AGM DLM User manual

Dial-Up / Leased-Line Modem
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+
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CD
CTS
RTS
DTR
DSR
RI
PHONE
LINE
RX TX
DLM
AGM Electronics, Inc – Dial-Up / Leased-Line Modem, Series ( ) 5019-1
Manual Rev A
User Manual

Dial-Up / Leased-Line Modem

Dialup / Leased Line Modem
CONTENTS
INTRODUCTION........................................................................................................................................................... 1
Overview..................................................................................................................................................................2
Theory of Operation and Construction ..............................................................................................................2
General Specifications..........................................................................................................................................4
HARDWARE INSTALLATION..................................................................................................................................... 5
TELEPHONE CONNECTION ................................................................................................................................... 5
LEASED-LINE CONNECTION ................................................................................................................................. 5
POWER CONNECTION ............................................................................................................................................ 5
CONNECTING TO A PERSONAL COMPUTER..................................................................................................... 6
CONNECTING TO AGM DATA HANDLER (DH) RS232.......................................................................................7
CONNECTING TO AGM INTEGRATED CONTROL STATION (ICS) .................................................................. 7
CONNECTING TO AGM UNIVERSAL WEB STATION (UWS) ............................................................................ 8
CONNECTING TO A 3RD PARTY PLC.....................................................................................................................8
GETTING STARTED .................................................................................................................................................... 9
SETTING DLM FOR DIAL-UP OPERATION........................................................................................................... 9
SETTING DLM FOR LEASED-LINE OPERATION...............................................................................................11
CONFIGURATION......................................................................................................................................................13
ENTERING COMMAND MODE..............................................................................................................................13
COMMON COMMANDS..........................................................................................................................................14
Answer (A).............................................................................................................................................................14
Dial (D)....................................................................................................................................................................14
Echo Character (E)...............................................................................................................................................14
Hang Up (H0).........................................................................................................................................................14
Monitor Speaker (M) ............................................................................................................................................14
Result Codes Enable (Q).....................................................................................................................................14
Result Codes Format (V).....................................................................................................................................14
Carrier Detect (&C)...............................................................................................................................................14
Data Terminal Ready DTR Control (&D)...........................................................................................................15
Load Factory Settings (&F0) ..............................................................................................................................15
Flow Control (&K).................................................................................................................................................15
Leased-Line (&L)..................................................................................................................................................15
NOTE: For Leased-Line operation one DLM must be set for Originate and the other must be set for
Answer. 15
DSR Control (&S) .................................................................................................................................................15
Display Configuration Settings (&V).................................................................................................................15
Save Changes (&W0)...........................................................................................................................................15
AT Command Control (%DC).............................................................................................................................15
Inactivity Timer (\T) ..............................................................................................................................................16
Data Format ($EB) and (#P)................................................................................................................................16
Serial Port Baud Rate ($SB) ...............................................................................................................................16
MODULATION COMMANDS..................................................................................................................................17
Modulation Selection (+MS=).............................................................................................................................17
Display Modulation Selection (+MS?)...............................................................................................................17
Error Control (&Q)................................................................................................................................................17
S REGISTERS..........................................................................................................................................................18

Dialup / Leased Line Modem
TECHNICAL SUPPORT.............................................................................................................................................19
DIAGNOSTICS AND TROUBLE SHOOTING..........................................................................................................20
INDICATOR LIGHTS................................................................................................................................................20
TROUBLESHOOTING HINTS.................................................................................................................................20
Loss of Connection / Failure to Connect..........................................................................................................20
Failure to Disconnect on Dial-Up Connections...............................................................................................23
Failure to Disconnect on Loss of Carrier .........................................................................................................24
DLM Tries to Connect Immediately on a Dial-Up Phone Line.......................................................................24
APPENDIX A................................................................................................................................................................25
WIRING AND SIMPLIFIED DIAGRAM...................................................................................................................25

Introduction
Dialup / Leased Line Modem
1
Introduction
Thank you for purchasing the AGM Dial-Up / Leased-Line Modem (DLM). The AGM Dial-Up /
Leased-Line Modem provide a variety of cost effective data communication possibilities. This
manual covers installation and setup of the more commonly used configurations.
Pin Description
1 Power (+)
2 Power (-)
Monitoring Speaker
Phone Line Connection
(RJ11)
Screw Terminal Connections
RS232 Connector (Female)
Carrier Detect Indicator
CTS Indicator
RTS Indicator
DTR Indicator
DSR Indicator
Ring Indicator

