Dial-Up / Leased-Line Modem
Contents
1. 15 Leased Line 81 dcbet s ih e iad e a end s 15 NOTE For Leased Line operation one DLM must be set for Originate and the other must be set for Answer 15 DSR amp S dete hd e De dere da de ned ed di ld Ted ce a ees 15 Display Configuration Settings amp V sss netten tentent 15 Save Changes amp W0 esee e nter nere eri eet i ed ied ie ud e tee 15 AT Command Control 96DGC cte dote e Roni dei de n dci ee ud 15 Inactivity Timer AT niin erbe neret te e Dc tee a tei e Iib b T es 16 Data Format SEB and amp P aa 16 Serial Baud Rate SSB cio be Min Bde s 16 MODULATION Reo Y 17 Modulation Selection 5 17 Display Modulation Selection 4MS sssssssssssssssseeee 17 Error Control amp Q ef ent en e pr t tree 17 S REGISTERS MP GCGC 18 Dialup Leased Line Modem TECHNICAL SUPPORT 19 DIAGNOSTICS AND TROUBLE SHOOTING ss2. installation Light Description CD Indicates the DLM is connected to a remote modem Indicates the DLM is ready to receive data or commands On unless CTS hardware handshaking is enabled If hardware handshaking is enabled then light will flash off when the internal buffer of the DLM is full Indicates the status of the RTS line When hardware handshaking is RTS enabled RTS indicates the DLM should stop sending data Will be off if 3 wire RS232 used Indicates the status of the DTR line DTR is used to disconnect a DTR connection when in either a Dial Up or Leased Line operation Will be off if 3 wire RS232 used DSR Indicates the DLM is ready to receive commands Always on RI Ring Indicator Indicates the phone line is ringing when connected to a Dial Up phone line Light will remain off for a Leased Line connection TX Flashes when characters are transmitted to the Modem Phone line RX Flashes when characters are received from the Modem Phone line Troubleshooting Hints Loss of Connection Failure to Connect Due to conditions beyond the control of the DLM the DLM may occasionally either disconnect or fail to make a connection when used with either Dial Up or Leased Lines Any system design using a DLM or any other modem must be able to detect an occasional communications fault and be configured to automatically recover When the DLM is used with Dial Up phone lines the master device initiating the
3. 15 Canadian EN 55022 EN 55024 GB4943 GB9254 Registration No AU7USA 25814 M5 E Ringer Equivalence 0 3B Dialup Leased Line Modem 4 Hardware Installation 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 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 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
4. 9 SETTING DLM FOR DIAL UP OPERATIONY eere eee eee emen nennen 9 SETTING DLM FOR LEASED LINE 11 CONFIGURATION e L 13 ENTERING COMMAND MODE 1 ereeeen eere rennen nnne nme 13 COMMON COMMAND 14 AnsWer iad E A e ENT CURT A HR SEE HE METER ARA 14 Dial D ctt tete itte nnt nn REIS 14 Echo Character Ejeren e Eei er aane e ERE deb e AR REIR RM RED ea EAR MC SRM ere 14 Hang Up amete mente tute 14 Monitor Speaker M tnnt te thin 14 Result Codes Enable Q sess eene tnter steterant trina 14 Result Codes Format V sisse eene 14 Carrier Detect amp ideni na Rare Ra Rte Ro REA Ta 14 Data Terminal Ready DTR Control amp D esses eene tnnt ntn nnns 15 Load Factory Settings SFO sss seen ternera 15 Flow Control amp
5. Dial Up Connections The following are possible causes of failed disconnect when using a Dial Up connection When used with Dial Up connection one of two methods is used to cause a modem to disconnect from the phone line The first is by toggling the RS232 DTR line and the second is through the use of the software hang up command sequence The software hang up command is ATHO 1 DTR line always active The DTH line is commonly used by software in computers and other devices to force a modem to hang up Check the green indicator lights DTR This light should be on during connection and should flash off for 1 second or longer when the controlling software in the computer or other device determines its time to hang up the phone line If the light is always off then you are most likely using 3 wire RS232 and the DLM has been set to ignore the status of the line You must use the software hang up sequence if using 3 wire RS232 If the light is always on then the computer or other devices is not controlling the DTR line You must either enable control of the DTR line or use the software hang up sequence If the DTR light flashes as indicate then the DLM may be set up to ignore the DTR line See below for solution To enable 2 DTR line is ignored by the DLM Dialup Leased Line Modem Diagnostics and Trouble Shooting The DLM can be set to ignore the DTR line via the comman
