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Excalibur Multirate DAP Installation and Operation
5-44
Answerback
This parameter enables/disables the Answerback feature. When enabled, this parameter
allows the DAP to recover when the quality of the dial line signal degrades past an
acceptable level. When the DAP detects unacceptable signal quality, it briefly drops its
Clear-to-Send signal and clamps all received data to a Marking (l's) state. It then sends a
training sequence to the far-end unit. When the far-end unit receives the training
sequence, it sends a training sequence to the first DAP. If the training sequences are
successful, normal operation resumes. When the Answerback parameter is disabled and
the quality of the dial line degrades past an acceptable level, the unit is unable to start a
training sequence.
Transmit Equalizer
This parameter enables/disables the DAP's statistical transmit equalizer. When Stat is
selected, this equalizer provides additional compensation to the transmit signal,
improving performance on most lines. When Flat is selected, no additional compensation
is provided.
Program Resistor
This parameter appears on the screen only when the Compliance parameter is set for
Programmable Mode. Press the button beneath Ok. This allows a limiting resistor in the
telephone company's data jack to program the DAP so that the signal level received at the
central office does not exceed -12 dBm. This parameter must be set each time the unit is
connected to a different data jack.
Note: This parameter must be set to comply with FCC Part 68/DOC CS-03
requirements. Failure to set this parameter may cause the telephone company to request
that you disconnect the equipment.
Port RTS-DCD Simulation
This parameter enables/disables V.13 RTS-DCD Simulation when dial backup
connections are established.
Switched 56 Dial Parameters
The DTE data rate can not be modified when the DAP is in dial backup operation. The
rate selected for normal operation is maintained during dial backup operation with two
exceptions:
• 64 Kbps is automatically changed to 56 Kbps (CC64 operating mode).
- Excalibur 1
- Multirate DAP 1
- Warranty 2
- Milgo Solutions 3
- Customer Information Contacts 3
- About This Manual 5
- Terminology and Conventions 6
- Table of Contents 7
- Chapter 6 - On-Line Operation 11
- Chapter 7 - Troubleshooting 11
- Important Safety Instructions 15
- Excalibur Multirate DAP 16
- Chapter 1 17
- Introduction 17
- Standalone Model 20
- Central Site Model 21
- Standard Features 22
- Password Protection 23
- RTS-DCD Simulation 23
- Extended Range Operation 23
- Rate Adaption 23
- Built-In Diagnostic Tests 23
- Alarm Reporting 24
- Line Parameter Monitoring 24
- Call Messages 24
- CMS DSU Compatibility 25
- Multiport Frame Compatibility 25
- CMS Compatibility 25
- Backward Compatibility 26
- Dual Interface 27
- Integral Dial Backup 27
- Model for EDRS 29
- Chapter 2 31
- Operating Modes 31
- Primary Channel Interface 32
- Network Management Controller 32
- Main Channel Interruption 33
- Clear Channel 64 Kbps) 34
- Clear Channel 64 Kbps 35
- Clear Secondary Channel 35
- Antistreaming 36
- Call Establishment 38
- Call Answering 38
- Call Disconnection 39
- ISDN Integral Dial Operation 42
- Chapter 3 47
- Installing the DAP 47
- Cable Connections 48
- TO TELCO JACK FOR 55
- ANALOG IDBU OR TO 55
- ISDN BASIC RATE 55
- U-INTERFACE FOR 55
- ISDN IDBU 55
- TO TELCO JACK 57
- DMM Connector 61
- Setting the Jumpers 62
- Digital Bridge Board 68
- Connectors 70
- AC Power Connection 71
- Calibration 72
- Chapter 4 73
- Using the Front Panel 73
- What You Will See First 74
- Moving Through the Menus 74
- Status Display 76
- Entering Unit Addresses 77
- 79
- Entering the Password 80
- Changing the Password 81
- Locking Front Panel Functions 82
- Establishing a Security Code 83
- Front Panel Test 85
- Auto-Learn Network 86
- Event Displays 87
- Chapter 5 89
- Defining Operating Parameters 89
- R a t e M P F r m 91
- DAP Parameters 96
- Location 99
- Transmit Clock 100
- Port Receive Clock 100
- CTS Delay 101
- Squelch Primary Transmitter 101
- EIA Pin 21 102
- EIA Pin 18 102
- Remote Digital Loop 102
- DTR Control 103
- CTS Control 103
- RTS Simulation 103
- DCD Simulation 103
- Protocol 106
- Interface 106
- Latching Loopback 107
- Transmit Calibrate 107
- Secondary Channel 107
- Network Delay 108
- Automatic Poll 109
- Channel Parameters 110
- Escape Top 111
- Channel Assignment 114
- Naming Channels 115
- Port Rate Configuration 118
- RCP Parameters 120
- Controller 122
- RTS Mode 122
- DCD Mode 122
- Secondary Channel Format 122
- Local Diagnostics 123
- Remote Diagnostics 123
- Alarm Detection 123
- Local Alarm Display 124
- Analog Regeneration 124
- Digital Regeneration 124
- Diagnostic Compatibility 124
- Route Secondary Channel 124
- Analog Dial Parameters 126
- Dial Mode 127
- Wait to Dial 129
- Call Progress 129
- Automatic Dial 129
- Automatic Dial Timer 129
- Switch to Dial 130
- Automatic Disconnect 130
- Retry Attempts 130
- Dedicated Line Test 130
- Line Test Interval 130
- DCD Threshold 131
- Switched 56 Dial Parameters 132
- Port RTS-DCD Simulation 137
- Ring Detect 137
- ISDN Dial Parameters 138
- Switch Type 139
- Parameter Thresholds 142
- User LED 144
- Alias Parameter 145
- System Submenu 147
- Chapter 6 149
- On-Line Operation 149
- Line Quality Statistics 159
- N e x t P r e v 166
- ISDN Dial Backup Alarms 170
- Viewing Stored Alarms 171
- Dial Backup Procedures 173
- Entering Telephone Numbers 174
- P r i m a r y P h # = 175
- Originating Dial Backup Calls 179
- Analog Dial Line Tests 180
- Switched 56 Dial Line Tests 184
- ISDN Dial Line Tests 185
- Activating the Tests 186
- Activating Timed Tests 187
- Activating Loop Tests 188
- Sending Call Messages 189
- Chapter 7 193
- Troubleshooting 193
- Self-Error Test 194
- Local-Error Test 195
- End-to-End Error Test 196
- Network-Error Test 197
- DDS Loop Test 198
- Digital Loop Test 198
- V.54 Digital Loop Test 199
- Loop 2 and Loop 2 Error Tests 200
- Service Loops 201
- Individual Port Testing 206
- Channel Testing 207
- RTN Function 208
- Isolating Network Problems 209
- Appendix A 213
- Technical Specifications 213
- Operating Range 214
- Environmental 214
- Analog IDBU Option 215
- Appendix B 217
- Appendix C 219
- Status Notes 220
- Configuration - DAP Notes 222
- Configuration - DAP 223
- Continued 223
- Excalibur DAP 227
- Assignment, User, System 235
- Diagnostics Notes 236
- Diagnostics 237
- Dial, Call, Security 239
- Address, Service, RTN, ALNet 241
- Appendix D 243
- Regulatory Information 243
- TWFM-004 - Rev B.0 7/1/95 253
- BUSINESS REPL Y MAIL 254
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