Delay 69
- Percent Allocation 69
- Hitless Switching Parameters 70
- Figure 3-48 71
- Unit Role 72
- Expansion Unit 73
- Network ID 73
- Unit Name 74
- Receive Multicast Address 74
- Managing IP Address 75
- Management Security 76
- Figure 3-56 77
- Figure 3-57 77
- Primary Heart Beat 78
- Home State Revert 78
- Figure 3-58 79
- Figure 3-59 79
- DPC Enabled 80
- Speed Up EbNo 80
- Target DPC Address 80
- Set Home State Parameters 81
- Force Modem to Home State 82
- STDMA State 83
- Receive Frequency 83
- Receive Data Rate 83
- Receive FEC Type 84
- Receive Coding Rate 84
- Vipersat Summary 85
- Vipersat Migration 86
- UDP Port Base Address 87
- NETWORK ADDRESSING 89
- The OSI Reference Model 90
- A - Network Addressing A-3 91
- Binary Math 92
- A - Network Addressing A-5 93
- IP Addressing 94
- Figure A-4 95
- Private Network IP Addresses 96
- Subnet Mask 97
- Network Segments 98
- Default Gateways 99
- MAC Addresses 99
- Figure A-10 100
- AUTOMATIC SWITCHING 101
- Hitless Switching 102
- MN/22137, rev 1 Gene ral 103
- Load Switching 104
- Burst Controller 105
- STDMA ACK Message 106
- Load Switching—STDMA Hub 108
- Hub Switching Process 109
- Load Switching—Remote 110
- Figure B-4 111
- Figure B-5 111
- Determination for Switching 112
- Load Switch Example 113
- Application Switching 116
- ToS Switching 118
- Configuration 120
- Example Implementations 121
- ToS Remarking 122
- ToS to DSCP Value Conversions 123
- Entry Channel Mode Switching 125
- Fail-Safe Operation 126
- Figure B-14 127
- Using STDMA ECM 128
- Figure B-16 129
- Figure B-17 130
- Figure B-18 130
- Dynamic Entry Channel Mode 131
- Hub Configuration 132
- Remote Configuration 133
- ECM Processing 134
- Figure B-22 135
- DYNAMIC POWER CONTROL 137
- Introduction MN/22137, rev 1 138
- STDMA mode 138
- from the BaseLine 139
- Theory of Operation 140
- MN/22137, rev 1 Descript ion 141
- Figure C-2 142
- DPC Parameters, Main Menu 144
- Main DPC Menu 145
- Enable DPC 146
- Target Eb/No 146
- Calculate Max Power Menu 147
- Figure C-5 148
- Figure C-6 148
- Max Power 150
- MODEM 151
- Power Considerations 152
- Cabling Considerations 152
- ECM MIGRATION 155
- Ge ner al MN/22137, rev 1 156
- Migration Procedure 157
- Figure D-1 158
- Configure Hub Unit 159
- Figure D-3 160
- Vipersat ECM Calculator 161
- GLOSSARY 163
- Appendix E - Glossary E-3 165
- Appendix E - Glossary E-5 167
- Appendix E - Glossary E-7 169
- Appendix E - Glossary E-9 171
- Appendix E - Glossary E-11 173
- Appendix E - Glossary E-13 175
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