Introduction
Dialup / Leased Line Modem 2
Overview
The AGM AUX/DIN 5019-1 DLM is a low cost V.92 modem which supports Leased-Line as
well as Dial-Up connections. The DLM complies with FCC and other international regulations
for connection to public telephone systems. The DLM may also be used over a dry metallic
pair of lines.
The DLM is for use with RS232 system.
The standard DLM communicates using the V.92 modem standard and is backwards
compatible with earlier modem standards. It is configured using the AT command set
common with most commercial Dial-Up modems found in desktop and laptop computers.
The default configuration of the DLM will automatically detect the correct data
communications rate however the DLM can be set to use a specific rate such as 9600 bps if
required. Fixing the communications data rate can eliminate some connection problems
when communication conditions are not optimal.
Theory of Operation and Construction
The heart of the DLM is an industrial hardened V.92 modem that integrates most of the
common error correcting and data compression algorithms found in many commercial
modems such as those found in your desktop or laptop computer. Unlike the modem found
in your desktop, the DLM also incorporates a Leased-Line feature which allows the DLM to
be used over a Leased-Line from the phone company or via a dry metallic pair of wires.
The DLM may be used with any protocol that uses 7 or 8 bit asynchronous data. This
includes but is not limited to: ASCII Modbus, RTU Modbus, DF1, or DNP3. You do not need
to own AGM Electronics Inc. equipment to use the DLM.
The DLM is configured by using a computer and any terminal emulation software such as
AGM’s SCADA, AGM’s Communicator or Hyper Terminal which is packaged with Microsoft
Windows. The DLM may be configured in the field using a laptop computer and RS232
cable.
When used for a Dial-Up connection the DLM acts like any external Dial-Up modem that you
may have connected to your computer. When the DLM receives a dial command “EG
ATD123-4567” the DLM will go off hook, check for a dial tone and then dial the number.
When the receiving DLM or modem detects a ring on the phone line, the modem answers
then emits a tone. When the originating DLM detects the tone from the answering modem
the two modems will then attempt to negotiate a connection rate. Once the data rate has
been negotiated the CD light will be turned on and if enabled a connect message will be sent
to each of the connected devices.
When used in the Dial-Up configuration the DLM is compatible with most other commercial
modems that adhere to one of the supported standards.

Introduction
Dialup / Leased Line Modem
3
When used with a Leased-Line connection one DLM must be set up to “originate” and the
other to “answer”. After approximately 30 seconds after power up one DLM will start emitting
a tone and the other DLM will listen for the tone. Once the tone is detected the two DLM’s will
negotiate a connection as in a Dial-Up connection.
NOTE: In Leased-Line mode the AGM Electronics DLM is only compatible with another
AGM Electronics DLM. Connection to other Leased-Line modems is not
supported. Also, multi-drop connections are not supported.
When you order your DLM indicate how you would like to have the DLM configured. AGM
Electronics Inc. will configure your DLM at the factory free of charge.
The hermetically sealed assembly minimizes installation costs.

Introduction
Dialup / Leased Line Modem 4
General Specifications
Connections – 1 RS232C; Power; RJ-11 Telephone Company
Baud Rate – 0 – 300; 1200; 2400; 4800; 7200; 9600, 12,000; 14,400; 19,200; 21,600;
24,000; 26,400; 28,800; 31,200; 33,600 bps
Data Compatibility – V.92; V.34 enhanced; V.34; V.32bis; V.32; V.22bis; V.22; Bell 212A and
103/113; V.21 and V.23
Data Compression – ITU-T V.44; V.42.bis; MNP 5
Error Correction – V.42
Status Indicators – 8
Operating Temperature Range, -20/80 deg C
Adjustments – Operator configurable locally from a PC
Power – 11/30 VDC +/- 10%, nominal 2.5 Watts
Physical – 3 X 1.4 X 3.5 (DIN), 3 X 1.4 X 2.7 (AUX)
Safety Certifications – UL60950; cUL60950; EN60950; IEC6090; ACA TS001 / AS 3260
EMC Certifications – FCC Part 15; Canadian EMC; EN 55022; EN 55024; GB4943; GB9254
Registration No – AU7USA-25814-M5-E
Ringer Equivalence – 0.3B

