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MultiModemBA User Guide
7.1 Introduction
There are several DIP-Switch options on the modem’s printed circuit (PC) board. The DIP-Switches
are accessible through a cut-out on the side of the modem. This chapter explains the modem’s
printed-circuit board options. Sixteen DIP-Switch settings and the modem's speaker volume control
are explained in detail, including all default settings.
OPEN
13 14 15 16
OPEN
123456789101112
LED
Indicators
16-position DIP-switch
Phone Jack
Line Jack
RS-232/V.24
Connector
Power Jack
Power Switch
Figure 7-1. PC Board
7.2 DIP-Switch Option Settings
Switch #1
Forced DTR -- "DTR"
(Asynchronous/Synchronous Mode/Leased Line/Dial-Up)
The modem must have a high DTR signal in order to operate. DTR is provided to the modem by the
terminal or computer to which it is attached, through pin 20 of the RS-232C/V.24 interface. If your
terminal or computer is not providing DTR to the modem, you can force the DTR signal high with DIP-
Switch #1.
DTR function normally = Switch #1 UP
DTR forced On = Switch #1 DOWN
Factory Default Setting = UP
Switch #2
Flow Control - &E4/&E5
(Asynchronous Mode/Leased Line/Dial-Up)
With Hardware Flow Control, the modem uses its RS-232C/V.24 interface to control the flow of data
from the computer or terminal to which it is attached. The CTS signal on Pin 5 of the RS-232C/V.24
is brought low to stop the flow of data, and is brought high to restart it. Place DIP-Switch #2 in the UP
position to enable Hardware Flow Control (
&E4
). Xon/Xoff Flow Control (
&E5
) is another flow control
method. Xon/Xoff characters in the data dictate the start and stop of data flow from the computer or
terminal. Place DIP-Switch #2 in the DOWN position to select Xon/Xoff Flow Control.
Hardware Flow Control (
&E4
) = Switch #2 UP
Xon/Xoff Flow Control (&E5) = Switch #2 DOWN
Factory Default Setting = UP
- BA-Series 1
- Intelligent Data/Fax Modem 1
- User Guide 1
- Contents 3
- 1.1 Introduction 6
- 1.2 How To Use This Manual 6
- 1.3 Modem Features 7
- 1.3.1 2834 Series Features 8
- 1.4 Fax Features 8
- 1.5 Technical Specifications 9
- 1.6 Power 10
- 1.7 Modem LED Indicators 11
- 1.8 Controls on PC Board 12
- 2.2 Installation 14
- 2.2.1 Safety Warnings 15
- 2.2.2 Installation Procedure 15
- EIA RS232C 16
- 3.1 Introduction 18
- 3.2 Configuring Your Software 18
- 3.4 PC Initialization Strings 18
- 3.4.2 Other Parameters 19
- 3.5.2 Terminal Emulation 20
- 3.5.3 File Transfer Protocols 20
- Chapter 4 - Command Mode 21
- 4.1 Introduction 22
- 4.1.1 AT Command Editing 22
- 4.1.2 Functional Modes 22
- 4.2 Summary of AT Commands 23
- 4.3 Result Codes 26
- 4.4 Dialing Commands 27
- 4.4.1 Dialing Action Commands 27
- 4.4.2 Dial Modifier Commands 28
- 1028806127853500$123456789 30
- Number Linking NN 31
- Modem Reset Z 32
- Unix UUCP Spoofing $SP 32
- Bell/V.21 Tone B 35
- Auto Speed Detect #A 36
- Carrier Detect Control &C 36
- CTS Control &R 37
- Data Set Ready Control &S 37
- Normal Mode &E0 38
- Auto-Reliable Mode &E1 38
- Reliable Mode &E2 38
- V.42 Mode Select #L 38
- Auto-Reliable Buffering $A 39
- 4.4.9 Flow Control Commands 40
- Hardware Flow Control &E4 41
- Xon/Xoff Flow Control &E5 41
- Xon/Xoff Pass-Through &E7 41
- Send Xon/Xoff Characters #X 42
- Maximum Block Size &BS 42
- Through and Pacing Commands 43
- Speed Conversion $BA 44
- Modem Baud Rate $MB 44
- Serial Port Baud Rate $SB 45
- Off Hook H 47
- BREAK AT<CR> 47
- Force Answer Mode A 47
- 4.4.13 Line Probe Commands 48
- Chapter 5 - S-Registers 49
- 5.1 Introduction 50
- &S 53
- (2834 Series only) 55
- Remote Configuration 57
- 6.1 Introduction 58
- Configuration 58
- Change LOGIN Password #I 62
- Local Inactivity Timer (S29) 64
- 7.1 Introduction 66
- "UUCP spoofing" 68
- 7.3 Speaker Volume Control 71
- DIP-Switches 72
- DIP Switches #13-14 73
- DIP Switches #15-16 73
- 8.1 Introduction 75
- 8.4 Replacement Parts 77
- 8.5 Technical Support 77
- 8.6 Internet Sites 77
- Appendixes 78
- Upgrade Overview 79
- Programming Complete 81
- Appendix B - Troubleshooting 82
- I Am Losing Data 85
- Password Command Summary 94
- V.25bis Commands 95
- Delayed and Forbidden Numbers 96
- V.25bis Operation 96
- V.25bis Mode AT Commands 97
- V.25bis AT Commands 98
- DTR Dialing ($D) Command 100
- NO CARRIER 101
- 25-PIN DTE 102
- Connector 102
- 25-PIN DCE 102
- FCC Part 15 103
- FCC Part 68 Telecom 103
- Canadian Limitations Notice 104
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