6. Examples Number S0 Number of rings before DLM answers First Ring ATSO 1 Disabled 50 0 Fifth Ring ATSO 5 51 Number of rings that have occurred ATS1 S6 Time in seconds between modem going ATS6 2 off hook and dialing number Range 2 65 Seconds S7 Time in seconds the DLM waits for carrier ATS7 50 before aborting a connection Range 35 65 Seconds 510 Sets the time in milliseconds the carrier ATS10 20 must be lost before disconnecting Range 1 254 Milliseconds 530 Sets the length of in minutes the DLM Disabled ATS30 0 will wait before disconnecting when no 1 Minute ATS30 1 data is send or received Also T Alternate 1 command Set to 0 to disable Range 1 255 Minutes 530 Sets the length of in minutes the DLM Disabled ATS30 0 will wait before disconnecting when no 1 Minute ATS30 1 data is send or received Also T Alternate 1 command Set to 0 to disable Range 1 255 Minutes Dialup Leased Line Modem 18 Diagnostics and Trouble Shooting Technical Support AGM Electronics Inc PO Box 32227 Tucson AZ 85715 USA Phone 520 722 1000 Fax 520 722 1045 www agmelectronics com 19 Dialup Leased Line Modem Diagnostics and Trouble Shooting Diagnostics and Trouble Shooting Indicator Lights Eight indicator lights are included on the front of a DLM to aid in troubleshooting your DLM
7. 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 Dialup Leased Line Modem 6 Hardware Installation NOTE In some cases you can simply check the connection by entering just the AT command and watching for AT to be echoed followed by OK The echoing of command characters as well as the response codes can be disabled so simply entering AT will not work Also when used in the Leased Line mode the DLM will only accept commands within the first 10 seconds after power up Following the above procedure of cycling the power then entering ATi will work in all cases Connecting to AGM Data Handler DH RS232 To connect a DLM to a RS232 Data Handler you will need a 9 pin female to 9 pin male null modem cable 1 Plug one end of the RS232 cable into the 9 pin male connector on the Data Handler 2 Plu
8. Indicator RS232 Connector Female DRO Ring Indicator TO Monitoring Speaker Phone Line Connection PHONE RJ11 LINE DLM 1 Dialup Leased Line Modem Introduction 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 L
9. disabled by connecting the DLM to a computer then entering AT amp KO amp WO DTR control may be disabled by connecting to a computer and entering AT amp DO amp WO Dialup Leased Line Modem 8 Getting Started Getting Started The DLM may be preconfigured at the factory In this case your DLM should be to use after you have made all hardware connections lf not preconfigured the following two sections will provide instruction on configuring your DLM See the Configuration Commands section for details on some of the available DLM configuration commands To configure your DLM you will need to connect to a computer running Hyper Terminal or other terminal emulator program See Connecting to Personal Computer section above for details on how to connect to your computer Setting DLM for Dial Up Operation The basic configuration for Dial Up operation is the same whether the DLM will be dialing out or answering Each of the following commands will be entered then followed with a carriage return Enter Key After entering each command wait for the OK response 1 Turn on the DLM and as soon as the DSR and CTS lights turn on enter AT DCO NOTE 1 You may not get a response from this command Some configurations disable the response to commands as well as the echoing of characters NOTE 2 It is possible to set up the DLM to ignore any commands To break out of this mode the DC0 command must be sent within the first 1
