User Guide
Record of Revisions
User Guide
Contents
Registers
Command Mode
Callback Security and Remote Configuration
Manual Dial and Automatic Answer
Appendixes
Modem Testing
DIP-Switch Settings
Warranty, Service and Tech Support
Page
Introduction and Description
Introduction
How To Use This Manual
DIP-Switches
AT Command Mode Operation
Callback and Remote Configuration
Testing Your Modem
3 932 Series Features
Modem Features
1 2834 Series Features
2 1432 Series Features
Fax Features
Technical Specifications
Introduction and Description
Mode of Operation
Intelligent Features
Command Buffer
Transmit Level
Fax Carrier Frequencies
Carrier Frequencies
Carrier Frequencies 300 bps Bell Standard
Operating Temperature
Connectors
Diagnostics
Indicators
Models Only
Power
Modem LED Indicators
Controls on PC Board
MultiModemBA User Guide
Installation and Connection
Unpacking MT2834BA shown
What is in Your Modem Package?
Installation Procedure
Installation
Safety Warnings
MultiModemBA/BAI Connections
Loading Trio DataFAX Software
MultiModemBA User Guide
Is Your Modem Ready for Use?
MultiModemBA User Guide
Software Configuration and Modem Basics
How Can You Identify Your Uart Type?
Serial Port Limitations
16550 Uart and Windows
Configuring Your Software
Configuring Software for Your Modem
Software Configuration
Other Parameters
Changing Default Parameters
PC Initialization Strings
Terminal Emulation
Configuring Software for Your Computer
Configuring Software for the Remote System
Macintosh Initialization
AT &F S0=0 X4 &E14 M
When to Disable Data Compression
Disabling Error Correction
File Transfer Protocols
Simple Operations
Answer/Originate Voice/Data Toggle Switch
Modem Basics
MultiModemBA User Guide
Manual Dial and Automatic Answer
Dialing/On-Line/Answering
Manual Dial and Automatic Answer
Manual Call Origination
Automatic Answering
Handshaking Details
Manual Answering
Call Termination
Abort Timer
MultiModemBA User Guide
Command Mode
AT Command Editing
Functional Modes
Command Mode
Summary of AT Commands
Flow Control Disabled
Normal Mode
Auto-Reliable Mode
Reliable Mode
Callback Security Enable/Disable
Enable/Disable Reading Line Probe From DSP during handshake
Display of Signal Strength Information
Passwords for Callback Phone Numbers
Multi-Tech Result Codes Series
Result Codes
MultiModemBA User Guide Standard AT Result Codes Series
Dialing a Stored Number N
Dialing Commands Dialing Action Commands
Dial Command D
Continuous Redial not used in BAI a or
Set Pulse Dial Ratios &P
Dial Modifier Commands
Voice/Data Dialing $VD
Pulse or Tone Dial P T
Long Space Disconnect Y
Return to Command Mode After Dial Command Execution
Reverse the Mode of Operation R
Automatic Pauses in Dialing
Quiet Answer @
Calling Card Detect Tones $
Listing Numbers Stored in Memory L
Phone Number Memory Commands
Storing Phone Numbers D...N
Number Linking NN
Modem Reset Z
Configuration and Default Storage Commands
Loading Factory Defaults &F
Synchronous Transmit Clock Select &X
Async/Sync Mode Switching &M
Unix Uucp Spoofing $SP
Result Codes Multi-Tech or Standard AT &Q
Command Response Result Code Commands
Echo Command Mode Characters E
Result Codes Enable/Disable and No Response Answer Q
Result Codes Basic and Extended and Call Progress Selection
Bell/V.21 Tone
Phone Line Conditioning Commands
Enable/Disable Trelis Coded Modulation #T
Guard Tones Not Used in BAI Models &G
