Synxcom SM9256D User manual

SM9256D and SM9234D Modems
User’s Guide
0049-2500-001 Rev B

The products and programs described in this User’s Guide are licensed products of Synxcom
Corporation. This User’s Guide contains proprietary information protected by copyright, and this
User’s Guide and all accompanying hardware and documentation are copyrighted.
Synxcom Corporation does not warrant that the hardware will work properly in all environments
and applications, and makes no warranty and representation, either implied or expressed, with
respect to the quality, performance, merchantability, or fitness for a particular purpose.
Synxcom Corporation will makes best efforts to update or keep current the information in this
User’s Guide, and reserves the right to make changes to this User’s Guide and/or product without
notice.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic
or mechanical, including photocopying, recording, or information storage and retrieval systems,
for any purpose other than the purchaser's personal use, without the express written permission of
Synxcom Corporation.
Copyright 2010 Synxcom Corporation.
1000 Dove Street, Suite 305
Newport Beach, California 92660
Tel: [phone]
Fax: [phone]
Web site: www.Synxcom.com

Page iii
FCC Requirements
This device complies with Part 15 Class A of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 Class A of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit other than the one to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
If none of these actions resolves the problem, consult your distributor or an experienced
radio/television technician for additional suggestions.
Additionally, Section 15.838, paragraph d), of the FCC Rules and Regulations states: “Where
special accessories, such as shielded cables, are required in order to meet FCC regulations,
shielded cables must be used with this equipment. Operation with non-approved equipment or
unshielded cables is likely to result in interference to radio and TV reception. The user is
cautioned that changes and modifications to this equipment without the approval of the
manufacturer could void the user’s authority to operate this equipment.
Department of Canada Statement
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numerique de la classe A respecte toutes les exigences du Reglement sur le materiel
brouilleur du Canada.

Page iv
FCC Part 68 Statement
This equipment complies with the Federal Communications Commission’s (FCC) Rules and Regulations
47 CFR Part 68 and the Administrative Council on Terminal Attachments (ACTA) adopted technical
criteria TIA/EIA/IS-968, Telecommunications – Telephone Terminal Equipment – Technical Requirements
for Connection of Terminal Equipment To the Telephone Network, July 2001. On the plastic enclosure of
this equipment is a label that contains the ACTA Registration number. You must, upon request, provide
this information to your telephone company.
This equipment uses USOCs RJ11 connector.
A telephone cord and modular plug compliant with TIA/EIA/IS-968 are provided with this equipment. This
equipment is designed to be connected to the telephone network or premises wiring using a compatible
modular jack, which is Part 68 compliant. See installation instructions for details.
The REN is useful to determine the quantity of devices you may connect to your telephone line and still
have all those devices ring when your telephone number is called. In most, but not all areas, the sum of the
REN's of all devices connected to one line should not exceed five (5.0). To be certain of the number of
devices you may connect to your line, as determined by the REN, you should contact your local telephone
company to determine the maximum REN for your calling area. (NOTE: REN are associated with loop-
start and ground-start ports. Do not use for E&M or digital ports).
If your telephone equipment causes harm to the telephone network, the Telephone Company may
discontinue your service temporarily. If possible, they will notify you in advance. But if advance notice is
not practical, you will be notified as soon as possible. You will be informed of your right to file a complaint
with the FCC.
Your telephone company may make changes in its facilities, equipment, operations or procedures that could
affect the proper functioning of your equipment. If they do, you will be notified in advance to give you an
opportunity to maintain uninterrupted telephone service.
If you experience trouble with this telephone equipment, please contact Synxcom Corporation, 1000 Dove
Street, Newport Beach, CA 92660, Phone [phone] for information on obtaining service or repairs.
The telephone company may ask that you disconnect this equipment from the network until the problem has
been corrected or until you are sure that the equipment is not malfunctioning.
Please note: No user serviceable parts contains in this equipment.
This equipment may not be used on coin service provided by the telephone company. Connection to party
lines is subject to state tariffs.
The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or
other electronic device, including fax machines, to send any message unless such message clearly contains
in a margin at the top or bottom of each transmitted page or on the first page of the Transmission, the date
and time it is sent and an identification of the business or other entity, or other individual sending the
message and the telephone number of the sending machine or such business, other entity, or individual.
(The telephone number provided may not be a 900 number or any other number for which charges exceeds

Page v
local or long-distance transmission charges.)

