Multitech MULTI MODEM II MT5600BA Manual de usuario Pagina 42
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4 AT Commands, S-Registers, and Result Codes
36
MultiModemII User Guide
Command: &C
n
Data Carrier Detect (DCD) Control
Values: n = 0 or 1, 2 or 3, 4 or 5
Default: 1, 3, 4
Description: &C0 Forces the DCD circuit to always be high.
&C1 DCD goes high when the remote modem’s carrier signal is de-
tected, and goes low when the carrier signal is not detected.
&C2 DCD goes high 500 milliseconds after the CONNECT message is
generated.
&C3 DCD goes high when the CONNECT message is generated.
&C4 Disables &C5 command.
&C5 On UNIX systems, holds DCD low until the proper callback
security password has been entered or until a disconnect occurs.
This prevents the UNIX login prompt from being displayed be-
fore the callback security ENTER PASSWORD prompt appears.
Command: &D
n
Data Terminal Ready (DTR) Control
Values: n = 0, 1, 2, or 3
Default: 2
Description: This command interprets the high to low transition of the DTR
signal sent by the computer according to the supplied param-
eter. The action taken depends on the current &Q setting.
&D0 &Q0, &Q5, &Q6: DTR is ignored (assumed high). Allows op-
eration with computers that do not provide DTR.
&Q1: DTR drop causes the modem to hang up. Autoanswer is
not affected.
&Q2, &Q3: DTR drop causes the modem to hang up. Autoan-
swer is inhibited.
&D1 &Q0, &Q1, &Q5, &Q6: DTR drop is interpreted by the modem
as if the asynchronous escape sequence had been entered. The
modem returns to asynchronous command state without dis-
connecting.
&Q2, &Q3: DTR drop causes the modem to hang up. Autoan-
swer is inhibited.
&D2 &Q0–&Q6: DTR drop causes the modem to hang up. Autoan-
swer is inhibited.
&D3 &Q0, &Q1, &Q5, &Q6: DTR drop causes the modem to per-
form a soft reset as if the Z command were received. The &Y set-
ting determines which profile is loaded.
&Q2, &Q3: DTR drop causes the modem to hang up. Autoan-
swer is inhibited.
&Q5 or &Q6 and +FCLASS=1 or +FCLASS=2: Same as for &Q0.
Note: If &D1, &D2, or &D3 is set, the modem will not dial
without a DTR drop.
Command: &E
n
V.42 Error Correction Modes
Values: n = 0, 1, or 2
Default: 1
Description: &E0 V.42 non-error correction mode (V.42 disabled).
&E1 V.42 auto-reliable mode.
&E2 V.42 reliable mode (V.42 enabled).
- 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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