Paradyne M/HDSL Standalone Termination Unit HOTWIRE... Скачать руководство пользователя

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Cables and Pin Assignments

C-2

7986-A2-GB20-00

September 1998

E1 Network Interface

The E1 network interface is either two BNC connectors (Transmit and Receive)
for a 75-ohm unbalanced interface, or an RJ48C, 8-position, unkeyed modular
connector (Table C-1, Figure C-1) for a 120-ohm balanced interface.

Table C-1.

E1 120-Ohm Balanced Interface

Connector

Signal

Pin Number

Receive Ring

Receive Tip

Receive Shield

Transmit Ring

Transmit Tip

Transmit Shield

Figure C-1.

E1 120-Ohm Network Interface Adapter Cable
(Feature Number 3100-F1-517)

Содержание M/HDSL Standalone Termination Unit HOTWIRE...

Страница 1: ...HOTWIRE MODEL 7986 M HDSL STANDALONE TERMINATION UNIT WITH G 703 INTERFACE USER S GUIDE Document No 7986 A2 GB20 00 September 1998...

Страница 2: ...n herein will be documented and issued as a new release to this manual Warranty Sales and Service Information Contact your local sales representative service representative or distributor directly for...

Страница 3: ...cables are provided with this product Special cables which may be required by the regulatory inspection authority for the installation site are the responsibility of the customer 7 When installed in t...

Страница 4: ...rmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference...

Страница 5: ...tion Unit Features 1 2 H Network Configuration 1 3 H Front Panel LED Status Indicators 1 4 H Rear Panel Interface Connections 1 4 H MIB Support 1 5 2 Using the Asynchronous Terminal Interface H User I...

Страница 6: ...it Using the Internal Switches 3 6 Switchpack Locations 3 7 Switchpack Definitions 3 8 H Accessing and Displaying Configuration Options 3 10 H Configuration Edit Display 3 11 H Configuring AutoRate 3...

Страница 7: ...Device Tests 5 8 Lamp Test 5 8 H Ending an Active Test 5 9 6 Messages and Troubleshooting H Overview 6 1 H Configuring SNMP Traps 6 2 H Device Messages 6 3 H Troubleshooting 6 5 7 Security H Overview...

Страница 8: ...Session Options A 11 H Communication Protocol Options A 13 SNMP Traps Options A 16 B Standards Compliance for SNMP Traps H SNMP Traps B 1 warmStart B 1 authenticationFailure B 1 linkUp and linkDown B...

Страница 9: ...s Terminal Interface Provides instructions for accessing the user interface and navigating through the screens Chapter 3 Initial Startup and Configuration Provides procedures for setting up the user i...

Страница 10: ...ications network and port interfaces power consumption values and accessory part numbers Glossary Defines acronyms and terms used in this document Index Lists key terms acronyms concepts and sections...

Страница 11: ...rates over a 4 wire full duplex circuit over varying distances based on the conditions of the 4 wire loop Examples include support for router multiplexer and PBX connections at 128 kbps with distance...

Страница 12: ...r Telnet session capability over the M HDSL link H Asynchronous Terminal Interface ATI Provides a menu driven VT100 compatible terminal interface for configuring and managing the termination unit loca...

Страница 13: ...orting a host or router and frame relay encapsulated or unframed data Frame Relay Switch Router E1 Host Frame Relay Encapsulated Data 98 16151 Router Frame Relay Encapsulated Data G 703 Router 2 048 M...

Страница 14: ...t panel LEDs refer to Chapter 4 Monitoring the Unit P O W E R A L A R M T E S T D S L G 7 0 3 98 16087 7986 M HDSL TM TM Figure 1 2 Hotwire Model 7986 Standalone Termination Unit Front Panel Rear Pane...

Страница 15: ...k 7986 AC INPUT AC 48VDC CLASS 2 OR LIMITED PWR SOURCE RTN 48V A A B B T5A 2 4 6 A B 3 1 2 POSITION STACK ALM A IN B DC FUSES T4A MIN 48V 5 DC PWR FAN OUT SERIAL MCC 1 3 1 2 3 SY ST EM OK Alr m Tes t...

