Compaq 1500 Anleitung zur Fehlerbehebung Seite 173
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Modem Commands C-3
Table C-1 Continued
Command Description
Nn Modulation Handshake. ATNn controls whether or not the local modem
performs a negotiated handshake at connection time with the remote
modem when the communication speeds of the two modems are
different.
Parameters: n = 0, 1
n = 0 When originating or answering, handshake only at the
communication standard specified by S37 and the ATB command.
n = 1 When originating or answering, begin the handshake only at the
communication standard specified by S37 and the ATB command.
During handshake, fallback to a lower speed may occur (default).
On Online Command. ATOn forces the modem to the online mode.
Parameters: n = 0, 1, 3
n = 0 Go online
n = 1 Go online and initiate equalizer retrain before returning to online
data mode
n = 3 Go online and issue a rate renegotiation before returning to
online data mode
NOTE: Use this command to return to the online mode after "escaping"
to the command mode.
P Pulse Dial. ATP sets the dialing mode to Pulse. All calls will remain
Pulse until Tone dialing is selected (T command).
This command can also be used as a dial modifier.
Parameters: none
NOTE: Pulse dialing is not available in some countries. The P
command is ignored in those countries.
Qn Result Code Suppression. ATQn enables the modem to send result
codes.
Parameters: n = 0, 1
n = 0 Enables result codes (default)
n = 1 Disables return of result codes (quiet)
Sr=n Write to an S Register. ATSr=n sets register "r" to the value "n." The
contents of these registers can be modified with this command.
Parameters: none
Range: r = 0 - 27, 29, 31 - 33, 35, 37, 89 (register number)
n = 0 - 255 (value)
NOTE: Writing to reserved registers or read-only registers may cause
unpredictable results. See the S Resigister command set registers.
- Maintenance and Service Guide 1
- Technician Notes 2
- Laser Safety 3
- CDRH Regulations 3
- Battery Notice 4
- Serial Number 4
- Contents 6
- Chapter 7 8
- Chapter 8 9
- Chapter 9 9
- Contents ix 10
- Computer Product Description 11
- 1.2 Standard Features 12
- 1.2.1 Software Fulfillment 13
- 1.3 Options 14
- 1.3.4 External Keyboards and 15
- Pointing Devices 15
- 1.3.5 External Monitors 15
- 1.4.2 Right Side Components 17
- 1.4.3 Rear Components 18
- 1.4.4 Bottom Components 19
- 1.4.5 Status Panel Lights 20
- Description 21
- 2.3.2 Rear Components 26
- Troubleshooting 28
- 3.1 Preliminary Steps 29
- Troubleshooting 3-3 30
- 3.4 POST Error Messages 31
- Table 3-1 32
- Warning Messages 32
- Table 3-2 33
- Fatal Error Messages 33
- Table 3-3 33
- Fatal Error Beep Codes 33
- 3.5 Compaq Utilities 34
- 3-8 Troubleshooting 35
- Computer Checkup 36
- 3-10 Troubleshooting 37
- 3.6 Diagnostic Error Codes 38
- 3-12 Troubleshooting 39
- Troubleshooting 3-13 40
- Table 3-11 41
- Video Test Error Codes 41
- Table 3-12 42
- Audio Test Error Codes 42
- Table 3-13 43
- Table 3-14 43
- CD-ROM Test Error Codes 43
- 3.7.1 Solving Minor Problems 44
- Table 3-16 45
- Troubleshooting 3-19 46
- Table 3-17 47
- Solving Hard Drive Problems 48
- Solving CD-ROM Drive Problems 48
- Table 3-20 49
- Table 3-21 49
- Table 3-22 50
- Table 3-23 50
- Solving Memory Problems 51
- Solving PC Card Problems 52
- Table 3-25 Continued 53
- Solving Power Problems 54
