Zyxel-communications Omni 288S Manual de usuario Pagina 33
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Chapter 3 - Basic Modem Operation
3-8
AT Command Description
E1 Echoes command characters
&C1 Carrier detect follows remote carrier
&D2 Modem disconnects on DTR on-to-off transition
&K4 Use both V.42 and MNP 4 error correction, and use
both V.42bis and MNP 5 data compression
&N0 Modem negotiates highest possible connection speed
ZyXEL Serial/Parallel I/O Card
For high-speed PC to modem communication, ZyXEL produces the special I/O
adapter card. This card includes a serial port and a parallel port, each with
special features, particularly when working with a ZyXEL modem, for example:
The serial port is 16550-compatible for most comm software's usage. It has a
speed of up to 460.8Kbps and data loss errors will not occur when working with
a ZyXEL modem's serial port. This solves high-speed communication problems in
Windows and other multi-tasking systems. The serial port has a 32-byte
transmission and a 32-byte receival FIFO to increase any comm program's
efficiency.
Helpful Hints for Mac Computers
Special AT Command Settings for Mac
For operation with Mac computers, you may use the factory default settings with
one exception. You must set the modem to ignore the DTR signal as follows.
Type:
AT&D0<enter> (set modem to ignore DTR)
AT&WZ<enter> (saves the settings to power-up profile)
Mac Serial Port
When you connect your Omni 288S modem to a Macintosh computer, make sure
the cable is a hardware handshaking cable. These cables are readily available.
The models Lisa, Macintosh 128 and Macintosh 512 don't have hardware
handshaking. The serial port on these (very outdated) models is provided as a 9-
pin connector similar to that of a PC. The serial port on all other Macintosh
models is a Mini-8.
Mac Software Tips
All terminal programs which make use of the hardware handshaking feature can
be used on the Apple Macintosh. Such programs are readily available as PD,
shareware or commercial software. One of the most powerful shareware
programs available is ZTerm.
- Omni 288S 1
- User’s Manual 1
- Limited Warranty 2
- Copyright 1996 by ZyXEL 2
- Acknowledgements 2
- FCC Part 15 Information 3
- FCC Requirements 3
- Table of Contents 6
- Chapter 1 - Introduction 11
- Unpacking Your Modem 12
- Becoming a Registered Owner 13
- Omni 288S Modem Features 13
- Intelligent Features 14
- Fax Compatibility 14
- Voice Features 14
- Technical Specifications 15
- Chapter 2 - Installation 16
- Telephone Jack 17
- Microphone 17
- Windows 95 Dial-up Networking 20
- Understanding AT Commands 26
- Dialing using the ATD Command 27
- Making Your First Connection 28
- Modem Result Codes 30
- Viewing S Register Values 30
- Non-Volatile Memory 31
- Mac Serial Port 33
- Mac Software Tips 33
- Serial Cable 34
- Basic Modem Settings for UNIX 34
- Unix Software Tips 34
- Front Panel LEDs 35
- DTE Interface 36
- RS-232C or EIA-232D/E 37
- Serial RS-232C Cable 37
- Error Control 39
- Data Compression 40
- Run Length Encoding 41
- Adaptive Frequency Encoding 41
- String Coding 41
- Hardware CTS/RTS 42
- Software XON/XOFF 42
- V.25bis Command Set 43
- Clock Options 44
- RTS Options 44
- Command State Options 44
- Dialing from Synchronous Mode 45
- Leased Line Handshaking 46
- Manual Connect 47
- Auto Handshake 47
- Cellular Phone Systems 48
- Cellular Impairments 48
- ZyCellular Modes 49
- Cellular Mode Usage 50
- Office Installation 53
- Security Functions 54
- Remote Configuration 55
- Distinctive Ring 59
- Setting Up EDR 61
- EDR Application Example 62
- Chapter 9 - Fax Operation 63
- Fax Command sets 64
- Class 1 Command Set 65
- Class 2 Command Set 66
- Class 2.0 Command Set 70
- Extended Fax AT Command Set 75
- Fax Reception from a BBS 78
- Set external mail as: 79
- Voice Data Compression 80
- Voice Input/Output Devices 81
- Recording a greeting message 82
- Voice Command State 85
- Voice Data States 86
- Voice Data Reception State 86
- Event Detection and Reporting 87
- Voice AT Commands 89
- AT Command Syntax 90
- Response Syntax 90
- Flow Control 90
- ATD (with +FCLASS=8) 91
- ATH (with + FCLASS=8) 91
- AT+FCLASS=<mode> 91
- Voice Mode Action Commands 93
- AT+VTS=<string> 94
- AT+VTS=? 94
- AT+VTX 94
- AT+VGR=<gain> 95
- AT+VGR? 95
- AT+VGR=? 95
- AT+VGT=<level> 95
- AT+VLS? 97
- AT+VLS=? 97
- AT+VSD? 97
- AT+VSD=? 97
- Basic AT Command Set 99
- Description of ATI2 Output: 101
- Extended AT& Command Set 102
- Extended AT* Command Set 105
- S-Register Descriptions 107
- Result Code Options 116
- Diagnostics 118
- Resetting The Modem 119
- Loopback Tests 119
- Indicator Lights 120
- Trouble Shooting 121
- Command Echo Problems 122
- Answer Problems 123
- Dialing Problems 123
- Data Transfer Problems 123
- Connect Problems 124
- Upgrading by Flash EPROM 125
- Kernel Recovery Mode 125
- ZyXEL Phone Numbers 126
- Online Access 127
- Phone Jack Pinouts 128
- PC Serial Port Pinouts 128
- Macintosh Serial Port Pinouts 129
- Glossary 130
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