Page vii
Contents
FEATURES........................................................................................................................................................15
MODEL NUMBERS AND ORDER INFORMATION.....................................................................................16
UNPACKING YOUR MODEM........................................................................................................................19
ADDITIONAL ITEMS YOU NEED.................................................................................................................19
SETTING-UP AND INSTALLING YOUR MODEM......................................................................................19
INSTALLING THE DRIVER ...........................................................................................................................22
WINDOWS XP...................................................................................................................................................22
WINDOWS 2000................................................................................................................................................22
LEDS ..................................................................................................................................................................23
MODEM OPERATION.....................................................................................................................................23
SERIAL PORT DATA SPEED ................................................................................................................................23
AUTO-ANSWER MODE ......................................................................................................................................23
CALL ANSWER TESTING..............................................................................................................................25
CALL ORIGINATING TESTING....................................................................................................................25
STORING TELEPHONE NUMBERS..............................................................................................................29
CONFIGURING THE $DL TIMEOUT............................................................................................................30
ENABLING THE AUTO-CONNECT FEATURE ...........................................................................................30
VIEWING THE CURRENT $DL SETTING....................................................................................................30
SYNTAX AND PROCEDURES ........................................................................................................................31
ALPHABET........................................................................................................................................................31
DTE COMMANDS LINES....................................................................................................................................31
Command Line General Format..................................................................................................................32
Command Line Editing ...............................................................................................................................32
Command Line Echo...................................................................................................................................32
Repeating a Command Line........................................................................................................................33
Types of DTE Commands............................................................................................................................33
BASIC SYNTAX COMMANDS ..............................................................................................................................33
Basic Syntax Command Format ..................................................................................................................33
S Parameters...............................................................................................................................................34
EXTENDED SYNTAX COMMANDS .......................................................................................................................35
Command Naming Rules.............................................................................................................................35
Values.........................................................................................................................................................35
Action Commands.......................................................................................................................................37
Parameter Commands.................................................................................................................................38

Page viii
Additional Syntax Rules..............................................................................................................................40
ISSUING COMMANDS.........................................................................................................................................40
EXECUTING COMMANDS ...................................................................................................................................40
Aborting Commands ...................................................................................................................................41
Handling of Invalid Numbers and S-Parameter Values................................................................................41
MODEM RESPONSES..........................................................................................................................................41
Responses...................................................................................................................................................42
Extended Syntax Result Codes ....................................................................................................................43
+<name>: <compound_value>Information Text Formats for Test Commands...........................................45
DATA COMMAND SET...................................................................................................................................47
COMMAND GUIDELINES ....................................................................................................................................47
Escape Code Sequence ...............................................................................................................................47
DATA COMMANDS ............................................................................................................................................47
Generic Modem Control .............................................................................................................................47
Z - Soft Reset and Restore Profile ...............................................................................................................47
+FCLASS - Select Active Service Class ......................................................................................................48
+VCID - Caller ID (CID)............................................................................................................................49
+VRID - Report Retrieved Caller ID (CID).................................................................................................49
\N - Operating Mode...................................................................................................................................50
I - Identification..........................................................................................................................................50
+GMI - Request Manufacturer Identification..............................................................................................51
+GMI9 - Request Conexant Identification...................................................................................................51
+GMM - Request Model Identification .......................................................................................................52
+GMR - Request Revision Identification.....................................................................................................52
+GCAP - Request Complete Capabilities List.............................................................................................52
+GCI - Country of Installation....................................................................................................................52
&F - Restore Factory Configuration (Profile).............................................................................................53
&T - Local Analog Loopback Test...............................................................................................................54
&Y - Designate a Default Reset Profile.......................................................................................................54
&W - Store Current Configuration..............................................................................................................54
&Zn=x - Store Telephone Number ..............................................................................................................54
%7 - Plug and Play Serial Number..............................................................................................................55
%8 - Plug and Play Vendor ID and Product Number...................................................................................55
**- Load Flash Memory..............................................................................................................................55
DTE-Modem Interface Commands..............................................................................................................58
E - Command Echo.....................................................................................................................................58
Q - Quiet Results Codes Control.................................................................................................................58
V - Result Code Form..................................................................................................................................58
W - Connect Message Control.....................................................................................................................59
X - Extended Result Codes..........................................................................................................................59
&C - RLSD (DCD) Option ..........................................................................................................................63
&D - DTR Option........................................................................................................................................64
&K - Flow Control......................................................................................................................................65
&M - Asynchronous/Synchronous Mode Selection.......................................................................................65
&Q - Sync/Async Mode...............................................................................................................................66
&R - RTS/CTS Option.................................................................................................................................67
&S - DSR Override .....................................................................................................................................67
&X - Select Synchronous Clock Source.......................................................................................................67
+IPR - Fixed DTE Rate ..............................................................................................................................68
+IFC - DTE-Modem Local Flow Control....................................................................................................69
+ILRR - DTE-Modem Local Rate Reporting...............................................................................................69
Call Control................................................................................................................................................70
T - Set Tone Dial Default.....................................................................................................................................72

