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manuais Digital Data Communications LEVEL ONE FCS-4500

Manuais de instruções e guias do utilizador para Câmaras de segurança Digital Data Communications LEVEL ONE FCS-4500.
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Digital data communications LEVEL ONE FCS-4500 Manual do Utilizador (139 páginas)


Marca: Digital-data-communications | Categoria: Câmaras de segurança | Tamanho: 1.44 MB |

 

Índice

Digital Communication

1

Jamadagni H S DC/V1/2004 4

4

Analog Digital PCM TDM

5

Digital Analog Modems

5

Digital Digital ISDN, LANs

5

Signal sampling

6

Jamadagni H S DC/V1/2004 7

7

Jamadagni H S DC/V1/2004 8

8

Low pass

10

Quantisation errors

11

Quantisation error in PCM

12

Jamadagni H S DC/V1/2004 13

13

Mid-riser quantizer

14

Mid-tread quantizer

14

A/Amax (dB)

15

Non-linear AD conversion

16

Input sample values

16

Compression law - µ law

17

Compression law - A law

18

Jamadagni H S DC/V1/2004 19

19

Jamadagni H S DC/V1/2004 20

20

DPCM implementation

21

Delta modulation

22

Slope over load

23

Granular noise

23

Low Data Rate Modulation

24

Conceptual view of ISDN

25

ISDN principles

27

Principles of ISDN (Cont.)

28

ISDN evolution

29

Jamadagni H S DC/V1/2004 6

30

ISDN services: Attributes

31

ISDN service classification

32

Jamadagni H S DC/V1/2004 9

33

Functional grouping

35

Network functional principles

36

Access channel and rate

37

Bearer services

38

(a) Point-to-point

39

<1 km

39

Jamadagni H S DC/V1/2004 16

40

NT1 star

41

Jamadagni H S DC/V1/2004 18

42

Layer 1 functions

43

ISDN Layer 2

44

Jamadagni H S DC/V1/2004 24

48

Jamadagni H S DC/V1/2004 32

56

Jamadagni H S DC/V1/2004 33

57

Call clearing messages

58

Jamadagni H S DC/V1/2004 39

63

Communication Systems

72

History of Switching

73

SWITCHES

74

Switching system topology

75

Signals in Switching Systems

76

Tasks of a Switch

77

Call processing in a Switch

78

SLOT ALLOTTED #1

79

SLOT ALLOTTED TO #6

79

Switching System Operations

80

Analogue Switch Features

82

A generic N by N switch

83

Space division switch

84

Jamadagni H S DC/V1/2004 14

85

SWITCH CONTROL SYSTEM

86

Time slot interchange

87

PCM INPUT BUS

88

INFORMATION MEMORY

88

CONTROL MEMORY

88

TDM Bus switch

89

Time-space-time Switch

90

Space-time-space switch

91

Overview

92

• Voice Grade Modems

93

• Digital Subscriber Line

95

HDSL and SDSL

96

ADSL // RADSL

97

Bandwidth Requirements

98

Distance is from Central

99

Office or RT (repeater

99

• Asymmetric data streams

100

DSL basics (contd 1)

102

DSL basics (contd 2)

103

Existing

104

ADSL reach

106

Frequency Spectrum

109

Modulation Techniques (ADSL)

110

Competing Technologies

112

Jamadagni H S DC/V1/2004 1

114

Jamadagni H S DC/V1/2004 2

115

Jamadagni H S DC/V1/2004 3

116

Terminal Call

117

Processing

117

Exchange Call

117

Layer 3

118

Functions

118

Layer 2

119

Function of other layers

120

Protocol reference model I

121

Basic Call Control

122

Layer 1 Functions

123

Q931 message types

124

Messages

125

Jamadagni H S DC/V1/2004 10

126

Jamadagni H S DC/V1/2004 11

127

Call clearing

128

Frame format in ISDN layer 2

129

LAPD format

130

LAPD commands and responses

131

Unnumbered format

132

(a) SAPI Assignments

133

(b) TEI Assignments

133

TEI Value User Type

133

TEI and SAPI assignment

134

Bipolar-AMI

135

Physical connector in ISDN

136

The U interface

137

U interface circuit

138

Jamadagni H S DC/V1/2004 23

139




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