10. 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 amp KO amp DO amp WO 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 5232 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 lights should be on
11. the connection speed used over the phone line These protocols start at the fastest data transfer rate then reduce the speed until a connection can be made These protocols are designed to provide the fastest connection possible but not necessarily the most reliable As a result many modems including the DLM have the ability to force a connection to a specific protocol and data rate See the table in the MS command section for the supported communications protocols and the select the closest protocol to your RS232 communication rate Other modem manufacturers may suggest changing other registers or other commands but all the commands required to control the phone line modulation are contained within the MS command Dialup Leased Line Modem 22 Diagnostics and Trouble Shooting 23 In actual practice we have found that some modems and the DLM will not properly disconnect when the line modulation has been forced to a specific format To prevent problems we recommend keeping error correction on with the AT amp Q5 command and using the inactivity timer AT VT 1 command to provide a failsafe disconnect Incorrect Leased Line settings When used with Leased Lines one DLM must be set up to originate with the AT amp L1 command and the other to answer with the AT amp L2 command When used with Dial Up phone lines the Dial Up modem must be enabled with the AT amp LO command Failure to Disconnect on
12. 0 seconds after power up 2 Reset the DLM to its factory defaults by entering AT amp FO NOTE 1 You will get an OK response from this command NOTE 2 We recommend always restoring the DLM to factory defaults and reentering all settings in this procedure This guarantees the DLM is in a known condition 3 For connections other than to a computer where the data rate Baud Rate and data format can be determined from the AT command the DLM will need to be set to the correct data rate and data format Depending on the data rate of your connection enter one of the following command strings a 19200 bps AT SB19200 b 9600bps AT SB9600 c 1200 bps AT SB1200 d 300 bps AT SB300 9 Dialup Leased Line Modem Getting Started 4 N O A Depending on the data format of your connection enter one of the following command strings 8 data bits no parity 1 stop bit 8 data bits even or odd parity 1 stop bit AT EB1 P1 8 data bits no parity 2 stop bits AT EB1 P2 8 data bits even or odd parity 2 stop bits AT EB1 P0 7 data bits no parity 1 stop bit data bits even or odd 1 stop bit 7 data bits no parity 2 stop bits data bits even or odd 2 stop bits AT EB1 P0 2o79ooomp If using 3 wire RS232 or if hardware handshaking is not supported enter AT amp KO if using 3 wire RS232 or if DTR is not available form your device enter A
13. AGM Electronics Inc Dial Up Leased Line Modem Series 5019 1 Manual Rev A User Manual Dial Up Leased Line Modem he Dial Up Leased Line Modem 5 INTRODUGTION er etka sen scene ete eme eater cea a cece a a ee aca ee 1 OVEIVICW Ana nua aa Awa Whine 2 Theory of Operation and Construction sss ener enne trennen 2 General Specifications teniente een cede le pietre ie e a Wht rn 4 HARDWARE INSTALLATION otii derer acne sued Dec cn 5 TELEPHONE CONNECTION nies nn a Cue ace Ue 5 EEASED LINE CONNECTION 5 cnet 5 POWER CONNEC TON 5 CONNECTING A PERSONAL 6 CONNECTING HANDLER DH 232 7 CONNECTING AGM INTEGRATED CONTROL STATION ICS 7 CONNECTING AGM UNIVERSAL WEB STATION UWS 8 CONNECTING TO A 3 P PARTY PEG ta dioec eeu etd ta Sera 8 GETTING STARTED 55 dere REN
