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Grabadores de vídeo digital (dvr)
3410DVB
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Cisco 3410DVB Manual de usuario Pagina 90
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CoreE
L M
i
croSys
tem
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CC
318f
HD
LC Cont
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ll
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(T
ra
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s
m
i
t
t
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k
D
iag
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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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