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
1 2834 Series Features
Modem Features
2 1932 Series Features
Fax Features
3 1432 Series Features
Technical Specifications
Introduction and Description
Mode of Operation
Intelligent Features
Command Buffer
Carrier Frequencies 300 bps Bell Standard
Fax Carrier Frequencies
Lease Line Restoral
Carrier Frequencies
Operating Temperature
Connectors
Diagnostics
Indicators
Modem LED Indicators
Power
Models Only
Controls on PC Board
MultiModemBL User Guide
Installation and Connection
Unpacking MT2834BL shown
What is in Your Modem Package?
Safety Warnings
Installation
Installation Procedure
MultiModemBL/BLI Connections
MultiModemBLK Connections
Cabling Procedure MT1432BLK and MT2834BLK
Loading Trio DataFAX Software
Installation and Connection
Is Your Modem Ready for Use?
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
PC Initialization Strings
Changing Default Parameters
Other Parameters
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
Modem Basics
Answer/Originate Voice/Data Toggle Switch
Simple Operations
MultiModemBL User Guide
Manual Dial and Automatic Answer
Dialing/On-Line/Answering
Manual Dial and Automatic Answer
Manual Dial Backup Call Termination
Dial Backup and Leased Line Restoral
Automatic Leased Line Restoral Operation
Manual Call Origination
Dial-Up Operation
Manual Answering
Automatic Answering
Handshaking Details
Abort Timer
Call Termination
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
MultiModemBL 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 BLI/BLK a or
Set Pulse Dial Ratios &P Not used in BLK
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
Loading Factory Defaults &F
Configuration and Default Storage Commands
Modem Reset Z
Unix Uucp Spoofing $SP
Async/Sync Mode Switching &M
Synchronous Transmit Clock Select &X
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 Not Used in BLK Models B
Phone Line Conditioning Commands
Enable/Disable Trelis Coded Modulation #T
Guard Tones Not Used in BLI or BLK Models &G
Enable/Disable Lowspeed Fast Connect $FC 2834 Series only
Fallback Modes When On-Line #F
Cleardown at Disconnect &CD 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
CTS/RTS Interaction Control &RF
Data Set Ready Control &S
DSR/CD Interaction Control &SF
Reliable Mode &E2
Error Correction Commands
Normal Mode &E0
Auto-Reliable Mode &E1
Auto-Reliable Buffering $A
Mode Select #L
Originate Mode
Answer Mode
Error Correction/300bps $E
Enable/Disable Auto Reliable Fallback Character $F
Retransmit Count $R
Modem-Initiated Flow Control
Flow Control Commands
Hardware Flow Control &E4
Xon/Xoff Flow Control &E5
Send Xon/Xoff Characters #X
Xon/Xoff Pass-Through &E7
Hewlett-Packard ENQ/ACK Pacing &E9
Parity Selection #P
Normal Mode Modem Flow Control On &E11
Terminal/Computer Initiated Pacing &E13
Maximum Block Size &BS
Xon/Xoff Pass-Through Commands
Normal/Auto-Reliable/Reliable Mode Commands
Enq/Ack Pacing Commands
Speed Conversion $BA
Speed Conversion Commands
Modem Baud Rate $MB
Command Mode Series
Serial Port Baud Rate $SB
Immediate Action Commands
Off Hook H
Listing On-Line Diagnostics L8
Force Answer Mode a
Line Probe Commands 2834 Series only
Exiting Command Mode, Going Back On-Line O
MultiModemBL 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
S17 Changing Break Time
S15 Callback Time Delay
S19 Dial-Back Timer
S16 Callback Attempts
S25 DTR Dropout Time
S26 Failed Password Attempts
S29 Local Inactivity Timer
S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD
S37 Time Between DTR Active and Modem On-Hook
S30 Inactivity Timer
S32 Time Elapse for Escape Sequence
S36 Time Between DTR Inactive and Modem Off-Hook
S48 Program V.34bis Connect Speeds 2834 Series only
Examples of Assigning Values
Reading and Assigning S-Register Values
Examples of Reading Values
AT Command and S-Register Summary
Callback Security and Remote Configuration
Callback Feature Description
Callback Security and Remote Configuration
Remote Configuration Description
To change your Remote Configuration feature status
AT#CBN0xxxxxxxxxxCR
To set parity of the password/message prompt
AT#CBN1xxxxxxxxxxCR
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
MultiModemBL 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
MultiModemBL User Guide 106
DIP-Switch Settings
PC Board BL models 108
DIP-Switch Settings
DIP-Switch Option Settings
109
1432 Series
Switch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-UP
110
111
112
113
MultiModemBL User Guide Series
Speaker Volume Control
114
Switch Function Position Effect
Recording Option Configurations
115
DIP Switches #15-16
DIP Switches #13-14
116
Warranty, Service and Tech Support
On-line Warranty Registration
Limited Warranty
118
Recording Modem Information
Service
Warranty, Service and Tech Support
Tech Support
To log on to the Multi-Tech BBS
Multi-Tech BBS
To Download a file
About Multi-Tech’s Internet Presence
Using FlashPro to Upgrade Modem Firmware
About the Multi-Tech Fax-Back Service
Upgrading the MultiModem
SupplyNet Online Ordering Instructions
About Ordering Accessories
122
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
Am Getting Garbage Characters on the Monitor
Am Losing Data
128
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
$Fn
$EBn
#Fn
$FCn
$MBn
$Hn
L10
#Ln
Sr=n
NdNe
$Rn
RFn
#Tn
$SBn
SFn
$SPn
+++ATCR
#Xn
137
Callback Security/Remote Configuration Command Summary
25bis Commands
Password Command Summary
Asynchronous Mode
Appendix E DIP-Switch Summary
140
Appendix E DIP-Switch Summary
Synchronous Mode
141
142
Appendix F S-Register Summary
S29
S24
S25
S26
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
25bis Set-Up and Initialization
25bis DIP-Switches
148
25bis Responses Result Codes
25bis Mode AT Commands
149
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 MultiModemBL Cables
Figure I-4. 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
External Transmit Clock Pin 24, XTC
Terminal Busy Out of Service Pin 25, OOS
159
160
Appendix K Regulatory Information
EMC, Safety and Terminal Directive Compliance
Compliance with European Community Requirements
European Directives User Guide Statement
New Zealand Telecom Warning Notice
International Modem Restrictions
162
163
FCC Regulations for Telephone Line Interconnection
Industry Canada
Canadian Limitations Notice
Class a Statement
FCC Part
165
Index
166
Functional Description of RS232C SIG
167
XON/XOFF
168