Verilink AS2000: The Basics (880-502981-001) Product Manual Manual do Utilizador Página 134
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Acronyms and Definitions
Glossary-14 Verilink Access System 2000: Basics
data terminal equipment (DTE) Data communication equipment
(computers, digital PBX, terminals,
and video equipment) that connect
to
data circuit- terminating
equipment (DCE)
. DTE can
generate and receive data carried
by the network.
DC Direct Current. An electric current
in which electrons flow in one
direction only.
DCE See
data circuit- terminating
equipment (DCE)
.
decibel (dB) A measure of the relative strength
of two signals. The number of
decibels is ten times the log ratio
of the power of two signals or 20
times the log ratio of the voltage
of two signals.
degraded minute (DM) A predetermined time segment
during which a predetermined
number of errors has occurred.
There is no loss of communication,
but throughput can be
compromised.
DIDCSU Dual Integrated
Data Service Unit
(DSU)
and
Channel Service Unit
(CSU)
an AS2000 application
module.
Digital Data Service (DDS) A digital communications line
carrying data at 64 kbit/s or less.
digital multiplexer/ demultiplexer A digital multiplexer takes several
lower speed digital lines (channels)
and combines them into one faster
digital line (channel). A digital
demultiplexer device takes a
digital line and divides it into
several channels.
Digital Signal Level 0 DS0. A 56K or 64K timeslot which
forms 1/24 of a T1 or 1/32 of an
E1 signal (known as E0).
Digital Signal Level 1 DS1. The 1.544 Mbit/s digital
signal carried on a T1. There are
24 DS0s in a T1 line. Each DS0 can
transmit 64 kbit/s or 56 kbit/s
signals.
- Verilink Access System 2000 1
- The Basics 1
- Copyright Notice 2
- Trademarks 2
- FCC Requirements 2
- Lithium Battery 2
- Canadian 3
- Requirements 3
- Safety Precautions 3
- Product Warranty 4
- Customer Service 4
- Publications Staff 4
- Table of Contents 5
- About this Manual 10
- Access System 2000 Overview 11
- AS2000 System 12
- AS2000 Design 13
- AS2000 Management Options 14
- Node Manager 15
- Management 15
- Support Cross 15
- Reference 15
- Performance Monitoring 16
- System Information 17
- Quint-line Shelf 18
- ACP Data Bus 19
- Structure 19
- ACP Controller 20
- Bus Structure 20
- Types of Modules 21
- Data Service Unit 22
- (DSU) Modules 22
- System Node 1 23
- System Node 2 23
- AS2000 Modules 24
- ACP-Based 25
- Application 25
- Timing Source 26
- DCE to DTE Timing 27
- Crossover 28
- Connection 28
- TABS-Based 29
- Timing Options 29
- Shelf Sync Master 30
- Site Planning 31
- System Cabling 32
- Considerations 32
- System Power 33
- Hardware 34
- Dimensions 34
- Heat Dissipation 35
- Preparation Guidelines 37
- Configuration Worksheets 38
- Shelf Planning 39
- Worksheets for 39
- TABs Modules 39
- ACP Modules 41
- Hardware Installation 47
- Shelf Mounting 48
- Fuse Panel 50
- AC Power Connections 51
- DC Power Connections 52
- Connect the 54
- Power Supply 54
- Fan Shelves 55
- DC Power Fan 56
- Shelf Connections 56
- Fan Alarm 57
- Installing the 58
- TIU Installation 59
- Application and 60
- Verification 60
- Supplies (PAC 61
- Applying AC Power 61
- AS2000 Cabling 63
- Setting the Shelf 64
- Daisy-Chaining 65
- Test Equipment 67
- System Failure 68
- Alarm Description 69
- Classification 69
- Problem Types 69
- Configuration Problems 73
- Near End Far End 74
- Data Port 76
- Loopback (DPLB) 76
- Test Patterns 76
- Performance 77
- Register 77
- Definitions 77
- Data Processing 81
- Power Failure 82
- AC Power 83
- System Fault 85
- Isolation 85
- Compliance Statements 89
- Data Interface 90
- Specifications 90
- Mean Time 90
- Between Failure 90
- Required 91
- Information for 91
- Instructions and 91
- Testing 91
- Certifications and Compliance 92
- Illustrated Parts List 96
- Part Number: 458-501594-00X 99
- System Cables 100
- 458-501783-012 (12 ft.) 110
- 458-501784-006 (6 ft.) 112
- T1/E1 Line Interface Cables 116
- Part Number: 458-501768-0XX 118
- Part Number: 458-501769-XXX 119
- Acronyms and Definitions 121
- Frame Relay Access Device 141
- Local Area Network 149
- Megahertz 153
- Management Information 153
- Base (MIB) 153
- Multi-line Shelf 153
- payload loopback 158
- Permanent Virtual Circuit 159
- Dual-line Shelf 159
- Channel 160
- Service Unit (CSU) 160
- Telemetry Asynchronous 166
- Block Serial (TABS) 166
- Wide Area Network (WAN) 170
- Numerics 175
- VERILINK CORPORATION 179
- 127 JETPLEX CIRCLE 179
- MADISON, ALABAMA 35758 179
- TEL: (800) 837-4546 179
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