Hardware Installation
Dialup / Leased Line Modem
5
Hardware Installation
The DLM is available pre-configured to your application. When pre-configured, the DLM is
ready for use and you only need to connect your equipment. If not pre-configured or if you
need to modify the configuration you will need to connect the DLM to a computer containing a
RS232 serial port and terminal emulation program. Hyper Terminal is available on any
Microsoft Windows 95/98/NT/2000/XP system.
Telephone Connection
The telephone line connector on the DLM is a standard RJ-11 telephone jack. Use a
standard telephone modular cable to connect between the DLM and the RJ-11 telephone
jack supplied by the telephone company.
NOTE: The DLM should only be plugged into a standard telephone line or dry metallic pair
of lines. Some digital telephone and other systems may also use a RJ-11 jack for
connecting their digital phones. The DLM is not compatible with these types of
systems and plugging the DLM into one of these systems may result in damage to
the DLM and phone system.
Leased-Line Connection
The DLM uses the same RJ-11 jack for connecting Leased-Lines as well as standard Dial-Up
lines. The DLM will operate with a dry metallic pair of lines. Connect the dry pair to a
modular RJ-11 plug or jack then plug the dry pair into the DLM’s RJ-11 jack. Use the two
center connections of the RJ-11. The phone lines used by the DLM are not polarized.
Power Connection
The DLM will operate from either a 12 VDC or 24 VDC supply system that is capable of
supplying 300 mA. Connect the positive lead of your power supply to pin 1 of the connector
and the negative lead to pin 2 of the connector. Should you ever be required to remove the
DLM you may un-plug the connector by lifting straight up from the body of the DLM. You do
not need to remove the power wires once installed.
When power is applied the “DSR” light should turn on immediately followed by the “CTS” no
more than one second later. Until you connect up your computer, PLC or other RS232
device these are the only two lights that will be on.

Hardware Installation
Dialup / Leased Line Modem 6
Connecting to a Personal Computer
Use the following procedure to connect the DLM to your computer for either configuration
changes or use.
You will need a “straight-through” cable to connect to the DLM. This cable should have a 9 or
25 pin female connector on one end to match the connector on you computer and a 9 pin
male connector on the other end to mate with the DLM. Cables, adapters and gender
changers designed for connecting a computer to a modem are available through many
computer, electronic or office supply stores.
The DLM also supports RS232 using only 3 wires, Transmit, Receive and Ground. Typically
3 wire RS232 is only used with custom cables to reduce the wiring cost. If using 3 wire
RS232 you will need to disable DTR detection and hardware handshaking by configuring the
DLM with “AT&K0&D0&W0” command. These changes are done via configuration
commands entered while connected to the DLM. You may need to initially connect to the
DLM using a standard RS232 cable or order your DLM preconfigured for 3 wire operation.
NOTE: While using the DLM with only 3 RS232 wires the “RTS” and “DTR” lights will
remain off. You will also not be able to use hardware handshaking or be able
to hang up the phone line by toggling the “DTR” line. Make sure any
connected hardware does not require the use of these lines.
1. Plug one end of the RS232 cable into an available RS232 communications port your
PC. This port is normally a 9 pin male D connector; however it may also be a 25 pin D
connector in some cases. Consult with your PC documentation for the location of this
connector.
2. Plug the other end of the RS232 cable from your PC into the 9 pin female D
connectors on the top of the DLM.
3. Start Hyper Terminal or other terminal emulator program. Select direct connect to the
serial port connected to the DLM. Unless configured for another baud rate or data
format, select 9600 bps (baud), 8 data bits, no parity, and 1 stop bit. If connecting for
configuration, turn off all handshaking.
If properly connected and not using a 3 wire connection the “CTS”, “RTS”, “DTR” and
“DSR” lights should be on. If not on check your cable connections and RS232 port on
your computer. If using 3 wire RS232 the “RTS” or “DTR” lights will be off. You can
only test a 3 wire RS232 connection by observing the “TX” light on the DLM and typing
keys on your keyboard while connected to the DLM.
4. Cycle the power and wait for the “CTS” and “DSR” lights to turn on. Then within 10
seconds type “ATi” followed by a carriage return (Enter key) in your terminal emulator
program. If properly connected you should see a text response on your screen. The
“TX” light should flash when you are typing. The “RX” light may flash when you type a
key or just after you press the carriage return key (Enter key).