Page ix
P - Set Pulse Dial Default...........................................................................................................................72
A - Answer..................................................................................................................................................73
H - Disconnect (Hang-Up)..........................................................................................................................73
O - Return to On-Line Data Mode...............................................................................................................74
L - Speaker Volume.....................................................................................................................................74
M - Speaker Control ...................................................................................................................................74
&G - Select Guard Tone..............................................................................................................................75
&P - Select Pulse Dial Make/Break Ratio...................................................................................................75
&V - Display Current Configuration and Stored Profiles............................................................................75
&V1 - Display Last Connection Statistics....................................................................................................76
\V - Single Line Connect Message Enable...................................................................................................77
%L - Report Line Signal Level ....................................................................................................................78
%Q - Report Line Signal Quality.................................................................................................................78
*B - Display Blacklisted Numbers...............................................................................................................79
–PPD= - Extension Pickup Notification through 16550 UART....................................................................79
–STE= - Set Telephony Extension...............................................................................................................79
Modulation Control Commands..................................................................................................................86
+MS - Modulation Selection.......................................................................................................................86
+MR - Modulation Reporting Control.........................................................................................................89
+MCR: Report Syntax.................................................................................................................................89
+MRR: Report Syntax.................................................................................................................................90
%E - Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall...........................................90
%U - Select µ-Law or A-Law Codec Type....................................................................................................91
B - CCITT or Bell .......................................................................................................................................91
Error Control Command.............................................................................................................................92
+ES - Error Control and Synchronous Mode Selection...............................................................................92
+EB - Break Handling in Error Control Operation.....................................................................................93
+ESR - Selective Repeat.............................................................................................................................94
+EFCS - 32-bit Frame Check Sequence......................................................................................................94
+ER - Error Control Reporting...................................................................................................................94
+ER: <value>............................................................................................................................................95
+ER: <type>..............................................................................................................................................95
+ETBM - Call Termination Buffer Management.........................................................................................95
\B - Transmit Break to Remote....................................................................................................................96
\K - Break Control......................................................................................................................................96
-K - MNP Extended Services.......................................................................................................................97
3.2.6 Data Compression Commands.......................................................................................................98
+DS - Data Compression............................................................................................................................98
+DS44 - V.44 Compression Select ..............................................................................................................98
+DR - Data Compression Reporting......................................................................................................... 100
+DR: <type> Intermediate Result Code ...................................................................................................100
%C - Enable/Disable Data Compression................................................................................................... 101
V.8/V.8bis Commands...............................................................................................................................101
+A8E - V.8 and V.8bis Operation Controls...............................................................................................101
+A8I: - CI Signal Indication..................................................................................................................... 102
Synchronous Access Mode Commands...................................................................................................... 103
+ESA - Configure Synchronous Access Submode......................................................................................103
+H - Enable/Disable RPI..........................................................................................................................104
+ITF - Transmit Flow Control Thresholds.................................................................................................105
Diagnostic Commands..............................................................................................................................106
#UD – Last Call Status Report..................................................................................................................106
Compatibility Commands.......................................................................................................................... 115
&L - Leased Line Operation...................................................................................................................... 115
)M - Enable Cellular Power Level Adjustment ..........................................................................................115

