User Guide
User Guide
Record of Revisions
Contents
Manual Dial and Automatic Answer
Command Mode
Callback Security and Remote Configuration
Registers
Warranty, Service and Tech Support
Modem Testing
DIP-Switch Settings
Appendixes
Page
Introduction and Description
How To Use This Manual
Introduction
Testing Your Modem
AT Command Mode Operation
Callback and Remote Configuration
DIP-Switches
2 1932 Series Features
Modem Features
1 2834 Series Features
3 1432 Series Features
Fax Features
Technical Specifications
Command Buffer
Mode of Operation
Intelligent Features
Introduction and Description
Carrier Frequencies
Fax Carrier Frequencies
Lease Line Restoral
Carrier Frequencies 300 bps Bell Standard
Indicators
Connectors
Diagnostics
Operating Temperature
Models Only
Power
Modem LED Indicators
Controls on PC Board
MultiModemBL User Guide
Installation and Connection
What is in Your Modem Package?
Unpacking MT2834BL shown
Installation Procedure
Installation
Safety Warnings
MultiModemBL/BLI Connections
Cabling Procedure MT1432BLK and MT2834BLK
MultiModemBLK Connections
Loading Trio DataFAX Software
Installation and Connection
Is Your Modem Ready for Use?
Software Configuration and Modem Basics
Serial Port Limitations
How Can You Identify Your Uart Type?
Software Configuration
Configuring Your Software
Configuring Software for Your Modem
16550 Uart and Windows
Other Parameters
Changing Default Parameters
PC Initialization Strings
Macintosh Initialization
Configuring Software for Your Computer
Configuring Software for the Remote System
Terminal Emulation
File Transfer Protocols
When to Disable Data Compression
Disabling Error Correction
AT &F S0=0 X4 &E14 M
Simple Operations
Answer/Originate Voice/Data Toggle Switch
Modem Basics
MultiModemBL User Guide
Manual Dial and Automatic Answer
Dialing/On-Line/Answering
Automatic Leased Line Restoral Operation
Manual Dial Backup Call Termination
Dial Backup and Leased Line Restoral
Manual Dial and Automatic Answer
Dial-Up Operation
Manual Call Origination
Automatic Answering
Manual Answering
Call Termination
Abort Timer
Handshaking Details
Command Mode
AT Command Editing
Command Mode
Functional Modes
Summary of AT Commands
Reliable Mode
Normal Mode
Auto-Reliable Mode
Flow Control Disabled
Passwords for Callback Phone Numbers
Enable/Disable Reading Line Probe From DSP during handshake
Display of Signal Strength Information
Callback Security Enable/Disable
Result Codes
Multi-Tech Result Codes Series
MultiModemBL User Guide Standard AT Result Codes Series
Continuous Redial not used in BLI/BLK a or
Dialing Commands Dialing Action Commands
Dial Command D
Dialing a Stored Number N
Pulse or Tone Dial P T
Dial Modifier Commands
Voice/Data Dialing $VD
Set Pulse Dial Ratios &P Not used in BLK
Automatic Pauses in Dialing
Return to Command Mode After Dial Command Execution
Reverse the Mode of Operation R
Long Space Disconnect Y
Calling Card Detect Tones $
Quiet Answer @
Number Linking NN
Phone Number Memory Commands
Storing Phone Numbers D...N
Listing Numbers Stored in Memory L
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 Enable/Disable and No Response Answer Q
Command Response Result Code Commands
Echo Command Mode Characters E
Result Codes Multi-Tech or Standard AT &Q
Result Codes Basic and Extended and Call Progress Selection
Guard Tones Not Used in BLI or BLK Models &G
Phone Line Conditioning Commands
Enable/Disable Trelis Coded Modulation #T
Bell/V.21 Tone Not Used in BLK Models B
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
Data Terminal Ready Control &D
7 RS-232C Interface Control Commands
Carrier Detect Control &C
CTS Control &R
DSR/CD Interaction Control &SF
Data Set Ready Control &S
CTS/RTS Interaction Control &RF
Auto-Reliable Mode &E1
Error Correction Commands
Normal Mode &E0
Reliable Mode &E2
Answer Mode
Mode Select #L
Originate Mode
Auto-Reliable Buffering $A
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
Modem-Initiated Flow Control
Hewlett-Packard ENQ/ACK Pacing &E9
Xon/Xoff Pass-Through &E7
Send Xon/Xoff Characters #X
Maximum Block Size &BS
Normal Mode Modem Flow Control On &E11
Terminal/Computer Initiated Pacing &E13
Parity Selection #P
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
Listing On-Line Diagnostics L8
Off Hook H
Exiting Command Mode, Going Back On-Line O
Line Probe Commands 2834 Series only
Force Answer Mode a
MultiModemBL User Guide
Registers
Escape Code Character
Number of Rings Until Modem Answers
Rings Which Have Occurred
Return Character
Backspace Character
Time for Carrier Abort Timer
Line Feed Character
Wait Time for Dial Tone
Carrier Detect Response Time
S10 Carrier Loss Disconnect Delay Time
S13 Remote Configuration Escape Character
S11 Tone Dialing Tone Spacing and Duration
S16 Callback Attempts
S15 Callback Time Delay
