User's Manual
Table Of Contents
- Health Limits for Orion® Reader Using External Antenna (902 to 921.5 MHz) 1-4
- Limites d’innocuité du lecteur OrionMD utilisé avec une antenne externe (902 à 921,5 MHz) 1-5
- Purpose of the Guide 1-3
- Intended Audience 1-3
- Guide Topics 1-3
- Typographical Conventions Used in this Manual 1-5
- Assessing and Formulating a Site Plan 2-3
- Preparing the Installation Site 2-3
- Components Checklist 2-4
- Task Checklist 2-4
- Where to Mount the Components 2-4
- Orion Reader Components 3-3
- Orion Reader Features 3-4
- Installing the Reader System Components 3-11
- Starting the Orion Reader 3-14
- Software Information 4-3
- TCP Command and Response Conventions 4-3
- Communication Between Orion Reader and Host 5-3
- Chapter Organization 6-3
- Operating the Orion Reader in Mode 88 6-4
- System Commands 6-6
- Responses to System Commands 6-10
- System Interface Command Group Commands (8000H) 6-13
- System Interface Command Group Responses 6-14
- System Interface Command Group Unsolicited Status Messages 6-20
- System Identify 6-21
- Set Time and Date 6-22
- Get Time and Date 6-23
- CPU App Firmware Download 6-23
- Reset Reader 6-24
- Get Buffered Tag Transaction 6-24
- Get Number of Buffered Tag Transactions 6-25
- Delete All Buffered Tag Transactions 6-26
- Get System Startup Status 6-26
- Get Lane Controller Interface Status 6-27
- Get System Interface Status 6-27
- Set Buffered Tag Transaction Mode 6-27
- Get Buffered Tag Transaction Mode 6-28
- Set Data Acknowledge Time-out Period 6-28
- Get Data Acknowledge Time-out Period 6-29
- Set Switch Buffered Tag Transaction Mode Enable 6-30
- Get Switch Buffered Tag Transaction Mode Enable 6-30
- FPGA Firmware Download 6-32
- CPU Boot Firmware Download 6-32
- Get System Serial Number 6-32
- Get Firmware Version Numbers 6-33
- Load Default Operating Parameters 6-33
- Set Lane Controller/Host IP Address 6-34
- Get Lane Controller/Host IP Address 6-34
- Set IP Address and Subnet Mask 6-35
- Get IP Address and Subnet Mask 6-36
- Get TCP Port Number 6-36
- Digital I/O Command Group Commands (4000H) 6-37
- Digital I/O Command Group Responses 6-38
- Digital I/O Asynchronous Reports 6-43
- Set Digital I/O Sensor Status Change Report 6-46
- Get Digital I/O Sensor Status Change Report 6-47
- Set Digital I/O Output Host Control 6-48
- Get Digital I/O Output Host Control 6-51
- Set Digital I/O Output Tag Read Control 6-52
- Get Digital I/O Output Tag Read Control 6-52
- Set Digital I/O RF Control 6-53
- Get Digital I/O RF Control 6-55
- Set Digital I/O RF Multiplexing Mode 6-55
- Get Digital I/O RF Multiplexing Mode 6-56
- Set Digital I/O Output Pulse Duration 6-57
- Get Digital I/O Output Pulse Duration 6-58
- Set Digital I/O Minimum Presence True Period 6-60
- Get Digital I/O Minimum Presence True Period 6-61
- Set Digital I/O Sensor Input Inversion 6-62
- Get Digital I/O Sensor Input Inversion 6-63
- Set Digital I/O Port Configuration 6-63
- Get Digital I/O Port Configuration 6-64
- Set Digital I/O Sensor Input Report 6-66
- Get Digital I/O Sensor Input Report 6-66
- Set Digital I/O Presence RF Control Algorithm 6-66
- Get Digital I/O Presence RF Control Algorithm 6-67
- Set Digital I/O Presence RF Control Time-out Period 6-69
- Get Digital I/O Presence RF Control Time-out Period 6-70
- Get Digital I/O Port Status 6-71
- Set Digital I/O Mode 6-73
- Get Digital I/O Mode 6-73
- Set External Interrupt Control 6-74
- Get External Interrupt Control 6-76
- RF Transceiver Command Group Commands (2000H) 6-77
- Tag Transaction Configuration Command Group Commands (1000H) 6-95
