Verilink AS2000: The Basics (880-502981-001) Product Manual Uživatelský manuál Strana 135
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Acronyms and Definitions
Verilink Access System 2000: Basics Glossary-15
Digital Signal Level 3 DS3 is 28 DS1 signals assembled
with a two-step multiplexing
process. The 28 signals are
multiplexed into seven DS2
signals. The seven DS2 signals are
multiplexed into one DS3 signal.
Each multiplexing step uses bit
stuffing to manage the different
input frequencies, if required.
Comes in two formats: --M13
format (cannot provide end-to-end
path parity information). --C-
bit.format DS3 overhead (OH) bits
that provides alignment, error
checking, in-band
communications, and bit stuffing
control information. The overhead
bits are located in the first bit
position of every block.
DIM Verilink’s data interface module, a
type of
connector interface
modules (CIM)
used with Verilink
DIUs.
Direct Current See
DC
.
Discard Eligibility (DE) In frame relay networks, a bit used
to identify which frames to discard
if congestion occurs in order to
stay within the Committed
Information Rate.
DIU Verilink’s
Data Interface Unit
(DIU)
.
DLCI Data Link Connection Identifier. In
frame relay networks, a unique
value in the frame overhead bits
used to by the service provider to
direct the frame to the correct
endpoint. The DLCI identifies
which permanent virtual circuit
(PVC) will be used for that
particular frame.
DLS See
Dual-line Shelf
.
doubler Device used to regenerate signals
on HDSL copper pairs. Similar in
function to a T1 repeater.
drain Cabling term for a chassis ground
or shield ground.
drop and insert That process where a part of the
information carried in a
transmission is demodulated
(dropped) at an intermediate point
and different information is
entered (inserted) for subsequent
transmission.
DS0 See
Digital Signal Level 0
.
DS1 See
Digital Signal Level 1
.
- 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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