Page x
@M - Initial Cellular Power Level Setting................................................................................................115
:E - Compromise Equalizer Enable Command ..........................................................................................116
FastConnect Commands............................................................................................................................116
$F – FastConnect Control.........................................................................................................................116
V.92 +P and –Q Commands...................................................................................................................... 117
+PCW - Call Waiting Enable.................................................................................................................... 117
+PMH - Modem-on-Hold Enable..............................................................................................................117
+PMHT – Modem-on-Hold Timer............................................................................................................. 118
+PMHR - Initiate Modem-on-Hold...........................................................................................................118
+PIG - PCM Upstream Ignore..................................................................................................................119
+PMHF - V.92 Modem-on-Hold Hook Flash ............................................................................................119
+PQC - V.92 Phase 1 and Phase 2 Control...............................................................................................120
+PSS - Use Short Sequence.......................................................................................................................120
-QCPC - Force Full Startup Procedure Next Connection..........................................................................121
-QCPS - Enable Quick Connect Profile Save ............................................................................................121
S-PARAMETERS ..............................................................................................................................................122
FACTORY DEFAULTS............................................................................................................................. 123
S-PARAMETER DEFINITIONS................................................................................................................125
S0 - Number of Rings to Auto-Answer .......................................................................................................125
S1 - Ring Counter..................................................................................................................................... 125
S2 - Escape Character..............................................................................................................................125
S3 - Carriage Return Character................................................................................................................125
S4 - Line Feed Character..........................................................................................................................125
S5 - Backspace Character.........................................................................................................................126
S6 - Wait Time before Blind Dialing or for Dial Tone...............................................................................126
S7 - Wait Time for Carrier, Silence, or Dial Tone.....................................................................................126
S8 - Pause Time For Dial Delay................................................................................................................127
S9 - Carrier Detect Response Time ...........................................................................................................127
S10 - Lost Carrier To Hang Up Delay.......................................................................................................127
S11 - DTMF Tone Duration......................................................................................................................128
S12 - Escape Prompt Delay (EPD)............................................................................................................128
S14 - General Bit Mapped Options Status................................................................................................. 128
S16 - Test Mode Bit Mapped Options Status..............................................................................................129
S19 – Reserved .........................................................................................................................................129
S20 – Reserved .........................................................................................................................................129
S21 - V.24/General Bit Mapped Options Status......................................................................................... 129
S22 - Speaker/Results Bit Mapped Options Status.....................................................................................130
S23 - General Bit Mapped Options Status................................................................................................. 130
S24 - Sleep Inactivity Timer......................................................................................................................130
S25 - Delay To DTR Off............................................................................................................................130
S26 - RTS to CTS Delay............................................................................................................................131
S27 - Bit Mapped Options Status...............................................................................................................131
S28 - Bit Mapped Options Status...............................................................................................................131
S29 - Flash Dial Modifier Time................................................................................................................. 132
S30 - Disconnect Inactivity Timer.............................................................................................................132
S31 - Bit Mapped Options Status...............................................................................................................132
S36 - LAPM Failure Control.....................................................................................................................133
S38 – Delay Before Forced Hang up.........................................................................................................133
S39 - Flow Control Bit Mapped Options Status.........................................................................................133
S40 - General Bit Mapped Options Status................................................................................................. 134
S41 - General Bit Mapped Options Status................................................................................................. 134
S46 - Data Compression Control...............................................................................................................134
S48 - V.42 Negotiation Control.................................................................................................................135
S48=7 Enable negotiation. (Default.).................................................................................................135

