Related Manuals for Data-Linc Group DLM4000
Summary of Contents for Data-Linc Group DLM4000
- Page 1 UIDE DLM4000 Dial-Up/Leased Line Modem It is essential that all instructions contained in the User Guide are followed precisely to ensure proper operation of equipment.
- Page 2 Product User Guide PN 161-09997-003A Feb 2005...
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Page 3: Table Of Contents
DLM4000 User Guide Table of Contents Page Operation Instructions Dia-Up Systems Example Lesased Line System Example LED Descriptions Connection Points Verifying Operation Setting Up Equipment for Bench Test Verification Setting Up and Using HyperTerminal for Testing Command Descriptions Registers Technical Specifications... - Page 4 DLM4000 User Guide PN 161-09997-003A Feb 2005...
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Page 5: Operation Instructions
3. This modem uses a 10-bit word format only. Below is a table of reference to understand the data formats supported. 4. When using the DLM4000 on a leased line, there are some specifications to note. The leased line must be an analog voice grade line or unshielded twisted pair, and must be two wire. - Page 6 Connecting the DLM4000 The DLM4000 provides an RS232 port for the connection to other devices. Below is a diagram of the serial port configuration. It is important to use the proper cable when connecting equipment to the DLM4000. It is recommended that only Data-Linc Group cables be used to ensure optimal performance.
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Page 7: Dia-Up Systems Example
PLC’s and other equipment. Examples are provided on the following pages. Dial-up System Example Diagram 1 DLM4000 multipoint full duplex system using a PC master and PLC remotes. The system may involve dial-up polling or periodic retrieval of data from remote locations. Dial-UP Phone Connection... -
Page 8: Led Descriptions
Leased line mode is another option that can be used when dial-up lines are not available or desired, (see diagram 3). This link is strictly a point-to-point full-duplex link. On unloaded lines, this link may be up to 20 miles. When the DLM4000 modems are being used on a loaded telephone company leased line the distance is unlimited. -
Page 9: Connection Points
PHONE 24VDC (24 VDC) The power connection to the DLM4000/24V is a terminal block. The connection points are designated in the above diagram. There is no on or off switch on this version. (RS232) The connection for the RS232 port on the modem is a DB25 female connection. This device is considered a DCE. -
Page 10: Verifying Operation
2. Two DLM4000 modems configured for dial-up operation. 3. A serial cable for connection to the computer. Refer to diagram below. 4. A paperclip or jumper wire for the serial port of the DLM4000. 5. A phone line simulator or preferably two direct dial-up lines. -
Page 11: Setting Up Equipment For Bench Test Verification
DLM4000 User Guide Setting up the Equipment for Bench Test Verification DLM4000/DL Bench Test Dial-Up Phone Connection Dial-Up Phone Connection to Telco Network to Telco Network RS-232 DATA-LINC DLM4000 GROUP DATA-LINC DLM4000 (425) 882-2206 GROUP (425) 882-2206 Master Station DLM4000/LL Bench Test... -
Page 12: Setting Up And Using Hyperterminal For Testing
DLM4000 User Guide Jumper Settings Note that HyperTerminal is required for connecting the dial-up DLM4000 modems to each other. Leased Line versions only need to be powered up and they will establish carrier between each other. The following steps will walk through launching and configuring HyperTerminal to talk to the DLM4000 modem. - Page 13 The jumper on the serial port of the receiving modem will allow data that is being sent to the modem to be sent back to the transmitting DLM4000. The text file that is being sent will be displayed on the screen of the computer. It is now time to transfer a text file.
- Page 14 Configuration Setup To enable AT command configuration of the DLM4000, the modem must be in command mode, which is the default mode for dial-up operation. To enable command mode, remove the modem cover and place J2 in positions 1-2. Positions 2-3 is leased-line mode.
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Page 15: Command Descriptions
DLM4000 User Guide DLM4000 Command Descriptions AT: The attention command clears the command buffer must precede all command lines except A/ and +++. A/: This command re-executes the last command in the command buffer. +++: This is the escape sequence to take the modem from data mode to command mode. - Page 16 Note: that a setting of zero dB may cause connection problems in some Telco circuits. This value must match in both modems. V: This command instructs the DLM4000 to send response codes in a word or digital form. V0: Sends response codes in digital form.
- Page 17 \Q3: Uses bi-directional CTS/RTS flow control. The data transmission from the local device to the DLM4000 stops when CTS is off, and resumes when CTS is on. Data transmitted from the DLM4000 to connected device stops when RTS is off, and resumes when RTS is on. This assumes connected device uses handshaking.
- Page 18 %E0: Disables automatic retrain capability. %E1: Enables auto-retrain. When the line quality is poor, the DLM4000 makes three attempts to re-establish the connection, for a total of 6 seconds, before it hangs up. This command is valid at speeds of 2400 bps or higher.
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Page 19: Registers
Default: 6 S10: Determines how long the DLM4000 will wait before hanging up after it detects a loss of carrier. This delay permits the carrier to momentarily disappear without causing the modem to disconnect. If this register is set to 255, the modem ignores carrier status as though a carrier was always present. -
Page 20: Configuring The Modem
DLM4000 User Guide Configuring the Modem The modem requires the use of AT commands to enable dialing when power is applied. The following are the required commands. &A: Activates a designated location in memory where the phone number to be dialed is stored. -
Page 21: Technical Specifications
DLM4000 User Guide Technical Specifications , s i , s i & , s i i t i e l i t l i t l u e l i l a t e l i n i l i l n... -
Page 22: Troubleshooting
2. Confirm that the leased line connection at both DLM4000 locations is connected properly. The two center pins of the jack are the correct pins. 3. Make sure that the leased line is a two wire leased line and not a four wire. The DLM4000 will not operate on a four wire leased line. - Page 23 I am trying to dial with the DLM4000, but the modem keeps disconnecting before establishing a carrier. 1. Ensure that the equipment connected to the dialing modem is not sending data into the DLM4000’s serial port. Any data sent into the modem in dial mode is viewed as a command and the dial sequence will be terminated. If it is not possible to discontinue the transmission of data, contact Data-Linc Group for help.
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Page 24: Technical Support
Data-Linc Group warrants equipment of its own manufacture to be free from defects in material and workmanship for one year from date of shipment to original user. Data-Linc Group will replace or repair, at our option, any part found to be defective. -
Page 25: Appendix A Enclosure Dimensions
18.42 cm 7.62 cm 10.53 in 26.75 cm 10.00 in 25.40 cm 1.375 in 3.49 cm Note: Enclosure Size, Mounting Holes and Locations may change without notice, contact Data-Linc Group (425) 882-2206 for the latest Enclosure Dimensions. PN 161-09997-003A Feb 2005... -
Page 26: Ccdf Module
Description The CCDF module is designed to allow Data-Linc Group dial-up modems to make their connection when continuous RS232 data is flowing into its RS232 port. This device is designed for use with Data-Linc Group dial-up modems DLM4000/DL and DLM4100/DL. - Page 27 AADB (Auto Answer Dial-Back) When Installed The DLM4000-AA Dial-Up Modem is capable of dialing a stored telephone number when a logic high signal is sent to a terminal block connection at the rear of the modem. The modem will keep dialing until one of the following occurs: 1.