Cisco 3410DVB Manuale Utente Pagina 130
- Pagina / 139
- Indice
- SEGNALIBRI
- Programmable 1
- Solutions 1
- • Technology overview 2
- • Digital modem technologies 2
- • Conclusions 2
- So What is Broadband Access? 3
- Digital Modem Growth Drivers 4
- Frustrated Maybe … 6
- Source: Dataquest CAGR 39.2% 7
- • Potential to leverage voice 8
- Satellite Modem Overview 10
- Data Broadcasting 11
- System Block Diagram 12
- • Decoder 13
- Broadcom Corporation 14
- Host Interfaces 15
- Satellite Modem Design 16
- Spartan-XL 17
- Spartan-III 17
- Spartan-II 17
- Spartan-II Device Functions 19
- ISDN Overview 22
- Understanding ISDN Equipment 23
- • Widely available 24
- The Original Digital Service 25
- Two Major Variants 26
- ISDN Model 27
- Functional Groupings 28
- Reference Points 29
- U Reference Point 30
- S/T Interface 31
- Proprietary TDM interfaces 32
- ISDN In the Real World 33
- External ISDN Modem 34
- Internal ISDN Modem 35
- Always On ISDN 36
- • Developed by Ascend 37
- • Uses ISDN transport 37
- ASSP Providers 38
- • Design objectives 39
- ISDN PCMCIA Modem 40
- ISDN PCMCIA FPGA 41
- Spartan Functionality 43
- Without Xilinx 44
- With Xilinx 44
- ISDN Summary 45
- Cable Modems 46
- Cable Modem Overview 47
- • Offered by cable companies 48
- Cable Modem - Market Drivers 51
- • Concerns over data security 54
- What is a Cable Modem? 55
- How Do Cable Modems Work? 56
- Set-Top Box 57
- Cable M odem 57
- DOCSIS Cable Modem 58
- Inside a Cable Modem 60
- QAM & QPSK 65
- Downstream Data Channel in 66
- Cable Modem Physical Layer 66
- Upstream Data Channel in 68
- Many Different 70
- • Always-on connection 71
- DSL Overview 73
- ADSL Equipment 74
- DSL Market Trends 75
- DSL Technologies 77
- I/O Routing Ring 79
- Spartan-II Clock Management 80
- Distributed RAM 81
- Block RAM 81
- External Memory 81
- Spartan-II Block RAM 82
- Spartan-II IP Solutions for 87
- HDLC Controllers 87
- Memec Design Services 89
- CoreEL MicroSystems 90
- The Spartan-II Competitive 92
- Advantage: 100k Unit Cost 93
- Solution <$6 94
- Programmable ASSP - Value 95
- Conclusions on Digital Modems 96
- The Digital Modem 97
- Evolves Into The 97
- Residential 97
- Gateways 97
- New Dimensions to Home 98
- Internet Access 98
- Convergence Is Happening! 99
- The Push for Home Networking 100
- • Television 101
- Worldwide Home Network & 102
- Residential Gateway Forecast 102
- Residential Gateway 103
- Solutions Available 105
- Market Requirements and 105
- Access & Home Networking 106
- Television 106
- Broadband Based or 107
- Digital Modems RGs 107
- Broadband Centric or 108
- Home Networking is Here! 110
- First Generation RGs 111
- Second Generation RGs 112
- Third Generation 114
- HiperLAN2) 116
- – Distribution of broadband 117
- – Seamless connection & 117
- – Management software for 117
- Satellite Modems 118
- ISDN Modems 119
- Interface 120
- ADSL Broadcast Solution 121
- DSL Modem Home Gateway 122
- V.90/56K Modems - Analog 125
- Phonelines 125
- Broadband Access in Hotel 125
- – Provides error correction 127
- – Provides data compression 127
- Analog Modems 128
- Satellite Modem Block Diagram 133
- ISDN CPE - Block Diagram 134
- Cable Modem - Block Diagram 135
- Channels 136
- $9.95$9.95 137
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