14. EB command set the number of bits and command sets the parity for data formats using 11 bits The following table indicates the command required to set the DLM to supported data format Data Format Command 8 data no parity 1 stop 8 data even parity 1 stop AT EB1 P2 8 data odd parity 1 stop AT EB1 P1 8 data no parity 2 stop AT EB1 P0 7 data no parity 1 stop 7 data even parity 1 stop 7 data odd 1 stop 7 data no parity 2 stop 7 data even parity 2 stop 7 data odd 2 stop ATSEB13 PO Serial Port Baud Rate SB Baud Rate Command 300 AT SB300 1200 AT SB1200 2400 AT SB2400 4800 AT SB4800 9600 AT SB9600 19200 AT SB19200 38400 AT SB38400 57600 AT SB57600 115200 AT SB115200 Dialup Leased Line Modem 16 Configuration Modulation Commands The following are more advanced commands used to set the modulation used by the DLM Under normal use the default settings should work however with marginal phone lines or compatibility between modems you may need to modify some of these settings Modulation Selection 5 The following table shows the various modulation types and the typical data rate used with the indicated modulation type Use this command for forcing the data connection to a specific rate over the phone line This modulation selection d
15. Leased Line Modem Diagnostics and Trouble Shooting modem to connect If the device successfully connects you may shorten up the delay b The answering device whether used for Dial Up or Leased Line is causing the connection to be aborted Answering and connecting will be aborted when either the DTR line becomes inactive or when characters are received by the DLM from device connected to the RS232 port For Dial Up operation a DLM set up to answer may also be set up to ignore both the DTR line and any commands received over the RS232 connection This will prevent the answering modem from aborting any connections in progress For lease line operation the settings described in the Getting Started section set up the DLM to ignore the DTR and AT commands This allows the Leased Line DLMs to connect without any intervention by the devices connected to the RS232 port Disable the DTR control with the command AT amp DO and disable the AT command set with the command AT DC1 NOTE With the AT command set disabled you will need to cycle the power and enter the command AT DCO within the first 10 seconds before the DLM will accept any commands Poor changing line conditions Bad phone lines either Dial Up or Leased Line will cause connection problems Sometimes these problems may be intermittent The more advanced communications protocols such as V 92 V 34 and V 32 are designed to accommodate these conditions by adjusting
16. T amp DO Save settings AT amp WO You are done configuring your DLM You may test the configuration by dialing out to another modem or DLM or by dialing into the DLM Dialup Leased Line Modem 10 Getting Started Setting DLM for Leased Line Operation When the DLM is used with a Leased Line one DLM must be set up to originate the connections and the other DLM set up to answer With the exception of the amp L1 and amp 2 commands described in step 6 below the commands to set up the DLM will be the same The following procedure will set up the DLM to automatically connect without any intervention from either connected device You do not need to have any device connected to the RS232 port Each of the following commands will be entered then followed with a carriage return Enter Key After entering each command wait for the response 1 11 Turn on and as soon as the DSR and CTS lights turn on enter NOTE 1 You may not get a response from this command The leased line configuration disables the response to commands as well as the echoing of characters NOTE 2 When used with Leased Lines the DLM will be set up to ignore any commands To break out of this mode the command must be sent within the first 10 seconds after power up Reset the DLM to its factory defaults by entering AT amp FO NOTE 1 You will get an OK response from this command NOTE 2 We reco
17. 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 5 Dialup Leased Line Modem Hardware Installation 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