- Solving Printer Problems 55
- Solving Screen Problems 55
- Table 3-28 56
- Table 3-29 57
- Troubleshooting 3-31 58
- 3-32 Troubleshooting 59
- Solving Network Problems 60
- 3-34 Troubleshooting 61
- 4.1 System Unit 63
- 4.2 Mass Storage Devices 65
- 4.3 Cables and Power Cords 67
- 4.5 Options 71
- 4.6 Miscellaneous Parts 73
- 4.8 Shipping Boxes 75
- 4.9 Documentation 75
- 5.1 System Unit 77
- Removal and Replacement 79
- Preliminaries 79
- Equipment 80
- Removing Batteries 80
- Preventing Damage to Drives 81
- Grounding Methods 81
- Grounding Workstations 82
- Grounding Equipment 82
- 6.2 Service Considerations 84
- 6.3 Serial Number 84
- Procedures 85
- 7.3 Design Overview 87
- 7.3.3 Video system 88
- 7.4.2 Undocking the Computer 89
- 7.4.3 Battery Pack 90
- To install the battery pack: 91
- 7.4.4 DualBay Devices 92
- 7.4.5 PCMCIA 93
- 7.5 Modem 94
- 7.6 CD-ROM Drive 95
- 3. Remove the CD-ROM drive 96
- 7.7 Keyboard 97
- 7.8 Memory Board 100
- 7.9 Hard Drive 103
- 7.10 Lithium Real Time Clock 105
- 8. Remove the RTC battery 106
- Cover and Microphone 107
- 5. Remove the microphone 109
- 7.12.1 Clutch Covers 110
- 7.12.2 Display Assembly 111
- 7.12.3 Clutches 112
- 5. Remove the display bezel 113
- 7. Remove the display clutch 115
- 7.12.4 Display latches 116
- 7.13 Top Cover Assembly 118
- 7.13.1 Power Button 120
- 7.13.2 Suspend Button 121
- 7.14 LED Status Panel 124
- 7.16 DC-DC Converter 127
- 7.17 Fan 131
- Figure 7-42. Removing the Fan 132
- 7.18 I/O Fixture Connector 133
- 7.19 System Board 135
- 7.20 AC Power 137
- 7.21 External Computer 138
- Components 138
- 7.21.2 Computer Feet 138
- Upgrade Procedures for the 139
- Convenience Base 139
- Ethernet Network Module 140
- 5. Remove the 10BaseT module 144
- Specifications 148
- 9.1 Computer 149
- 9.2 Displays 150
- 9.3 Hard Drives 151
- 9.4 Diskette Drive 152
- 9.5 CD-ROM Drive 153
- 9.6 Battery Packs 154
- 9.7 Convenience Base 155
- 9.8 External Power Supplies 156
- Table 9-11 157
- External Battery Charger 157
- 9.9 System Interrupts 158
- 9.10 System DMA 158
- 9.11 System I/O Address 159
- Table 9-17 Continued 160
- 9.12 System Memory Map 161
- Table A-7 164
- Parallel 164
- Table A-8 164
- Table A-9 165
- Expansion Connector 165
- Table A-9 Continued 166
- Table A-10 168
- Speaker Connector 168
- Power Cord Set Requirements 169
- Country-Specific Requirements 170
- Modem Commands 171
- Table C-1 Continued 172
- Command Description 172
- Table C-2 175
- AT Commands 175
- Table C-2 Continued 176
- Table C-3 178
- Fax Commands 178
- Table C-3 Continued 179
- Table C-4 181
- Dial Modifiers 181
- 1.1 Models and Features 184
- 1.2 Features 185
- 1.3 Software Fulfillment 186
- Universal Serial Bus 187
- Battery Spacer Door 187
- Illustrated Parts for the 188
- Computer 188
- Table 4-1 189
- System Unit 189
- Table 4-2 190
- Mass Storage Devices 190
- Table 4-3 191
- Cables and Power Cords 191
- Table 4-4 192
- Standard and Optional Boards 192
- Table 4-5 193
- Table 4-6 194
- Miscellaneous Parts 194
- Table 4-7 195
- Accessories 195
- Option Spares 196
- 9.0 Specifications 197
- Physical Configuration 198
- Random < 150 ms 199
- Table 9-3 200
- 12.1-inch TFT, SVGA Display 200
- Appendix C 201
- Continued 201
- Continued 205
- Index I-1 214
- I-2 Index 215
- Index I-3 216
- I-4 Index 217
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