- Tag Transaction Configuration Command Group Responses 6-96
- Set Asynchronous Response Append Data 6-101
- Get Asynchronous Response Append Data 6-102
- Set Manual Antenna Channel Control 6-104
- Get Manual Antenna Channel Control 6-104
- Get Universal Configuration Table Version Number 6-105
- Set IAG Slot 6-105
- Get IAG Slot 6-106
- Set Secondary Tag Sequence 6-107
- Get Secondary Tag Sequence 6-108
- Set Master/Slave Mode 6-109
- Get Master/Slave Mode 6-112
- Mode Command Group Commands (0400H) 6-114
- Diagnostic Command Group Commands (0200H) 6-127
- TCP Tag Responses 7-3
- Specific TCP Tag Responses 7-3
- Why You Need to Configure a Lane 8-3
- Marking the Read Zone 8-3
- Lane Configuration Examples 8-5
- Error Indicators 9-3
- Troubleshooting Guidelines 9-4
- Communicating Via Diagnostic Port (COM2) 9-4
- Diagnostic Commands 9-8
- Error Log Reference 9-13
- System Initialization Module Errors 9-15
- Lane Controller Interface Module Errors 9-15
- System Interface Module Errors 9-17
- Mode Interface Module Error Numbers 9-18
- Tag Interface Module Error Numbers 9-18
- Sync Module Error Numbers 9-20
- GPS Module Error Numbers 9-20
- RF Transceiver Interface Module Error Numbers 9-21
- Diagnostic Module Error Numbers 9-26
- Tag Buffer Module Error Numbers 9-27
- Digital Input/Output Module Error Numbers 9-28
- Hardware Preventive Maintenance and Troubleshooting Procedures 9-28
- Replacement Instructions for Orion Reader and AVI Equipment 9-30
- Preventive Maintenance Schedule 9-33
- 9-34
- A Acronyms and Glossary
- B Hardware Interfaces
- C System Technical Specifications
- D Orion Reader Options
- Orion Reader Options 1-3
- Digital Input/Output Modules 1-4
- Guidelines for Ordering the I/O Modules 1-8
- Global Positioning System Timing Option 1-10
- E Command-Based Pre- and Post-Conditions
- 1
- Chapter 1 Orion Reader System Guide
- Chapter 2
- Chapter 3
- Installing the Orion Reader
- Orion Reader Components
- Orion Reader Features
- Installing the Reader System Components
- Mounting the Toll Antenna in an Overhead Location
- Caution
- To install the toll antenna
- 1. Place the toll antenna below the mounting pipe and insert a U-bolt around the pole and down through the bracket on the side of the antenna closest to the center of the lane. This antenna should be mounted toward the driver side of the traffic lane...
- 2. Rotate the antenna up and toward oncoming traffic. Rotate up 15° from horizontal for a lane. Use an inclinometer or angle finder to check the angle.
- 3. Tighten nuts with a torque wrench to 50 ft-lb (68 N-m).
- 4. Slide the shrink tubing over the coaxial cable, but do not heat it.
- 5. Connect the coaxial cable to the antenna and to the appropriate connector on the Orion Reader. Leave the shrink tubing loose until you have finished configuring the lane.
- Starting the Orion Reader
- To start the Orion Reader
- 1. Connect coaxial cable from toll antenna to ANT 1 port on Orion Reader for a single antenna configuration. Antenna ports 2-4 may also be used for systems requiring multiple antennas.
- 2. Connect host PC or lane controller to Orion Reader using the Ethernet TCP communications port (see Table 3-5.)
- 3. If using Sync to operate multiple lanes with Orion Reader, connect Sync cable to pins 3 and 4 of the Power, Sync, and I/O Connector on the Orion Reader.
- 4. Connect other options as required. See Appendix D, “Orion Reader Options” for detailed installation and operation information.
- 5. Connect the Orion Reader to 19V to 30V DC or 19V to 27V AC RMS @47-63 Hz power supply. See Figure 3-2 and Figure 3-3 for recommended wiring directions.