18. amp DO Use for 3 Wire RS232 Enters Command Mode AT amp D1 Remains Connected Load Factory Settings amp F0 Enter AT amp FO to restore DLM to factory defaults Flow Control amp K Command Flow Control Disabled AT amp KO Use for 3 Wire 85232 Hardware CTS RTS Flow Control AT amp KS3 Software XON XOFF Flow Control AT amp K4 Leased Line amp L Command Dial Up Operation AT amp LO Leased Line Originate AT amp L1 Leased Line Answer AT amp L2 NOTE For Leased Line operation one DLM must be set for Originate and the other must be set for Answer DSR Control amp S Command DSR Always On AT amp SO DSR On only during connection AT amp S1 Display Configuration Settings amp V Enter AT amp V to display the current modem configuration settings Save Changes amp WO Enter AT amp WO to save the changes in the DLM non volatile memory AT Command Control DC Command AT Commands Enabled AT DCO AT Commands Disabled AT DC1 Dialup Leased Line Modem Configuration NOTE The will respond to a command for 10 seconds after power up Inactivity Timer T Command Inactivity Timer Disabled ANTO Inactivity Timer 1 Minute ATTI Inactivity Timer n Minutes Data Format EB and P Data Formats supported by the DLM will use either 10 or 11 bits These bits included the start stop data and parity bits
19. are to provide a better understanding of the commands used for setting up the DLM and to provide information for advanced modem uses in setting up custom configurations 13 Dialup Leased Line Modem Configuration Common Commands The following are the commands most commonly used in setting up your DLM Answer A Enter ATA to immediately answer an incoming call when in Dial Up operation Normally this command is unnecessary as the default setting for the DLM is to answer on the first ring Use register SO to change when the DLM will automatically answer Dial D Enter ATD followed by the phone number to dial the phone number when in Dial Up operation Echo Character E Command Command characters Echoed ATE1 Command characters Not Echoed ATEO Hang Up Enter wait for OK then enter ATHO to hand up the phone line Monitor Speaker M Command On until Connected ATM1 Always Off ATMO Always On 2 Result Codes Enable Command Enabled ATQO Disabled ATQ1 Result Codes Format V Command Numeric ATQO Words ATQ1 Carrier Detect amp C Command DCD On When Carrier Detected AT amp C1 DCD Always On AT amp CO Dialup Leased Line Modem 14 Configuration 15 Data Terminal Ready DTR Control amp D Command Hangs Up when DTR Drops AT amp D2 DTR Ignored AT
20. cable into the 9 pin female D connector on top of the DLM 3 Power up both the UWS and DLM If properly configured the DTR DSR CTS and RTS lights should be on If these lights are not on check your cable connections Connecting to a 3 Party PLC The DLM supports any PLC that uses a protocol based on 7 or 8 data bit asynchronous serial communications This includes ASCII Modbus RTU Modbus Allen Bradley DF1 Half Duplex and DNP3 protocols You must have the appropriate RS232 interface installed Consult with your PLC manufacture on the RS232 interface to use You will need a cable to connect from your PLC to a Modem If a cable of this type is not available you will need a Null Modem adapter and possibly a gender changer to connect your PLC to the DLM Null Modem adapters and gender changers are typically available through many computer electronic or office supply stores 1 Plug one end of the RS232 cable into your PLC See your PLC documentation for making this connection 2 Plug the other end of the RS232 cable from the PLC into the 9 pin female D connector on the top of the DLM 3 Power up both the DLM and PLC If properly configured the DTR DSR CTS and RTS lights should be on Some PLC s may not provide full hardware handshaking These PLC s may still be used with the DLM however you will need to disable the hardware handshaking and DTR control in the DLM Hardware handshaking may be
21. d AT amp DO To set the DLM to respond to the DTR line enter AT amp D2 amp W 3 DLM is not responding to software hang up command sequence The DLM can be set to ignore commands via the command AT DC1 Typically this is only used in Leased Line applications or on the answering modem to prevent a connection from being aborted due to received characters To enable the AT command you must cycle the power to the DLM then enter AT DC0 amp W within 10 seconds after power up Failure to Disconnect on Loss of Carrier In most applications the DLM will disconnect within a few seconds after the DLM detects the loss of carrier We have found that in some Leased Line applications the DLM may fail to disconnect When this occurs the CD light will remain on