Cleardown at Disconnect &CD 2834 Series only
Fallback Modes When On-Line #F
Enable/Disable Lowspeed Fast Connect $FC 2834 Series only
Auto Speed Detect #A
CTS Control &R
7 RS-232C Interface Control Commands
Carrier Detect Control &C
Data Terminal Ready Control &D
DSR/CD Interaction Control &SF
Data Set Ready Control &S
CTS/RTS Interaction Control &RF
Reliable Mode &E2
Error Correction Commands
Normal Mode &E0
Auto-Reliable Mode &E1
Auto-Reliable Buffering $A
Mode Select #L
Originate Mode
Answer Mode
Retransmit Count $R
Enable/Disable Auto Reliable Fallback Character $F
Error Correction/300bps $E
Xon/Xoff Flow Control &E5
Flow Control Commands
Hardware Flow Control &E4
Hewlett-Packard ENQ/ACK Pacing &E9
Xon/Xoff Pass-Through &E7
Send Xon/Xoff Characters #X
Parity Selection #P
Normal Mode Modem Flow Control On &E11
Terminal/Computer Initiated Pacing &E13
Maximum Block Size &BS
Enq/Ack Pacing Commands
Normal/Auto-Reliable/Reliable Mode Commands
Xon/Xoff Pass-Through Commands
Modem Baud Rate $MB
Speed Conversion Commands
Speed Conversion $BA
Command Mode Series
Serial Port Baud Rate $SB
Immediate Action Commands
Off Hook H
Listing On-Line Diagnostics L8
Exiting Command Mode, Going Back On-Line O
Line Probe Commands 2834 Series only
Force Answer Mode a
MultiModemBA User Guide
Registers
Return Character
Number of Rings Until Modem Answers
Rings Which Have Occurred
Escape Code Character
Wait Time for Dial Tone
Time for Carrier Abort Timer
Line Feed Character
Backspace Character
S11 Tone Dialing Tone Spacing and Duration
S10 Carrier Loss Disconnect Delay Time
S13 Remote Configuration Escape Character
Carrier Detect Response Time
S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD
S15 Callback Time Delay
S16 Callback Attempts
S17 Changing Break Time
S32 Time Elapse for Escape Sequence
S26 Failed Password Attempts
S29 Local Inactivity Timer
S30 Inactivity Timer
S48 Program V.34bis Connect Speeds 2834 Series only
S36 Time Between DTR Inactive and Modem Off-Hook
S37 Time Between DTR Active and Modem On-Hook
Examples of Reading Values
Reading and Assigning S-Register Values
Examples of Assigning Values
AT Command and S-Register Summary
MultiModemBA User Guide
Callback Security and Remote Configuration
Callback Feature Description
To change your Remote Configuration feature status
Remote Configuration Description
Callback Security and Remote Configuration
AT#CBN1xxxxxxxxxxCR
To set parity of the password/message prompt
AT#CBN0xxxxxxxxxxCR
Callback Operational Sequence Procedures
Remote Configuration Operation Procedures StepProcedure
Remote Configuration Procedures
Change Login Password
Remote Configuration and Callback Security AT Commands
Assign Passwords for Callback Phone Numbers #CBN
Callback Security Enable/Disable
Erase Callback Phone Number #RDNxx
Erase Callback Password
Remote Configuration/Callback Security S-Registers
MultiModemBA User Guide
Modem Testing
Introduction
Local Analog Loopback Test/V.54 Loop
Modem Testing
100
Digital Loopback Test/V.54 Loop 2 Local/Manual
101
Digital Loopback Test/V.54 Loop 2 Remote/Automatic
4A. Back-to-Back Test Cabling
Back-to-Back Test
Local Analog Loopback Test Synchronous Mode
Synchronous Mode Testing
Synchronous Mode Digital Loopback Test local/manual 104
Digital Loopback Test Local/Manual Synchronous Mode
Synchronous Mode Digital Loopback Test remote/automatic 105
Digital Loopback Test Remote/Automatic Synchronous Mode
MultiModemBA User Guide 106
