Multitech MULTI MODEM II MT5600BA Manual de usuario Pagina 44
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4 AT Commands, S-Registers, and Result Codes
38
MultiModemII User Guide
Command: &K
n
Flow Control Selection
Values: n = 0, 3, 4, 5, or 6
Defaults: 3 (data modem mode)
6 (fax modem and voice modes)
Description: &K0 Disables flow control.
&K3 Enables CTS/RTS hardware flow control.
&K4 Enables XON/XOFF software flow control.
&K5 Enables transparent XON/XOFF flow control.
&K6 Enables both RTS/CTS and XON/XOFF flow control.
Note: See also the &E command
Command: &M
n
Communications Mode
Values: n = 0–3
Default: 0
Description: This command determines the DTR operating mode. The mo-
dem treats the &M command as a subset of the &Q command.
&M0 Selects direct asynchronous operation. Note that the command
sequence &M0\N0 selects normal buffered mode, but the
command sequence \N0&M0 selects direct mode. This is be-
cause the \N0 command is analogous to the &Q6 command.
&M1 Selects synchronous connect mode with asynchronous offline
command mode.
&M2 Selects synchronous connect mode with asynchronous offline
command mode. Same as &M1 except that &M2 enables DTR
dialing of directory slot 0. The modem disconnects if DTR is
low for more than the period stored in S25.
&M3 Selects synchronous connect mode. This mode allows DTR to
act as a talk/data switch. The call is manually initiated while
DTR is inactive. When DTR becomes active, the handshake
proceeds in originate or answer mode according to S14 bit 7.
Command: &Q
n
Sync/Async Mode
Values: n = 0–3, 5, 6
Default: 5
Description: This command is an extension of the &M command, and is used
to control which connection modes are permitted. It is used in
conjunction with S36 and S48. (See also the \N command.)
&Q0 Selects direct asynchronous operation. See &M0.
&Q1 Selects synchronous connect mode with asynchronous offline
command mode. See &M1. (Serial interface operation only.)
&Q2 Selects synchronous connect mode with asynchronous offline
command mode and enables DTR dialing of directory 0. See
&M2. (Serial interface operation only.)
&Q3 Selects synchronous connect mode with asynchronous offline
command mode and enables DTR to act as a talk/data switch.
See &M3. (Serial interface operation only.)
&Q5 The modem will try to negotiate an error-corrected link. The
modem can be configured using S36 to determine whether a
failure will result in the modem disconnecting or falling back
to a non-error-correction connection. See also \N3.
&Q6 Selects asynchronous operation with speed buffering and no
error correction. Same as \N0.
- Model MT5600BA 1
- Model MT5600BL 1
- FCC Part 15 3
- Industry Canada 3
- Chapter 1: Introduction 4
- Chapter 2: Installation 4
- Chapter 6: Callback Security 5
- Chapter 8: Solving Problems 5
- Contents 6
- Product Description 8
- Features 8
- 1 Introduction 9
- Related Manuals 10
- What You Will Need 12
- Safety Warnings 12
- RS232 Connection 13
- Dialup Connection 13
- 2 Installation 14
- Installing the ModemDriver 15
- Removing an Old Modem Driver 15
- Using the 17
- Front Panel 17
- Modem Configuration 18
- LED Indicators 18
- Liquid Crystal Display (LCD) 19
- 3 Using the Front Panel 20
- Menu Overview 20
- Status Trunk 21
- Basic Options Trunk 22
- Advanced Options Trunk 24
- Diagnostic Options Trunk 26
- Caller ID Options Trunk 27
- Menu Options 28
- Basic Options 29
- Advanced Options 31
- Remote Configuration Options 33
- Diagnostic Options 33
- Phone Number Memory Options 33
- Caller ID Options 34
- AT Commands 35
- S-Registers & 35
- Result Codes 35
- S-Registers 54
- Configuration 62
- Basic Procedure 63
- 5 Remote Configuration 64
- Callback 65
- Security 65
- AT Command Method 66
- Front Panel Method 67
- At Command Method 68
- Calling Procedure 69
- Callback Security Commands 70
- Callback Assignments Form 71
- Leased Line 72
- Operation 72
- Two-Wire Setup 73
- Four-Wire Setup 74
- 7 Leased Line Operation 75
- Problems 77
- None of the Indicators Light 78
- 8 Solving Problems 79
- Data Is Being Lost 83
- Appendixes 85
- FCC Part 68 Telecom 86
- Fax Branding Statement 87
- Canadian Limitations Notice 88
- A Regulatory Compliance 89
- South African Notice 90
- B Technical Specifications 91
- Appendix C: Loopback Tests 93
- Test procedure 94
- C Loopback Tests 95
- Back-to-Back Test 96
- Ordering Accessories 99
- Technical Support 100
- Internet Sites 100
- Introduction 101
- Upgrade Overview 101
- E Upgrading the Modem 102
- MultiModemII User Guide 102
- Installation 104
- Calling the ISP 105
- Answering Calls 105
- Appendix G: Pin Descriptions 106
- RS-232 Cable Pinouts 107
- Leased Line Pinouts 108
- H ASCII Character Map 109
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