Page xi
S86 - Call Failure Reason Code................................................................................................................135
S86=11 No sync information from the remote modem.......................................................................... 135
S86=26 Remote hangup detected.........................................................................................................136
S91 - PSTN Transmit Attenuation Level ....................................................................................................137
S92 - Fax Transmit Attenuation Level.......................................................................................................137
S95 - Extended Result Codes Control........................................................................................................137
S210 – V.34 Symbol Rates.........................................................................................................................138
CELLULAR COMMANDS................................................................................................................................... 138
Cellular Phone Drivers.............................................................................................................................139
Cellular Commands.................................................................................................................................. 139
^C2 - Download Cellular Phone Driver ....................................................................................................139
^I - Identify Cellular Phone Driver ...........................................................................................................139
^T6 - Indicate Status of Cellular Phone.....................................................................................................140
Operation .................................................................................................................................................140
RESULT CODES...............................................................................................................................................144
FAX CLASS 1 AND FAX CLASS 1.0 COMMANDS.....................................................................................149
FAX I/O PROCESSING ......................................................................................................................................149
DTE-to-Modem Transmit Data Stream......................................................................................................149
Modem-to-DTE Receive Data Stream .......................................................................................................149
Fax Mode Selection ..................................................................................................................................149
Fax Origination........................................................................................................................................150
Fax Answering..........................................................................................................................................151
Fax Control Transmission.........................................................................................................................151
Fax Control Reception..............................................................................................................................151
Fax Data Transmission.............................................................................................................................153
Fax Data Reception.................................................................................................................................. 153
COMMANDS AND PARAMETERS........................................................................................................................ 154
Mode Entry Commands.............................................................................................................................154
+FCLASS=1 - Select Facsimile Class 1 Mode ..........................................................................................154
+FCLASS=1.0 - Select Facsimile Class 1.0 Mode.....................................................................................154
Mode Commands ......................................................................................................................................155
+FAA - Auto Answer Enable..................................................................................................................... 155
+FAE - Auto Answer Enable..................................................................................................................... 155
+FTS - Transmit Silence...........................................................................................................................155
+FRS - Receive Silence.............................................................................................................................156
+FTM – Transmit Facsimile .....................................................................................................................156
+FRM - Receive Facsimile ....................................................................................................................... 158
+FTH - Transmit Data with HDLC Framing.............................................................................................158
+FRH - Receive Data with HDLC Framing .............................................................................................. 159
Service Class 1 Parameters.......................................................................................................................160
+FAR - Adaptive Reception Control ......................................................................................................... 160
+FCL - Carrier Loss Timeout ...................................................................................................................160
+FDD - Double Escape Character Replacement.......................................................................................161
+FIT - DTE Inactivity Timeout .................................................................................................................161
+FPR - Fixed DTE Rate ...........................................................................................................................162
+FMI? - Request Manufacturer Identification ..........................................................................................163
+FMM? - Request Model Identification....................................................................................................163
+FMR? - Request Revision Identification .................................................................................................163
+FLO - Flow Control................................................................................................................................163
EXAMPLES......................................................................................................................................................164
FAX CLASS 2 COMMANDS..........................................................................................................................167
COMMAND AND SYNTAX GUIDELINES..............................................................................................................168