Страница 16: ...About the Model 7986 Standalone Termination Unit 1 6 7986 A2 GB20 00 September 1998 This page intentionally left blank...

Страница 17: ...rminal interface session can be active at a time and another user s session cannot be forced to end To automatically log out a user due to inactivity enable the Inactivity Timeout option see Table A 5...

Страница 18: ...s you for a login ID and password Login Hotwire Model 7986 LOGIN Login ID Enter Password Ctrl a to access these functions Exit After you enter a valid login ID and password the Main Menu appears If yo...

Страница 19: ...atistics LEDs and device identity information Test Select and cancel tests for the termination unit s interfaces Configuration Display and edit the configuration options Control Change the device iden...

Страница 20: ...uration Control Factory Config Configuration Loader Current Configuration Edit Display System Options Communication Protocol Option Communication Port Management and Communication Telnet Session SNMP...

Страница 21: ...ad Configuration From Network Interface Options H Screen function key area This is the area below the dotted line that lists function keys specific to the screen field value choices and system message...

Страница 22: ...invalid data Ctrl k Tab backwards move cursor one field to the left Spacebar Select the next valid value for the field Delete Del Delete character that the cursor is on Up Arrow or Ctrl u Move cursor...

Страница 23: ...ntinue pressing the spacebar to scroll through other valid values Screen Function Keys All screen function keys located below the dotted line operate the same way upper or lowercase throughout the scr...

Страница 24: ...d line 2 Select either the function s designated underlined character or press the Tab key until you reach the desired function key Example To save the current screen type s or S Save 3 Press Enter 4...

Страница 25: ...reen to terminate the session Procedure To end a session with the asynchronous terminal interface 1 Press Ctrl a to go to the screen function key area below the dotted line 2 Save changes if required...

Страница 26: ...Using the Asynchronous Terminal Interface 2 10 7986 A2 GB20 00 September 1998 This page intentionally left blank...

Страница 27: ...H Connecting a system terminal H Providing initial unit identity information or changing existing identity information H Configuring your unit using internal switchpacks or using the Configuration Edi...

Страница 28: ...ect the power choose one of the following power supply types Connecting the Unit to an Optional External DC Power Source Using the dc power cable the Hotwire Model 7986 Standalone Termination Unit is...

Страница 29: ...it through the modular jack on the rear panel The system maintenance terminal allows you to view the status of the unit and change configuration options The terminal must be a VT100 compatible termina...

Страница 30: ...Save Fields on the Card Identity screen are null until you enter values The field values display 40 characters with a maximum field length of 128 characters If a field value is greater than 40 charac...

Страница 31: ...configured as an NTU If you are using this unit as an NTU the following configuration options may not need to be performed The Model 7986 Standalone Termination Unit is shipped with factory settings...

Страница 32: ...roper static control precautions to prevent damage to equipment If you are not sure of the proper static control precautions contact your nearest sales or service representative Procedure To configure...

Страница 33: ...20 00 September 1998 Switchpack Locations Use Figure 3 1 to locate Switchpacks S1 and S2 98 16073 Switchpack S1 S2 Front S2 Rear S1 6 7 8 ON 1 2 3 4 5 6 7 8 ON 1 2 3 4 5 Figure 3 1 Hotwire Model 7986...

Страница 34: ...tchpacks S1 and S2 OFF Switchpacks Disabled ON Switchpacks Enabled 2 Controls line termination OFF 120 Ohm ON 75 Ohm 3 Selects the unit s primary timing source Only valid for units configured as LTU O...

Страница 35: ...ates refer to Table 3 3 All OFF 2064 6 7 Not used 8 Emergency Use Only The Model 7986 has two banks of flash memory used to hold executable firmware This switch allows you to switch between the two ve...

Страница 36: ...ent Configuration Configuration Loader Default Factory Configuration Ctrl a to access these functions ESC for previous menu MainMenu Exit Make a selection by placing the cursor at your choice and pres...

Страница 37: ...d Communication Ctrl a to access these functions ESC for previous menu MainMenu Exit Save See Appendix A Configuration Option Tables for a list and explanation of the configuration options available S...

