Digital Data Communications LEVEL ONE FCS-4500 Manual do Utilizador Página 102
- Página / 139
- Índice
- MARCADORES
- 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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