- Resetting the Orion Reader
- To start the Orion Reader
- 4
- Chapter 4
- Chapter 5
- Chapter 6
- Configuring and Operating the Orion Reader Using TCP Commands
- Chapter Organization
- Operating the Orion Reader in Mode 88
- System Commands
- Responses to System Commands
- System Interface Command Group Commands (8000H)
- System Interface Command Group Responses
- Command Complete (4800H)
- Command In Progress (4801H)
- Firmware Download Active System (4802H)
- Firmware Download Complete System (4803H)
- S-Record Processed System (4804H)
- Message Length Error Response Data (8200H)
- Message Sequence Error Response Data (8201H)
- Command Group Error Response Data (8203H)
- Data Acknowledge Response Error Response Data (8209H)
- Message Length Error Response Data (4200H)
- Command Sequence Error Response Data (4201H)
- Command Group Error (4203H)
- Command Time-out Error (4204H)
- Command Failed Error (4206H)
- System Command Error (4207H)
- Sub-Command Error (4208H)
- Invalid Control Word Error (420AH)
- Invalid Command Data Error (420BH)
- Erase Flash Error System (420EH)
- Write Flash Error System (420FH)
- System Interface Command Group Unsolicited Status Messages
- System Identify
- Set Time and Date
- Get Time and Date
- CPU App Firmware Download
- Reset Reader
- Get Buffered Tag Transaction
- Get Number of Buffered Tag Transactions
- Delete All Buffered Tag Transactions
- Get System Startup Status
- Get Lane Controller Interface Status
- Get System Interface Status
- Set Buffered Tag Transaction Mode
- Get Buffered Tag Transaction Mode
- Set Data Acknowledge Time-out Period
- Get Data Acknowledge Time-out Period
- Set Switch Buffered Tag Transaction Mode Enable
- Get Switch Buffered Tag Transaction Mode Enable
- FPGA Firmware Download
- CPU Boot Firmware Download
- Get System Serial Number
- Get Firmware Version Numbers
- Load Default Operating Parameters
- Set Lane Controller/Host IP Address
- Get Lane Controller/Host IP Address
- Set IP Address and Subnet Mask
- Get IP Address and Subnet Mask
- Get TCP Port Number
- Digital I/O Command Group Commands (4000H)
- Digital I/O Command Group Responses
- Command Complete (4800H)
- Command In Progress (4801H)
- Message Length Error Response Data (8200H)
- Message Sequence Error Response Data (8201H)
- Command Group Error Response Data (8203H)
- Data Acknowledge Response Error Response Data (8209H)
- Message Length Error Response Data (4200H)
- Command Sequence Error Response Data (4201H)
- Command Group Error (4203H)
- Command Time-out Error (4204H)
- Command Failed Error (4206H)
- System Command Error (4207H)
- Sub-Command Error (4208H)
- Invalid Control Word Error (420AH)
- Invalid Command Data Error (420BH)
- Digital I/O Asynchronous Reports
- Set Digital I/O Sensor Status Change Report
- Get Digital I/O Sensor Status Change Report
- Set Digital I/O Output Host Control
- Get Digital I/O Output Host Control
- Set Digital I/O Output Tag Read Control
- Get Digital I/O Output Tag Read Control
- Set Digital I/O RF Control
- Get Digital I/O RF Control
- Set Digital I/O RF Multiplexing Mode
- Get Digital I/O RF Multiplexing Mode
- Set Digital I/O Output Pulse Duration
- Get Digital I/O Output Pulse Duration
- Set Digital I/O Minimum Presence True Period
- Get Digital I/O Minimum Presence True Period
- Set Digital I/O Sensor Input Inversion
- Get Digital I/O Sensor Input Inversion
- Set Digital I/O Port Configuration
- Get Digital I/O Port Configuration
- Set Digital I/O Sensor Input Report
- Get Digital I/O Sensor Input Report
- Set Digital I/O Presence RF Control Algorithm
- Get Digital I/O Presence RF Control Algorithm
- Set Digital I/O Presence RF Control Time-out Period
- Get Digital I/O Presence RF Control Time-out Period
- Get Digital I/O Port Status
- Set Digital I/O Mode
- Get Digital I/O Mode
- Set External Interrupt Control
- Get External Interrupt Control
- RF Transceiver Command Group Commands (2000H)
- RF Transceiver Command Group Responses
- Command Complete (4800H)
- Command In Progress (4801H)
- Message Length Error Response Data (8200H)
- Message Sequence Error Response Data (8201H)
- Command Group Error Response Data (8203H)
- Data Acknowledge Response Error Response Data (8209H)
- Message Length Error Response Data (4200H)