Страница 38: ...Rate Threshold 1E 6 AutoRate Disable DSL Line Rate 528 Peer IP Address 111 255 255 000 Clear Circuit Identifier Clear Ctrl a to access these functions ESC for previous menu MainMenu Exit Save Procedu...

Страница 39: ...time slots 0 and 16 or data only time slot 0 Table 3 4 Fixed Rate Payload Rates and DSL Line Rates Voice Mode G 703 to G 703 Data Mode G 703 to G 703 Data Mode G 703 to EIA 530 DSL Line Rate kbps Maxi...

Страница 40: ...d a configuration 1 Position the cursor in the Image File Name field Type the name of the file to be downloaded or the name to be used for the file to be uploaded The file name may be a regular path n...

Страница 41: ...m Server or Upload to Server 5 Position the cursor at the Start Transfer field Use the spacebar to select Yes Press Enter When the data transfer is complete the Transfer Status field changes to Comple...

Страница 42: ...sponse main config saveprompt Hotwire Model 7986 SAVE CONFIGURATION Save Changes No WARNING An answer of yes will cause the system to reset as if it had been powered off and on Ctrl a to access these...

Страница 43: ...e field Type the name of the file to be downloaded The file name may be a regular path name expression of directory names separated by a forward slash ending with the file name The total path name len...

Страница 44: ...Initial Startup and Configuration 3 18 7986 A2 GB20 00 September 1998 This page intentionally left blank...

Страница 45: ...e E1 network You can monitor Model 7986 Standalone Termination Unit operations by viewing H System and Test Status screens H Highest priority Health and Status messages on the last line of all screens...

Страница 46: ...S SELF TEST RESULTS TEST STATUS LOS at Net Pt 1 Device Failed No Test Active ESC for previous menu MainMenu Exit PgUp PgDn The System and Test Status screen has three sections H Health and Status Disp...

Страница 47: ...etwork provider LOF at G 703 Pt 1 An LOF Loss Of Frame condition has been detected on the G 703 interface 1 Verify that the network cable is securely attached at both ends 2 Contact network provider A...

Страница 48: ...1 Provide the 8 digit failure code shown yyyyyyyy to your service representative 2 Reset the Model 7976 Standalone Termination Unit to clear the condition and message Download Failed A firmware downl...

Страница 49: ...egrated circuit chips failed device level testing 2 Call your service representative for assistance G 703 Failed Pt 1 The Unit failed to loop data on the G 703 on Port 1 1 Reset the unit and try again...

Страница 50: ...ve Pt 1 A network Line Loopback test is active on Port 1 PLB Test Active Pt 1 A Payload Loopback test is active on Port 1 DTE Test Active Pt 1 A Data Terminal Loopback test is active on Port 1 RLB Tes...

Страница 51: ...0 000 000 Yes Yes Interval 04 000 000 000 000 000 000 Yes Yes Interval 05 000 000 000 000 000 000 Yes Yes Interval 06 000 000 000 000 000 000 Yes Yes Interval 07 000 000 000 000 000 000 Yes Yes Worst...

Страница 52: ...unning total of CRC errors Range 0 65535 This counter resets when the near end data is cleared Current Interval Performance data for the current 15 minutes Interval xx Historical performance data for...

Страница 53: ...l Timer 2 DSL Line Rate 2064 kbps Mrgn XmtPw RxGn Complete Near Far Near Far Near Far Near Far Current Int 02 01 03 03 02 02 Yes Yes Interval 01 02 03 02 Yes No Interval 02 02 01 03 03 02 02 Yes Yes I...

Страница 54: ...This counter resets every 15 minutes Payload Rate The Payload Rate across the DSL interface DSL Line Rate The rate of the DSL line The Line rate can be 144 kbps 272 kbps 400 kbps 528 kbps 784 kbps 10...

Страница 55: ...000 000 000 000 none Interval 06 000 000 000 000 000 none Interval 07 000 000 000 000 000 none Worst Interval 24 14 14 09 18 Tot valid 96 00010 00000 00000 00000 002 Ctrl a to access these functions E...

Страница 56: ...ine code violation detected None No significant events have occurred This Field Contains Current interval timer The number of seconds which have elapsed in the current 15 minute interval Maximum value...