S19 Dial-Back Timer
S17 Changing Break Time
S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD
S26 Failed Password Attempts
S29 Local Inactivity Timer
S25 DTR Dropout Time
S36 Time Between DTR Inactive and Modem Off-Hook
S30 Inactivity Timer
S32 Time Elapse for Escape Sequence
S37 Time Between DTR Active and Modem On-Hook
S48 Program V.34bis Connect Speeds 2834 Series only
Examples of Reading Values
Reading and Assigning S-Register Values
Examples of Assigning Values
AT Command and S-Register Summary
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 Procedures
Remote Configuration Operation Procedures StepProcedure
Callback Security Enable/Disable
Remote Configuration and Callback Security AT Commands
Assign Passwords for Callback Phone Numbers #CBN
Change Login Password
Erase Callback Password
Erase Callback Phone Number #RDNxx
Remote Configuration/Callback Security S-Registers
MultiModemBL User Guide
Modem Testing
Introduction
Modem Testing
Local Analog Loopback Test/V.54 Loop
Digital Loopback Test/V.54 Loop 2 Local/Manual
100
Digital Loopback Test/V.54 Loop 2 Remote/Automatic
101
Back-to-Back Test
4A. Back-to-Back Test Cabling
Synchronous Mode Testing
Local Analog Loopback Test Synchronous Mode
Digital Loopback Test Local/Manual Synchronous Mode
Synchronous Mode Digital Loopback Test local/manual 104
Digital Loopback Test Remote/Automatic Synchronous Mode
Synchronous Mode Digital Loopback Test remote/automatic 105
MultiModemBL User Guide 106
DIP-Switch Settings
PC Board BL models 108
109
DIP-Switch Option Settings
DIP-Switch Settings
110
Switch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-UP
1432 Series
111
112
113
114
Speaker Volume Control
MultiModemBL User Guide Series
115
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
Tech Support
Service
Warranty, Service and Tech Support
Recording Modem Information
To Download a file
Multi-Tech BBS
To log on to the Multi-Tech BBS
Upgrading the MultiModem
Using FlashPro to Upgrade Modem Firmware
About the Multi-Tech Fax-Back Service
About Multi-Tech’s Internet Presence
122
About Ordering Accessories
SupplyNet Online Ordering Instructions
Appendixes
Modem Does Not Respond to Commands
Appendix a Troubleshooting
None of the LEDs Light When the Modem Is On
124
Appendix a Troubleshooting
125
Modem Dials But Cannot Make a Connection
126
File Transfer Is Slower Than It Should Be
Modem Cannot Connect When Answering
Modem Disconnects While On-line
127
128
Am Losing Data
Am Getting Garbage Characters on the Monitor
Appendix B Ascii Conversion Chart
129
Tone Dial Frequencies
Appendix C Dial Pulse and Tone-Dial Frequencies
Dial Pulses
130
$An
Appendix D AT Command Summary
Command Values Description
#An
CD n
BS n
$BA n
SN d
$FCn
$EBn
#Fn
$Fn
#Ln
$Hn
L10
$MBn
RFn
NdNe
$Rn
Sr=n
$SPn
$SBn
SFn
#Tn
137
#Xn
+++ATCR
Callback Security/Remote Configuration Command Summary
Password Command Summary
25bis Commands
140
Appendix E DIP-Switch Summary
Asynchronous Mode
141
Synchronous Mode
Appendix E DIP-Switch Summary
142
Appendix F S-Register Summary
S26
S24
S25
S29
Terse Digit Verbose Words Effect
Appendix G Result Code Summary
Appendix G Result Code Summary
145
146
25bis Operation
Delayed and Forbidden Numbers
Appendix H V.25bis Operation
Appendix H V.25bis Operation
148
25bis DIP-Switches
25bis Set-Up and Initialization
149
25bis Mode AT Commands
25bis Responses Result Codes
Change Serial Baud Rate CSP Command
25bis AT Commands
Enable/Disable V.25bis Mode $V Command
Dial Phone Number Provided CRN Command
Disregard or Connect to Incoming Calls DIC or CIC Command
Listing Delayed Phone Numbers RLD Command
Listing Forbidden Phone Number RLF Command
DTR Dialing $D Command
Switzerland
ITU V.25bis Country Specific Information
Italy
Austria
Singapore
Appendix H V.25bis Operation France
Belgium
153
Appendix I MultiModemBL Cables
Figure I-1. RS232 Cable IBM PC
Appendix J RS-232C Interface Specifications
Figure I-4. MAC Cable 155
Pin Designation Eia
Appendix J RS-232C Interface Specifications
Signal Function Assignment Circuit Source
156
Request To Send Pin 4, RTS CA
Signal Ground Pin 7, SG AB
Received Data Pin 3, RD BB
Clear To Send Pin 5, CTS CB
Transmit Clock Pin 15, TC DB
Ring Indicator Pin 22, RI CE
Test Voltage Pin 9
Receive Clock Pin 17, RC DD
159
Terminal Busy Out of Service Pin 25, OOS
External Transmit Clock Pin 24, XTC
160
European Directives User Guide Statement
EMC, Safety and Terminal Directive Compliance
Compliance with European Community Requirements
Appendix K Regulatory Information
162
International Modem Restrictions
New Zealand Telecom Warning Notice
FCC Regulations for Telephone Line Interconnection
163
FCC Part
Canadian Limitations Notice
Class a Statement
Industry Canada
Index
165
Functional Description of RS232C SIG
166
167
168
XON/XOFF