- Command Sequence Error Response Data (4201H)
- Command Group Error (4203H)
- Command Time-out Error (4204H)
- Command Failed Error (4206H)
- System Command Error (4207H)
- Sub-Command Error (4208H))
- Invalid Control Word Error (420AH)
- Tag Transaction Configuration Command Group Commands (1000H)
- Tag Transaction Configuration Command Group Responses
- Command Complete (4800H)
- Command In Progress (4801H)
- Message Length Error Response Data (8200H)
- Message Sequence Error Response Data (8201H)
- Command Group Error Response Data (8203H)
- Data Acknowledge Response Error Response Data (8209H)
- Message Length Error Response Data (4200H)
- Command Sequence Error Response Data (4201H)
- Command Group Error (4203H)
- Command Time-out Error (4204H)
- Command Failed Error (4206H)
- System Command Error (4207H)
- Sub-Command Error (4208H)
- Invalid Control Word Error (420AH)
- Invalid Command Data Error System (420BH)
- Set Asynchronous Response Append Data
- Get Asynchronous Response Append Data
- Set Manual Antenna Channel Control
- Get Manual Antenna Channel Control
- Get Universal Configuration Table Version Number
- Set IAG Slot
- Get IAG Slot
- Set Secondary Tag Sequence
- Get Secondary Tag Sequence
- Set Master/Slave Mode
- Get Master/Slave Mode
- Mode Command Group Commands (0400H)
- Mode Command Group Responses
- Command Complete (4800H)
- Command In Progress (4801H)
- Message Length Error Response Data (8200H)
- Message Sequence Error Response Data (8201H)
- Command Group Error Response Data (8203H)
- Data Acknowledge Response Error Response Data (8209H)
- Message Length Error Response Data (4200H)
- Command Sequence Error Response Data (4201H)
- Command Group Error (4203H)
- Command Time-out Error (4204H)
- Command Failed Error (4206H)
- System Command Error (4207H)
- Sub-Command Error (4208H)
- Invalid Control Word Error (420AH)
- Invalid Command Data Error (420BH)
- Diagnostic Command Group Commands (0200H)
- Diagnostic Command Group Responses
- Command Complete (4800H)
- Command In Progress (4801H)
- Message Length Error Response Data (8200H)
- Message Sequence Error Response Data (8201H)
- Command Group Error Response Data (8203H)
- Data Acknowledge Response Error Response Data (8209H)
- Message Length Error Response Data (4200H)
- Command Sequence Error Response Data (4201H)
- Command Group Error (4203H)
- Command Time-out Error (4204H)
- Command Failed Error (4206H)
- System Command Error (4207H)
- Sub-Command Error (4208H)
- Invalid Control Word Error (420AH)
- 7
- Chapter 7
- Tag Responses
- TCP Tag Responses
- Specific TCP Tag Responses
- 8
- Chapter 8
- Configuring the Lane
- Why You Need to Configure a Lane
- Marking the Read Zone
- Required Supplies
- Guidelines
- To mark the read zone
- 1. Turn on continuous RF power using the #6411 command.
- 2. Secure the test tag to the end of the yardstick using electrical tape or hook-and- loop material. Be sure the tag polarization (horizontal or vertical alignment) matches that of the toll antenna.
- 3. Stand directly in front of and about 5 feet (1.5 m) away from the overhead toll antenna. Hold the stick so that the tag is positioned at a height and angle consistent with a tag installed on a vehicle. The audible tester sounds upon tag read. If t...
- 4. Mark the spot with chalk or tape.
- 5. Move to the left until the sound stops and mark the ground with chalk or tape at the location of the tag when the sound stopped.
- 6. Return to the center and then move to the right until the sound stops and mark the ground with chalk or tape at the location of the tag when the sound stopped.
- 7. Return to the center and step backward 2 feet (0.6 m) and repeat steps 5 through 7.
- 8. Continue moving the tag in this manner, placing marks on the ground to identify the boundary of the read zone each time the sound stops. Continue moving the tag to various locations until the read zone is fully marked.
- 9. You can now connect the outer marks to draw the outer boundary of the read zone.
- 10. Standing at the farthest point of the pattern, walk toward the toll antenna and listen for a continuous sound from the audible tester. If the sound is not continuous, it could indicate a weak or patchy RF pattern.