Страница 57: ...LEDs provide the status of the G 703 interface H DSL Loop LEDs display the activity on the DSL network To view the LED status screen follow this menu selection sequence Main Menu Status Display LEDs m...

Страница 58: ...No power to the Unit Unit is in minimum mode and a download is required ALARM Red Off Device failure or Power On Self Test POST is not complete Self test passed TEST Amber Amber flashing Off Loopback...

Страница 59: ...6 TEST Network G 703 Tests Device Tests Abort All Tests Ctrl a to access these functions ESC for previous menu MainMenu Exit Select To Network and G 703 Tests Start and stop tests on the G 703 network...

Страница 60: ...pback Down Send Inactive 00 00 00 Pattern Tests Send and Monitor 511 Stop Active hh mm ss Errors 99999 Ctrl a to access these functions ESC for previous menu MainMenu Exit ResetMon Use the Command col...

Страница 61: ...AIS 98 15997 Procedure To run a Line Loopback 1 Position the cursor at the Start command next to Line Loopback on the Network Tests screen 2 Press Enter The Start command is changed to Stop 3 To manu...

Страница 62: ...rocedure To run a Repeater Loopback 1 Position the cursor at the Start command next to Repeater Loopback on the Network Tests screen 2 Press Enter The Start command is changed to Stop 3 To manually st...

Страница 63: ...edure To run a DTE Loopback 1 Position the cursor at the Start command next to DTE Loopback on the Network Tests screen 2 Press Enter The Start command is changed to Stop 3 To manually stop the test v...

Страница 64: ...to verify the link CAP G 703 Port CAP E1 LIU Framer Framer Transceiver 98 16001 CAP CAP E1 LIU Framer Framer Transceiver AIS Local Remote Procedure To run a Remote Send Line Loopback 1 Position the c...

Страница 65: ...n CAP G 703 Port CAP E1 LIU Framer Framer Transceiver 98 16002 CAP CAP E1 LIU Framer Framer Transceiver AIS AIS 511 Gen 511 Gen 511 Pattern 511 Pattern 511 Gen 511 Gen Procedure To run a Send and Moni...

Страница 66: ...to access these functions ESC for previous menu MainMenu Exit Lamp Test The Lamp test determines whether all LEDs are lighting and functioning properly Procedure To test the LEDs 1 Position the cursor...

Страница 67: ...after it has been running a specified period of time The default is 10 minutes Refer to Table A 3 System Options Test Timeout does not pertain to tests initiated by the network H On each test screen...

Страница 68: ...Testing 5 10 7986 A2 GB20 00 September 1998 This page intentionally left blank...

Страница 69: ...sages and Troubleshooting 6 Overview There are many resources available to assess the status of the device and contribute to problem resolutions Refer to the following sections H Configuring SNMP Trap...

Страница 70: ...ress and network destination for each SNMP manager specified H Select the type of SNMP traps to be sent from the Model 7986 Standalone Termination Unit To configure SNMP Traps follow this menu selecti...

Страница 71: ...tion needed Invalid Character x A nonprintable ASCII character x has been entered Reenter information using valid characters Invalid Data Terminal Initiated Loopback Active Network initiated loopback...

Страница 72: ...ned H No action needed H Enter a security record Password Matching Error Re enter Password Password entered in the Reenter Password field of the Administer Logins screen does not match what was entere...

Страница 73: ...sure the unit is configured properly Verify IP address and communication port usage H Reset the unit Device Fail appears on the System and Test Status screen under Self Test results The unit detects a...

Страница 74: ...port cables H Run Loopback tests Refer to Chapter 5 Testing H Use a crossover cable on the DSL network Cross PINS 1 2 to 4 5 be g used e S network H A test is being executed on the unit check the TES...

Страница 75: ...on option See Table A 5 Telnet Sessions Options in Appendix A Configuration Option Tables ATI Access Levels The Model 7986 Standalone Termination Unit has two access levels Administrator and Operator...

Страница 76: ...ue and include an access level Procedure 1 To create a login record follow this menu selection sequence Main Menu Control Administer Logins main control admin_logins Hotwire Model 7986 ADMINISTER LOGI...