You may also get a stream of characters from the DLM To prevent this problem do both of the following 1 Make sure error correction is on with the AT amp Q5 command 2 Use the inactivity timeout command AT Tn where n is the number of minutes of inactivity Range of n is 1 to 255 minutes Typical setting is AT T1 which will work with continuous communications DLM Tries to Connect Immediately on a Dial Up Phone Line The DLM has two operating modes one intended for Leased Line applications and the other for Dial Up applications If you plug a DLM set up for Leased Line operation into a standard Dial Up phone the DLM will immediately go off hook and atte
22. dialing should monitor carrier detect for a communications failure and attempt redialing the phone number when a connection is broken When the DLM is used with Leased Lines and the DLM was set up according to this documentation the DLM will immediately attempt to reconnect on loss of carrier While an occasional dropped or failed connection can not be prevented complete failure to connect or frequent dropped or failed connections indicate a possible settings problem with your DLM and some settings may need to be modified to produce more reliable communications Dialup Leased Line Modem 20 Diagnostics and Trouble Shooting 21 The following are possible causes of failed connections and a possible course of action if any of the problems are encountered 1 Incorrect or damaged cable Check the green indicator lights DTR RTS DSR and CTS All lights should be on Also check the yellow TX light it should flash when the device connected to the RS232 port transmits the dial command If you are not getting the DTR and RTS lights but the TX light flashes then you may have a damaged cable or a 3 wire RS232 cable If the TX light does not flash you may have a null modem cable If the TX light does not flash then you will need a replacement cable The DLM can be configured to ignore missing DTR and RTS signals for use with 3 wire RS232 cables The default settings
23. eased 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 Dialup Leased Line Modem 2 Introduction When used with a Leased Line connection one DLM must be set up to originate and the ot
24. er of minutes then immediately attempt to reconnect a If communications will be continuous 1 b If communications will be slower than 1 minute per data transfer but less 254 minutes enter AT Tn Where is the data transfer rate in minutes plus 1 EG If transfer rate is 5 minutes then enter AT T6 8 Disable echoing of characters and the displaying of result codes NOTE You will not get an OK response from this or the following command Disabling the echoing of characters and displaying of result codes will prevent the DLM from interfering with the connected devices by introducing random characters into the data transferred Leaving the result codes enabled will however provide information about the connection which can be useful for diagnosing connection problems 9 Disable AT commands and save settings AT DC1 amp W0 10 You are done configuring your DLM You may test the configuration by connecting two DLM s together using a standard RJ 11 modular telephone cable When set up for Lease Line operation you do not need a telephone line The DLMs will connect on their own without any equipment connected to their RS232 ports Dialup Leased Line Modem 12 Configuration Configuration To modify the configuration of a DLM the following will be required 1 Computer with an available RS232 port 2 Terminal Emulator such as Hyper Terminal 3 Straight through RS232 cable to connect your compu
