Multitech MTA128ST Owner's Manual Page 61
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AT Commands/S-Registers
4.4 Using AT Commands to Operate the MTA128ST
You can configure and operate the MTA128ST entirely with AT commands, if you
like. Remember, you can issue AT commands only from a terminal or from a
computer running a communications program in terminal mode. This section de-
cribes how to use AT commands for basic operations, such as calling, answering a
call, and hanging up.
4.4.1 Modes of Operation
The MTA128ST has three modes of operation: offline command mode, online
command mode, and data mode.
Offline Command Mode
In offline command mode, the MTA128ST communicates with the terminal or
computer and responds to AT commands. There is no data communications link
with a remote device.
Data Mode
The MTA128ST enters data mode when it makes a successful data communica-
tions link with a remote device. In data mode, the MTA128ST can send and re-
ceive data, but it does not respond to AT commands. Instead, it treats them as data,
and transmits them to the remote device.
Online Command Mode
In online command mode, the MTA128ST responds to AT commands while main-
taining a data communications link; however, transmission of data is suspended.
To enter online command mode from data mode, type the escape sequence
+++AT<CR>. To return to data mode from online command mode, type
ATO<CR>.
4.4.2 Making a Call
Before you can place a data call, you must configure the MTA128ST for the local
switch type, serial port speed, and the data type of the ISDN device you want to
call. See Chapter 3, Configuration Utilities.
- Model MTA128ST 1
- Owner's Manual 2
- Contents 4
- Contents 5
- Contents 6
- Chapter 1--Introduction 7
- 1.2 Features 7
- 8-IWay Hopper 8
- 1.4 Technical Specifications 9
- Introduction/Description 10
- 10-IWay Hopper 10
- Chapter 2--Introduction 11
- 2.2 Safety Warnings 11
- 2.4 Connecting to Power 12
- 2.5 Configuring the MTA128ST 13
- 14-IWay Hopper 14
- Installation 14
- 2.7 LED Indicators 15
- 16-IWay Hopper 16
- 17-IWay Hopper 17
- Installation 17
- Chapter 3--Introduction 18
- 3.2 Before You Start 19
- 20-Iway Hopper 20
- Configuration Utilities 20
- Call Control Configuration 20
- 21-IWay Hopper 21
- Com Port Settings 21
- 22-Iway Hopper 22
- 23-IWay Hopper 23
- 24-Iway Hopper 24
- 25-IWay Hopper 25
- 3.4 ConfigMenu 26
- 27-IWay Hopper 27
- ConfigMenu Menus 27
- 28-Iway Hopper 28
- 3.6 AT Commands 29
- Chapter 4--Introduction 30
- 4.1.1 Entering AT Commands 30
- 31-IWay Hopper 31
- AT Commands/S-Registers 31
- Command Function Section 31
- 32-IWay Hopper 32
- 4.1.2 Command Implementation 33
- 34-IWay Hopper 34
- 35-IWay Hopper 35
- 36-IWay Hopper 36
- 37-IWay Hopper 37
- 38-IWay Hopper 38
- 39-IWay Hopper 39
- 40-IWay Hopper 40
- 41-IWay Hopper 41
- 42-IWay Hopper 42
- 43-IWay Hopper 43
- 44-IWay Hopper 44
- 45-IWay Hopper 45
- 46-IWay Hopper 46
- 47-IWay Hopper 47
- 48-IWay Hopper 48
- 49-IWay Hopper 49
- 50-IWay Hopper 50
- 4.1.5 Data Call Commands 51
- 52-IWay Hopper 52
- 53-IWay Hopper 53
- 4.2 S-Registers 54
- 55-IWay Hopper 55
- 56-IWay Hopper 56
- 57-IWay Hopper 57
- 58-IWay Hopper 58
- 4.3 Result Codes 59
- 60-IWay Hopper 60
- 4.4.1 Modes of Operation 61
- 4.4.2 Making a Call 61
- 62-IWay Hopper 62
- Dialing 62
- 4.4.3 Answering a Call 63
- 4.4.4 Hanging Up 64
- Chapter 5--Introduction 65
- 5.2 Troubleshooting 65
- 66-IWay Hopper 66
- Troubleshooting 66
- 67-IWay Hopper 67
- 68-IWay Hopper 68
- 69-IWay Hopper 69
- 70-IWay Hopper 70
- Data Is Being Lost 71
- Chapter 6--Introduction 72
- 6.2 Limited Warranty 72
- 6.3 Technical Support 73
- 6.3.2 Service 73
- 6.4 The Multi-Tech BBS 74
- 75-Iway Hopper 75
- 76-IWay Hopper 76
- 6.6 About CompuServe/Internet 77
- Quick Setup Factory Profiles 78
- Quick Setup Example 78
- 79-IWay Hopper 79
- Configuration Profiles 79
- 80-IWay Hopper 80
- 81-IWay Hopper 81
- 82-IWay Hopper 82
- 83-IWay Hopper 83
- MTA128ST/Revision D PC Board 84
- MTA128NT/Revision B PC Board 84
- Product Update 100
- 107-IWay Hopper 107
- Index 108
- 109-IWay Hopper 109
- 111-IWay Hopper 111
- 113-IWay Hopper 113
- 115-IWay Hopper 115
- 117-IWay Hopper 117
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