Страница 77: ...aracters characters that can consist of 0 9 a z A Z pound period dash and slash Access Level Administrator Operator NOTE Assign at least one Administrator level Login ID Full access is necessary to ma...

Страница 78: ...nectivity can be restored via a terminal directly connected to the COM port Two methods can be used to restore access to the user interface H Reset COM Port Allows you to reset the configuration optio...

Страница 79: ...y will restore all factory loaded configuration and control settings contained in the Default Factory Configuration area are loaded If no or n is entered or if no selection is made within 30 seconds...

Страница 80: ...Security 7 6 7986 A2 GB20 00 September 1998 This page intentionally left blank...

Страница 81: ...of the MHDSL Network interface menu Once the address is assigned you can use the Model 7986 Standalone Termination Unit s ATI to assign H An IP address for each NMS to act as a trap manager See Table...

Страница 82: ...0 5 MCC LTU 8786 Port 2 Peer IP Address 126 35 10 1 NTU 8786 MCC MCC Base Address 126 35 1 1 MCC Base Subnet Mask 255 255 0 0 7986 NTU IP Address 126 35 7 2 LTU Peer IP Address LTU IP Address 126 35 7...

Страница 83: ...twork interface Ports G 703 Interface G 703 Interface Options Table A 2 G 703 interface port System System Options Table A 3 General system options of the unit Communication Port Communication Port Op...

Страница 84: ...db 6db 7db 8db 9db 10db Default Setting 0db Determines the level expressed in decibels at which a signal to noise margin condition is recognized 5db to 10db Sets the margin threshold to this value Exc...

Страница 85: ...000 223 255 255 255 Clear Default Setting 000 000 000 000 Specifies the peer IP address for the remote management providing the remote management link on the DSL loop This option is only available wh...

Страница 86: ...able A 2 G 703 Interface Options 1 of 2 Port Status Possible Settings Enable Disable Default Setting Enable Determines if the port can be configured and used to receive and transmit data Enable The po...

Страница 87: ...imary Clock Source Possible Settings G 703 Internal Default Setting Internal Specifies where the unit will derive its timing from Internal The clock source is derived from the internal oscillator G 70...

Страница 88: ...e unit is configured as a control unit Line Termination Unit NTU The unit is configured as a tributary unit Network Termination Unit This unit will request its IP address from the LTU during establish...

Страница 89: ...ending H The Test Duration min option appears when Test Timeout is enabled 1 to 120 Amount of time in minutes for a user initiated test to run before terminating G 703 Line Termination Possible Settin...

Страница 90: ...ons ESC for previous menu MainMenu Exit Table A 4 Communication Port Options 1 of 3 Port Use Possible Settings Terminal Net Link Default Setting Terminal Specifies how the communications port is to be...

Страница 91: ...the character length of the communication port 7 The character length of the communication port is seven bits 8 The character length of the communication port is eight bits Parity Asynchronous mode on...

Страница 92: ...a Telnet session Administrator This is the higher access level permitting full control of the Model 7986 Termination Unit Access level is determined by the Login ID If Telnet Login Required is disable...

Страница 93: ...tions determine what level of security to apply to the session to control access Only one Telnet session is allowed at a time Initial values are determined by the configuration you currently have load...

Страница 94: ...access level is interrelated with the access level of the Login ID Refer to ATI Access Levels in Chapter 7 Security for more information Administrator This is the higher access level permitting full c...

Страница 95: ...he Communication Protocol Options screen follow this menu selection sequence Main Menu Configuration Load Configuration From Management and Communication Comm Protocol Options main config management c...

Страница 96: ...Specifies where the default management network is connected for example if your default network is connected to the COM port select COM as the default management network destination None No default d...

Страница 97: ...000 000 the node IP Address will be used Address Field 000 000 000 000 255 255 255 255 Enter an address for the Communication Port Subnet Mask Clear Clears the address and sets to all zeros Communica...

Страница 98: ...SNMP Traps main config management trap Hotwire Model 7986 SNMP TRAPS OPTIONS SNMP Traps Enable Number of Trap Managers 5 NMS 1 IP Address 135 014 040 001 Clear Destination IMC NMS 2 IP Address 135 01...