DIP-Switch Settings
PC Board 108
109
DIP-Switch Option Settings
DIP-Switch Settings
110
Switch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-UP
932 Series
111
112
113
114
Switch #16 Reserved for Future Use
MultiModemBA User Guide Series
115
Speaker Volume Control
Recording Option Configurations
Switch Function Position Effect
116
DIP Switches #13-14
DIP Switches #15-16
Warranty, Service and Tech Support
118
Limited Warranty
On-line Warranty Registration
Recording Modem Information
Service
Warranty, Service and Tech Support
Tech Support
To Download a file
Multi-Tech BBS
To log on to the Multi-Tech BBS
About Multi-Tech’s Internet Presence
Using FlashPro to Upgrade Modem Firmware
About the Multi-Tech Fax-Back Service
Upgrading the MultiModem
122
About Ordering Accessories
SupplyNet Online Ordering Instructions
Appendixes
124
Appendix a Troubleshooting
None of the LEDs Light When the Modem Is On
Modem Does Not Respond to Commands
125
Appendix a Troubleshooting
126
Modem Dials But Cannot Make a Connection
127
Modem Cannot Connect When Answering
Modem Disconnects While On-line
File Transfer Is Slower Than It Should Be
128
Am Losing Data
Am Getting Garbage Characters on the Monitor
129
Appendix B Ascii Conversion Chart
130
Appendix C Dial Pulse and Tone-Dial Frequencies
Dial Pulses
Tone Dial Frequencies
#An
Appendix D AT Command Summary
Command Values Description
$An
SN d
BS n
$BA n
CD n
133
$EBn
#Fn
$Fn
134
$Hn
#Ln
$MBn
Sr=n
NdNe
$Rn
RFn
#Tn
$SBn
SFn
$SPn
137
$VDn
#Xn
+++ATCR
Callback Security/Remote Configuration Command Summary
25bis Commands
Password Command Summary
140
Appendix E DIP-Switch Summary
Asynchronous Mode
141
Synchronous Mode
Appendix E DIP-Switch Summary
142
Appendix F S-Register Summary
S34
S29
S30
S32
145
Appendix G Result Code Summary
Appendix G Result Code Summary
Terse Digit Verbose Words Effect
146
Appendix H V.25bis Operation
Delayed and Forbidden Numbers
Appendix H V.25bis Operation
25bis Operation
148
25bis DIP-Switches
25bis Set-Up and Initialization
149
25bis Mode AT Commands
25bis Responses Result Codes
Dial Phone Number Provided CRN Command
25bis AT Commands
Enable/Disable V.25bis Mode $V Command
Change Serial Baud Rate CSP Command
DTR Dialing $D Command
Listing Delayed Phone Numbers RLD Command
Listing Forbidden Phone Number RLF Command
Disregard or Connect to Incoming Calls DIC or CIC Command
Austria
ITU V.25bis Country Specific Information
Italy
Switzerland
153
Appendix H V.25bis Operation France
Belgium
Singapore
Figure I-1. RS232 Cable IBM PC
Appendix I MultiModemBA Cables
Figure I-2. MAC Cable 155
Appendix J RS-232C Interface Specifications
156
Appendix J RS-232C Interface Specifications
Signal Function Assignment Circuit Source
Pin Designation Eia
Clear To Send Pin 5, CTS CB
Signal Ground Pin 7, SG AB
Received Data Pin 3, RD BB
Request To Send Pin 4, RTS CA
Receive Clock Pin 17, RC DD
Ring Indicator Pin 22, RI CE
Test Voltage Pin 9
Transmit Clock Pin 15, TC DB
159
Terminal Busy Out of Service Pin 25, OOS
External Transmit Clock Pin 24, XTC
European Directives User Guide Statement
EMC, Safety and Terminal Directive Compliance
International Modem Restrictions
New Zealand Telecom Warning Notice
161
FCC Regulations for Telephone Line Interconnection
Appendix K Regulatory Information
Industry Canada
Canadian Limitations Notice
Class a Statement
FCC Part
163
Index
164
Functional Description of RS232C SIG
165
166