- Lane Configuration Examples
- 9
- Chapter 9
- System Diagnostics and Preventive Maintenance
- Error Indicators
- Troubleshooting Guidelines
- To perform a visual inspection
- 1. Make sure all component connectors are secure.
- 2. Make sure that the antenna is connected to the Orion Reader.
- 3. Make sure the Orion Reader is powered up by checking the Orion Reader Power LEDs. The NEMA Box must be open.
- 4. Make sure the Orion Reader is communicating with the lane controller/host system by checking operational/fault LEDs.
- 5. Review diagnostic commands and responses by accessing diagnostic port (COM2). The NEMA Box must be open.
- To perform a visual inspection
- Communicating Via Diagnostic Port (COM2)
- Diagnostic COM2 Port Pin Assignments
- Starting the Terminal Emulation Software
- To start the terminal emulation software
- 1. At the command prompt, type your terminal emulation start command, or if using Windows Hyper Terminal, select: Programs>Accessories>Hyperterm and press ENTER.
- 2. Enter a name for the session (e.g. myCOM1) and click OK.
- 3. From the Connect using pull-down list, choose the COM1 option (or whichever com port on the PC to which the RS–232 cable is attached) and click OK.
- 4. In the pull-down list on the COM1 Properties dialog box, choose the following settings:
- 5. Click OK.
- 6. Press ENTER several times to get a flashing cursor prompt (– > _ ).
- Diagnostic Commands
- bootChange
- Power Cycling the Orion Reader
- To power cycle the reader
- 1. Display the version by typing version. This provides the IP addresses for the Orion Reader.
- 2. Display the error log by typing ShowErrorLog. Using the Hyper Terminal, save the error log to a file by selecting Capture Text... from the Transfer drop-down menu (Figure 9-6). The Capture feature in the menu bar at the bottom of the screen darken...
- 3. Display the error condition status bits by typing ShowSysStatusBits.
- 4. Disconnect Power.
- 5. Reconnect Power.
- Error Log Reference
- System Initialization Module Errors
- Lane Controller Interface Module Errors
- System Interface Module Errors
- Mode Interface Module Error Numbers
- Tag Interface Module Error Numbers
- Sync Module Error Numbers
- GPS Module Error Numbers
- RF Transceiver Interface Module Error Numbers
- Diagnostic Module Error Numbers
- Tag Buffer Module Error Numbers
- Digital Input/Output Module Error Numbers
- Hardware Preventive Maintenance and Troubleshooting Procedures
- Replacement Instructions for Orion Reader and AVI Equipment
- Figure 9-9 Connector and Indicator Locations on the Orion Reader
- Replacing a Transmit/Receive Antenna on a Gantry
- To remove an antenna
- 1. Close traffic lane below where the antenna is being replaced.
- 2. Shut off RF power to the antenna.
- 3. Use an inclinometer to record the antenna angle from horizontal before moving it.
- 4. Cut off the shrink tubing from around the RF coaxial cable connector.
- 5. Disconnect the RF connector from the rear of the antenna.
- 6. Remove nuts and washers from U-bolts.
- 7. Remove antenna from mounting pipe.
- 8. Return antenna to Star Systems.
- To install a Transmit/Receive Antenna
- 1. Place the antenna below the mounting pipe and insert a U-bolt around the pole and down through the bracket on the side of the antenna closest to the center of the lane. This antenna should be mounted toward the driver side of the traffic lane. Pla...
- Caution
- 2. Rotate the antenna up and toward oncoming traffic. Rotate up 15° from horizontal for a dedicated lane or 10° up for a mixed-use lane. Use an inclinometer or angle finder to check the angle.
- 3. Tighten nuts with a torque wrench to 50 ft-lb (68 N-m).
- 4. Slide the shrink tubing over the coaxial cable, but do not heat it.
- 5. Connect the coaxial cable to the antenna. Heat the shrink tubing at the back of the antenna after configuring the lane.
- Preventive Maintenance Schedule
- Removal and Replacement Procedures
- Transmit/Receive Antenna
- To remove a transmit/receive antenna
- 1. Switch off power to the Orion Reader and disconnect the antenna from the port.
- 2. Remove shrink tubing covering connector.
- 3. Disconnect the antenna cable from the antenna.