25. for the DLM for Dial Up operation are set to recognize the DTR line DTR is typically used to hang up modems such as the DLM The DLM can be set up to operate without a valid DTR signal however when disabled the only way to force a hang up is with the escape sequence of followed by the ATHO command When used for Leased Lines the configuration options contained in the Getting Started section disable DTR detection To disable DTR detection enter AT amp DO You may also want to disable hardware handshaking by entering AT amp KO Hardware handshaking will not prevent the DLM from making a connection however it will prevent data from being transferred 2 A connected device may be causing the DLM to disconnect a If using a Dial Up connection the device performing the dial out is not giving the DLM time to make the connection The connection time includes the time the dial takes to negotiate the phone system the time it takes for the remote modem to answer and the time it takes to make the connection You may check for this possibility by observing the DTR and TX lights The light should remain on except at the beginning of a dial out The TX light should not flash until connected Neither light should flash while a connection is in progress Set the dialing parameters in the device dialing out to 2 minutes or longer Two minutes is more than double the time it takes for a typical Dialup
26. g the other end of the RS232 cable into the 9 pin female D connector on top of the DLM 3 Power up both the Data Handler and DLM If properly connected the DTR DSR CTS and RTS lights should be on If RTS light is off the Data Handler may be configured for half duplex operation you may either turn off the half duplex in the Data Handler or disable the hardware handshaking in the DLM Hardware handshaking may be disabled by connecting the DLM to a computer then entering AT amp KO amp WO Connecting to AGM Integrated Control Station ICS To connect a DLM to an ICS you will need a 9 pin male to 25 pin female straight through cable 1 Plug the 25 pin end of the cable of the RS232 cable into the 25 pin D connector on the back of the ICS 2 Plug the other end of the RS232 cable into the 9 pin female D connector on top of the DLM Power up both the ICS and DLM If properly configured the DTR DSR CTS and RTS lights should be on If these lights are not on check your cable connections 7 Dialup Leased Line Modem Hardware Installation Connecting to AGM Universal Web Station UWS To connect a DLM to a UWS Data Handler you will need a 9 pin female to 9 pin male straight through cable 1 Plug one end of the RS232 cable into one of the 9 pin male connectors on the UWS Select either A or B depending on which port will be used with the DLM 2 Plug the other end of the RS232
27. her 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 3 Dialup Leased Line Modem Introduction 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
28. mmend always restoring the DLM to factory defaults and reentering all settings in this procedure This guarantees the DLM is in a known condition Depending on the data rate of your connection enter one of the following command strings a 19200 AT SB19200 MS V32B 0 0 19200 0 19200 b 9600bps AT SB9600 MS V32 0 0 9600 0 9600 1200 bps AT SB1200 MS V22 0 0 1200 0 1200 d 300 bps AT SB300 MS V21 0 0 300 0 300 Depending on the data format of your connection enter one of the following command strings 8 data bits no parity 1 stop bit 8 data bits even or odd parity 1 stop bit AT EB1 P1 8 data bits no parity 2 stop bits AT EB1 P2 8 data bits even or odd parity 2 stop bits AT EB1 P0 7 data bits no parity 1 stop bit data bits even odd 1 stop bit 7 data bits no parity 2 stop bits 7 data bits even or odd 2 stop bits AT EB1 P0 Dialup Leased Line Modem Getting Started 5 Set DTR control and Hardware handshaking a If hardware handshaking is not required enter _ AT amp DO amp KO b If hardware handshaking is required enter AT amp DO amp K1 6 Setthe Leased Line Mode a Originating DLM AT amp Lt b Answering DLM AT amp L2 7 Setinactivity timer The inactivity timer provides a failsafe in case communications is lost When communications is lost the DLM will disconnect after the specified numb
29. mpt to connect To switch a DLM to Dial Up operation use the command AT amp LO amp W Dialup Leased Line Modem 24 Appendix Appendix ified Diagram iring and Simp Reus auo 8229 Vec90c GSM eas epg 6109 NIG esee dnjeiq ET opewayog pue Buy ez PUOZUV ueson 801 9 aed aumeubig SjueisueJ woy seui piepuejs asn 4294 0G uey 1 1 104 224 OU JO 89 pue S ped uj Wov pejnu esr pod y 310 geg WOY 91 12euuoo ajewe ILN 6 2 esf 6 SI 40 99uU02 22254 XNY areg JAMSUY eur pesee civ apoy eur pasea 191 dn jeig 07197 Jamsuly ojny ejqeuj b 0SLY Jaquinu euoud payloads AR HHRLY v pJepuejs YIM si wapo SOJON UOWOD sbuies uomeinbjuo au eucud wapp eur esee dnjeiq AUG eeesu Ajddng Jemog q
