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MultiModemBL User Guide
Another asynchronous mode concern is the problem of connecting at a different speed than the
speed at which the serial port is set. If your modem port speed is different from the serial port speed,
you must either:
1) Enable speed conversion and have flow control on, or
2) Enable connect responses (with the ATX1 command) and change the serial baud rate
after receiving a connect message.
If the $VD1 command is entered when in Auto-Answer mode, the modem answers immediately upon
receiving the first ring.
There is no disconnect message (NO CARRIER) if a normal connection is made.
V.25bis Set-Up and Initialization
Before you operate your modem in the V.25bis mode, you need to make sure it is set up properly
(various RS-232 lines such as DSR and CTS act as specified in the V.25bis standard). Setup
involves proper DIP-Switch settings and soft-switches (software controlled conditions).
V.25bis DIP-Switches
#1 Unforced DTR
#2 NA
#3 NA
#4 NA
#5 Auto-Answer enabled
#6 Async - Max throughput set
Sync - Slave Clocking unforced
#8 Command Mode forced
#9 Digital Loopback Off
#10 Dial-Up
#11 Async - AT/Multi-Tech Resp.
#12 Async/Sync mode set per requirements
- BL-Series 1
- Intelligent Data/Fax Modem 1
- User Guide 1
- Contents 3
- Chapter 5 - Command Mode 4
- Chapter 6 - S-Registers 4
- Chapter 8 - Modem Testing 5
- 1.1 Introduction 8
- 1.2 How To Use This Manual 8
- 1.3 Modem Features 10
- 1.3.1 2834 Series Features 10
- 1.3.2 1932 Series Features 10
- 1.3.3 1432 Series Features 11
- 1.4 Fax Features 11
- 1.5 Technical Specifications 12
- 1.6 Power 16
- 1.7 Modem LED Indicators 16
- 1.8 Controls on PC Board 17
- MADE IN U.S.A 20
- EIA RS232C 22
- 3.1 Introduction 28
- 3.2 Serial Port Limitations 28
- 3.3 Configuring Your Software 29
- 3.4 PC Initialization Strings 30
- 3.4.2 Other Parameters 30
- 3.5 Macintosh Initialization 31
- 3.6.2 Terminal Emulation 31
- 3.6.3 File Transfer Protocols 32
- 3.8 Modem Basics 33
- 3.8.1 Simple Operations 33
- 4.1 Introduction 36
- 4.2 Dialing/On-Line/Answering 36
- 4.6 Dial-Up Operation 38
- 4.7 Manual Call Origination 38
- 4.8 Automatic Answering 39
- 4.9 Manual Answering 39
- 4.10 Handshaking Details 40
- 4.11 Call Termination 40
- 5.1 Introduction 42
- 5.1.1 AT Command Editing 42
- 5.1.2 Functional Modes 43
- 5.2 Summary of AT Commands 44
- 5.3 Result Codes 47
- 5.4 Dialing Commands 49
- 5.4.1 Dialing Action Commands 49
- 5.4.2 Dial Modifier Commands 50
- 1028806127853500$123456789 52
- Quiet Answer @ 52
- Storing Phone Numbers D...N 53
- Number Linking NN 53
- Modem Reset Z 54
- Unix UUCP Spoofing $SP 55
- Auto Speed Detect #A 60
- Carrier Detect Control &C 61
- CTS Control &R 61
- Data Set Ready Control &S 62
- Normal Mode &E0 63
- Auto-Reliable Mode &E1 63
- Reliable Mode &E2 63
- V.42 Mode Select #L 64
- Auto-Reliable Buffering $A 64
- Retransmit Count $R 65
- 5.4.9 Flow Control Commands 66
- Xon/Xoff Pass-Through &E7 67
- Send Xon/Xoff Characters #X 67
- Maximum Block Size &BS 68
- Parity Selection #P 68
- Through and Pacing Commands 69
- Speed Conversion $BA 70
- Modem Baud Rate $MB 70
- Serial Port Baud Rate $SB 72
- Help Screens $H 73
- Inquiry for Product Code I 73
- Listing S-Register Values L6 73
- Off Hook H 74
- BREAK AT<CR> 74
- Force Answer Mode A 75
- 6.1 Introduction 78
- Remote Configuration 87
- 7.1 Introduction 88
- Configuration 89
- Change LOGIN Password #I 93
- Change SETUP Password #S 93
- Callback Time Delay (S15) 95
- Callback Attempts (S16) 95
- Local Inactivity Timer (S29) 95
- 8.1 Introduction 98
- Digital Analog 99
- Digital Analog DigitalAnalog 100
- 8.5 Back-to-Back Test 102
- 8.6 Synchronous Mode Testing 103
- MultiModemBL User Guide 106
- 9.1 Introduction 108
- 9.3 Speaker Volume Control 114
- DIP-Switches 115
- (-9db/0dB)*/(-15db/-10dB) UP 115
- DIP Switches #13-14 116
- DIP Switches #15-16 116
- 10.1 Introduction 118
- 10.2 Limited Warranty 118
- 10.3 Tech Support 119
- 10.4 Service 119
- 10.5 The Multi-Tech BBS 120
- Appendixes 123
- Appendix A - Troubleshooting 124
- I Am Losing Data 128
- Dial Pulses 130
- Tone Dial Frequencies 130
- Appendix D - Command Summary 131
- Password Command Summary 139
- V.25bis Commands 139
- Asynchronous Mode 140
- Synchronous Mode 141
- Delayed and Forbidden Numbers 147
- V.25bis Operation 147
- V.25bis Mode AT Commands 149
- V.25bis AT Commands 150
- DTR Dialing ($D) Command 151
- 25-PIN DTE 154
- Connector 154
- 25-PIN DCE 154
- Test Voltage - Pin 9, XV 158
- Canadian Limitations Notice 164
- Class A Statement 164
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