Page xii
Mode Entry Commands.............................................................................................................................168
+FCLASS=2 - Select Facsimile Class 2 Mode ..........................................................................................168
DTE Commands........................................................................................................................................168
Serial Port Speed and Flow Control..........................................................................................................170
Auto Answer.............................................................................................................................................. 171
Identification of T.30 Options ................................................................................................................... 171
Session Status Reporting...........................................................................................................................171
Procedure Interrupt Negotiation...............................................................................................................172
SERVICE CLASS 2IDENTIFICATION AND SELECTION..........................................................................................172
+FMFR? - Request Manufacturer Identification.......................................................................................172
+FMDL? - Identify Product Model ...........................................................................................................172
+FREV? - Identify Product Revision.........................................................................................................172
SERVICE CLASS 2ACTION COMMANDS ............................................................................................................173
ATD - Originate a Call ............................................................................................................................. 173
ATA - Answer a Call ................................................................................................................................. 174
+FDT - Data Transmission....................................................................................................................... 175
+FET - Transmit Page Punctuation ..........................................................................................................178
+FDR - Begin or Continue Phase C Receive Data....................................................................................179
+FK - Session Termination.......................................................................................................................181
+FCIG - Set Polling ID.............................................................................................................................181
+FLPL - Indicate a Document for Polling.................................................................................................181
+FSPL - Enable Polling............................................................................................................................182
SERVICE CLASS 2DCE RESPONSES..................................................................................................................183
+FCON - Facsimile Connection Response................................................................................................183
+FDCS: - Report Current Session Capabilities.........................................................................................183
+FDIS: - Report Remote Station Capabilities...........................................................................................183
+FCFR - Indicate Confirmation to Receive...............................................................................................184
+FTSI: - Report the Transmit Station ID................................................................................................... 184
+FCSI: - Report the Called Station ID...................................................................................................... 184
+FPTS: - Receive Page Transfer Status.................................................................................................... 184
+FET: - Post Page Message Response......................................................................................................185
+FPTS: - Transmit Page Transfer Status...................................................................................................185
+FHNG: - Call Termination with Status ................................................................................................... 185
+FCIG: - Report the Polled Station ID.....................................................................................................185
+FDTC: - Report the Polled Station Capabilities......................................................................................186
+FPOLL - Indicate Polling Request.......................................................................................................... 186
SERVICE CLASS 2PARAMETERS.......................................................................................................................186
+FDCC - DCE Capabilities Parameters...................................................................................................186
+FDIS - Current Sessions Capabilities Parameters...................................................................................186
+FDCS - Current Session Results Parameters........................................................................................... 187
+FLID= - Local ID String ........................................................................................................................188
+FCR - Capability to Receive................................................................................................................... 188
+FPTS= - Page Transfer Status................................................................................................................188
+FCQ - Copy Quality Checking................................................................................................................190
+FPHCTO - DTE Phase C Response Time-out .........................................................................................190
+FAXERR - T.30 Session Error Report.....................................................................................................190
+FBOR - Data Bit Order..........................................................................................................................190
+FAA - Answer Parameter........................................................................................................................191
+FBUF? - Buffer Size...............................................................................................................................191
EXAMPLE SESSIONS ........................................................................................................................................192
VOICE COMMANDS......................................................................................................................................194
VOICE COMMANDS OVERVIEW........................................................................................................................ 194
<DLE> Shielded Event Codes Sent to the DTE..................................................................................................195

Page xiii
<DLE> Shielded Codes Sent to the Modem (DCE)................................................................................... 196
VOICE COMMANDS .........................................................................................................................................196
Configuration Commands ......................................................................................................................... 196
+FCLASS=8 - Select Voice Mode.............................................................................................................196
+VNH - Automatic Hang-up Control.........................................................................................................196
Voice Commands ...................................................................................................................................... 197
+VIP - Voice Initialize All Parameters...................................................................................................... 197
+VRX - Start Modem Receive (Record).....................................................................................................197
+VTS - Send Voice Tone(s) .......................................................................................................................199
+VTX - Start Modem Transmit (Playback) ................................................................................................ 201
+VGR - Voice Gain Receive (Record Gain)..............................................................................................201
+VGT - Voice Gain Transmit (Playback Volume)......................................................................................202
+VIT - Voice Inactivity Timer (DTE/Modem)............................................................................................202
+VLS - Analog Source/Destination Selection............................................................................................202
+VRA - Ringback Goes Away Timer..........................................................................................................206
+VRN - Ringback Never Appeared Timer .................................................................................................206
+VSD - Silence Detection (Quiet and Silence) ..........................................................................................207
+VSM - Compression Method Selection.................................................................................................... 208
+VTD - Beep Tone Duration Timer...........................................................................................................209
+VDR - Distinctive Ring...........................................................................................................................209
+VDT - Control Tone Cadence Reporting................................................................................................. 210
+VPR - Select DTE/Modem Interface Rate (Turn Off Autobaud)...............................................................210
Speakerphone Commands .........................................................................................................................211
+VSP - Speakerphone ON/OFF.................................................................................................................211
+VDX - Speakerphone Duplex Mode ........................................................................................................211
+VGM - Microphone Gain........................................................................................................................212
+VGS - Speaker Gain ...............................................................................................................................212