30. oes not have an effect on the data rate used over the RS232 line Typical Modulation Command Rate Type 92 AT4MS V92 1 0 31200 0 56000 8 V 34 AT MS V34 1 0 33600 0 33600 V 32bis AT MS V32B 1 0 19200 0 19200 32 AT MS V32 1 0 14400 0 14400 V 22bis AT MS V22B 1 0 2400 0 2400 19200 V 32bis AT MS V32B 0 0 19200 0 19200 9600 V 32 AT MS V32 0 0 9600 0 9600 4800 V 32 AT MS V32 0 0 4800 0 4800 2400 V 22bis AT MS V22B 0 0 2400 0 2400 1200 V 22 AT MS V22 0 0 1200 0 1200 1200 Bell212A AT MS BELL212A 0 0 1200 0 1200 300 V 21 AT MS V21 0 0 300 0 300 300 Bell 103 AT MS BELL103 0 0 300 0 300 These settings set the modulation mode only and are typically used to automatically negotiate the data transfer rate The connection will start at the highest connection rate then drop according to the line conditions Display Modulation Selection MS The current modulation selection may be displayed by entering the MS command Error Control amp Q Command Error Control Enabled AT amp Q5 Error Control Disabled AT amp QO 17 Dialup Leased Line Modem Configuration S Registers The following is a table of the S registers used in the DLM Registers are set by entering ATSnzv where n is the register number and v is the value The status of any register may be read by entering ATSn where n is the register number Register Description
31. scssssssssssseseesseeneeensesenseeenseeeneeneuaenseeseeseneuaeaeaeseeneseeaesenavseeeneaeenees 20 leen wie d NIC cU covuchisuetecenssavancvenssvarsesatusecusdteat 20 TROUBLESHOOTING HINTS e ereeeeeii esses enses nenne sm ansam stata sa snas sms 20 Loss of Connection Failure to Connect sessi tent tnit 20 Failure to Disconnect on Dial Up Connections sse tette tnnt 23 Failure to Disconnect on Loss of Carrier s sss eene nnne nnns 24 DLM Tries to Connect Immediately on a Dial Up Phone Line sese 24 ree eite tdeo cfe E de id e fast 25 WIRING AND SIMPLIFIED 25 Dialup Leased Line Modem Introduction 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 Screw Terminal Connections Pin Description 1 Power 2 Power e _ _ Carrier Detect Indicator _ CTS CTS Indicator RTS 28 RTS Indicator DTR 28 DTR Indicator DSR
32. ter to the DLM 4 12to 30 volt power supply The DLM typically draws 170 mA 212 VDC 5 The Dial Up Leased Line Modem DLM The following instructions assume you are familiar with your terminal emulator program and how to connect the DLM to your computer See the Hardware Installation section for instructions on connecting the DLM to your computer The DLM uses AT commands like many internal and external modems used with computers Like other modems some of the AT commands are standard while others are specific to the manufacture All commands except the command to enter the command mode must be prefixed by AT The following sections describe the commands you are most likely need to modify A complete list is available from AGM Electronics Inc Entering Command Mode When used with Dial Up connections the escape character sequence of will switch form the data mode to the command mode When used with Leased Lines the DLM has a 10 second window after power up during which the DLM will always respond to commands There is also a 30 second delay between power up and when the DLM enters Leased Line mode Use the DC0 to allow commands beyond the first 10 seconds and amp LO command to disable the Leased Line mode NOTE We recommend always restoring the DLM to factory defaults and reentering all settings in the Getting Started Section This guarantees the DLM is in a known condition The commands in this section
33. warsuedl 00 usa Quia Qs 10013 MSIA SAHONI NI SNOISN3IQ TIY INNOW Pargeug Supyeyspuey BIEMPIE penejsueJ eq ULI Lq SAINDU Pargeug Supyeyspuey penejsueJ eq ULI Leq seieorpu 0 8 sejeoipu ipee Jer aui y eie sJejoeJeuo UYM seuse 4 pejseuuoo BY WAPO Sy 0 aie uou poreuuoo 51 26298 19410 10 55 sereorpu amp s wapoyy seearpul uun euoud sajearpu Bury gt SJojeoipul V Old Sol Hd oa 9 26254 Jemog 06 2 uonduoseg Dialup Leased Line Modem 25
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