- 4. Check the antenna mounting angle using an inclinometer and record the angle. Also, note the position of any spacers on the mounting bracket.
- 5. Remove the nuts holding the mounting bracket U-bolts, then remove the antenna.
- 6. When lane tuning is complete, use a heat gun to shrink the tubing covering the antenna cable connections.
- Replacement
- To install a replacement antenna
- 1. Position the new antenna along the mounting pipe.
- 2. Insert the U-bolts through the mounting brackets and secure with lock washers and nuts. Replace any spacers in the same position as before.
- 3. Set the antenna mounting angle to match the original antenna.
- 4. Tighten the mounting nuts to 50 ft-lb (68 N-m).
- 5. Put a length of heat shrink tubing over the antenna cable and connect the cable to the antenna.
- 6. Connect the RF cable to the Orion Reader.
- 7. Check the lane tuning.
- 8. When lane tuning is complete, use a heat gun to shrink the tubing covering the antenna cable connection.
- Antenna Cable
- To remove an antenna cable
- 1. Switch off power to the Orion Reader.
- 2. Disconnect the antenna cable from the Orion Reader antenna port.
- 3. Remove antenna cable from installation site. Because each installation may differ (e.g., cabling may be located inside or alongside mounting pipes), detailed removal instructions are not provided here.
- Replacement
- To install a replacement antenna cable
- 1. Route the new antenna cable between the antenna and Orion Reader as needed.
- 2. Connect the new cable to the Orion Reader at the antenna port.
- 3. Place a piece of heat shrink tubing over the antenna cable.
- 4. Connect the cable to the antenna.
- 5. Switch on power to the Orion Reader.
- 6. Check the lane tuning.
- 7. When lane tuning is complete, heat the shrink tubing covering the antenna cable connector.
- A
- Appendix A
- Appendix B
- C
- C
- Appendix D
- Orion Reader Options
- Orion Reader Options
- Digital Input/Output Modules
- Guidelines for Ordering the I/O Modules
- Global Positioning System Timing Option
- Figure D-5 GPS Assembly
- Figure D-6 Sync Configuration Using GPS Timing Option
- GPS Power and Data Connector
- Before Installing the GPS Antenna
- Required Components/Tools
- GPS Timing Assembly Mounting
- Caution
- 3. Connect the GPS assembly to the reader with the power/data cable provided in the GPS assembly kit.
- GPS Antenna Mounting
- 1. Select a location for the GPS antenna that provides maximum visibility to the sky.
- 2. Secure the antenna pole mounting hardware to the site structure.
- 3. Connect the antenna pole to the mounting hardware.
- 4. Insert the RF coaxial cable up through the inside of the mounting pipe and connect the cable to the antenna using a Type-N plug connector.
- 5. Pull the cable up through the pipe bottom or slot and terminate it at the antenna port.
- 6. Slip the antenna mount over the coaxial cable.
- 7. Screw the Type-N plug connector onto the type-N antenna receptacle connector and tighten until snug.
- 8. Connect the mount to the antenna by tightening the four captive screws until snug.
- 9. Push the antenna-mount assembly onto the antenna pipe or pole and tighten the hex-head set screws on the antenna mount.
- 10. Connect the antenna to the Orion Reader at the GPS antenna cable port (Figure D-5). Tighten this SMA connector to 10 in-lb.
- Caution
- E
- Appendix E
Orion Reader System Guide
A-4 Use or disclosure of Proprietary Information contained on this sheet is subject to the restriction stated on the title page of this document.
CMD command
command data set that is recognized by the receiving device as intending to elicit a specific
response
CPU central processing unit
CR carriage return
CRC cyclic redundancy check
crossover cable Ethernet cable equivalent of a null modem for serial cables. The crossover cable is
used so that two systems that use the same transmit and receive pins on the RJ-45 con-
nector can communicate.
CS commission status
CSN command sequence number
CTRL control
CTS clear to send
CVISN Commercial Vehicle Information Systems and Networks application, an ASTM Draft
6 Specification
CW continuous wave
D
DAC digital-to-analog converter
data information that is processed by a computing device
DC direct current
dB decibel(s)
dB
i
decibel(s), referencing isotropic radiator
DIAG diagnostic (command)
DIO digital input/output
DIOM digital input/output module
DL downlink
DLL dynamic link library
DM diagnostic module
DOM depth of modulation
DSR data set ready