Page 15
Chapter 1
Introduction
he Synxcom SM9256D and SM9234D are industrial grade standalone data/fax modem that
deliver outstanding performance, transmitting data at the highest rates available over the
public switched telephone networks (PSTN) today. The SM9256D, supports V.92 & V34
standards, offers asynchronous line speeds of up to 56kbps. The SM9234D supports V.34 and
line speeds of up to 33.6kbps. Both modems incorporate the latest data compression and error
correction standards and are capable of providing data throughput up to 230.4 kbps. The
SM9256D and SM9234D incorporate advanced technology that enhances operation on less-than-
ideal transmission lines. Both modems also offer optional security features ideal for personal and
corporate applications. The SM9256D easily handles tasks such as remote LAN access,
telecommuting, remote file transfer, access to the Internet, and any other applications that require
fast, reliable transmission speeds.
Features
2-wire unconditioned dial-up telephone line
Build with industrial grade components to meet and operate under harsh environment
ITU-V.92 capabilities, (model SM9256D)
Compatible with ITU V.34, V.32bis, V.32, V.29, V.27ter, V.23, V.22bis, V.21, and V.17
Maximum throughput may be up to 230.4KBPS using data compression
Supports industry-standard AT command set
Supports V.42 and MNP 2-4 error correction and V.42bis and MNP5 data compression
Support RS-232 and RS-485 serial interface (user selectable)
Support DC or battery powered operation by an isolated 10 to 60 VDC power supply
Optional mounting kits for DIN rail mounting and wall/panel mounting
T

Introduction
Page 16
Model Numbers and Order Information
Model SM9256D:
V92/V34/V32bis/V32/V22bis (56K)
Stand-alone with AC power module
90 to 264 VAC or 100-400 VDC
Model SM9256D-DC:
V92/56K/V34/V32bis/V32/V22bis
Stand-alone, DC power, 10-48 VDC
Model SM9234D:
V34/V32bis/V32/V22bis (33.6K)
Stand-alone with AC power module
90 to 264 VAC or 100-400 VDC
Model SM9234D-DC:
V34/V32bis/V32/V22bis (33.6K)
Stand-alone, DC power, 10-48 VDC
Mounting kit Accessories
EN2-KIT-DIN:
DIN Rail Mounting Kit for S/A units
EN2-KIT-WMB:
Wall-Panel mounting kit for S/A units

Introduction
Page 17

Page 19
Chapter 2
Installation
Unpacking Your Modem
Your SM9256D/SM9234D modem package includes the following items:
One Synxcom SM9256D or SM9234D standalone modem
An RJ-11 telephone cable
An 115/230VAC AC to DC power supply converter (for SM9256D and SM9234D)
A DC power cable (for the SM9256D-DC and SM9234D-DC versions)
A CD containing the modem User’s Guide
Additional Items You Need
To install the SM9256D/SM9234D modems, you need the following additional items:
The power source that matches the model you order, AC power module or 10-48VDC.
A standard wall-mounted telephone jack (RJ-11C) located within 6 feet of your computer
For RS-232 interface, a shielded serial cable with a 9-pin male connector for connecting to
your SM9256D/SM9234D. The connector on the other end of the cable should match the
requirements of your computer or Data Terminal Equipment (DTE).
For RS-485/RS-422 interface, a RJ-11 serial cable connected to your RTU or DTE is required
Note: If you use fax software, be sure it supports Class 1 fax operation.
Setting-up and Installing Your Modem
Configuring Your Modem’s DTE/RTU Interface.

Installation
Page 20
Your SM9256D and SM9234D support RTU/DTE with either RS-232 or RS-485 interface for
communications. The modem is set to use the RS-232 interface (DB-9 connector) as the default
interface from the factory. If you do not use RS-485/RS-422 option of the modem, skip this
section and continue the installation with the “Installing Your Modem” section below.
To configure the modem for RS-485/RS-422 interface, you will need to connect your DTE/RTU
to the RJ-11 connector as shown in Fig. 1 below and set up the DTE configuration DIP switches
(SW1) provided on the modem PCB as indicated in the table below.
DTE/RTU Interface SW-1 SW-2 SW-3 SW-4 SW-5 SW-6
RS-232 (DB-9) (default) OFF OFF OFF OFF OFF OFF
RS-485 4-wire full duplex ON ON ON OFF OFF ON
RS-485 2-wire half duplex OFF ON OFF ON ON OFF
Note: Use a sharp pin to push and slide the DIP switches to the side labeled “ON” on the DIP
switch is equivalent to CLOSE the switch.
Figure 1 Configuration DIP Switch