Страница 99: ...ternet Protocol address used to identify each SNMP trap manager Address Field 000 000 000 000 223 255 255 255 Enter an address for each SNMP trap manager The range for the first byte is 000 to 223 wit...

Страница 100: ...d Up A linkUp trap is generated when the 7986 Termination Unit recognizes that one of the communication interfaces is operational Down A linkDown trap is generated when the 7986 Termination Unit recog...

Страница 101: ...cationFailure H linkUp H linkDown warmStart SNMP Trap Description Possible Cause warmStart The unit has reinitialized itself The trap is sent after the unit resets and stabilizes There are no variable...

Страница 102: ...573 This object provides the index into the ifTable and potentially into tables in other MIBs The values of ifIndex are the same for all models although not all indexes are supported for each model Th...

Страница 103: ...e or more of the units hardware components enterprisePrimary ClockFailClear 101 Clock failure has cleared N A enterpriseSecondary ClockFailClear 104 Clock failure has cleared N A enterpriseSelfTestFai...

Страница 104: ...priseFallbackAutoRate and enterpriseFallbackAutoRateClear enterpriseFallbackAutoRate Variable Bindings H ifIndex RFC 1573 This object provides the index into the ifTable and potentially into tables in...

Страница 105: ...ects control tests in SNMP managed devices noTest Stops the test in progress testLoopLLB Initiates a Local Loopback testLoopRLB Initiates a Remote Loopback testSendMon511 Initiates a Send and Monitor...

Страница 106: ...Standards Compliance for SNMP Traps B 6 7986 A2 GB20 00 September 1998...

Страница 107: ...g sections provide pin assignments H E1 Network Interface Cable H DSL Network Interface Cable and Connector H COM Port Interface Cable H Power Input Connector H Optional Power Cable POWER DSL COM TX R...

Страница 108: ...m unbalanced interface or an RJ48C 8 position unkeyed modular connector Table C 1 Figure C 1 for a 120 ohm balanced interface Table C 1 E1 120 Ohm Balanced Interface Connector Signal Pin Number Receiv...

Страница 109: ...e pins 1 2 to 4 5 is required for connecting two 7986 termination units back to back Figure C 2 DSL Network Interface Cable with RJ48C Connector Feature Number 7900 F1 514 97 15884 8 Pin Plug Pin 1 Pi...

Страница 110: ...8 position modular plug keyed connector and a DB9 socket connector Figure C 3 The COM port connector is an 8 position keyed modular jack Table C 3 The data signals on this port are referenced to a DT...

Страница 111: ...Cable The optional power cable is a 14 5 foot 18 AWG stranded cable The connector is terminated at one end with a 6 position Molex 39 01 2060 connector The other end of the cable is terminated with a...

Страница 112: ...Cables and Pin Assignments C 6 7986 A2 GB20 00 September 1998 This page intentionally left blank...

Страница 113: ...DC to DC converter that requires 24V power input The 24V power is distributed through a universal power supply supplied with the unit Maximum Power Dissipation 6 watts Cables and Cable Guide Feature...

Страница 114: ...Technical Specifications D 2 7986 A2 GB20 00 September 1998 This page intentionally left blank...

Страница 115: ...A mathematical method of confirming the integrity of received digital data Clear To Send A signal indicating that the device is ready for the DTE to transmit data Usually occurs in response to Reques...

Страница 116: ...of telecommunications A predetermined set of configuration options containing the optimum settings for operation on asynchronous dial networks Frame Alignment Signal A loss of signal LOS error detecti...

Страница 117: ...lization of the device that occurs at power up or in response to a reset command Repeater LoopBack Loops the signal being sent to the network back to the DTE Drop Insert and data ports after it has pa...

Страница 118: ...g TFTP is used where FTP is not available Transmit Data Pin 2 of the EIA 232 interface that is used by the DTE to transmit data to the modem Conversely the modem uses Pin 2 to receive data from the DT...

Страница 119: ...Assignments C 1 cabling COM Port to PC cable C 4 DC Power cable C 5 DSL Network Interface Cable C 3 Card Failed self test result 4 5 status message 4 4 Circuit Identifier A 3 Clock Failed status mess...

Страница 120: ...ory defaults 3 5 Failure self test result 4 5 feature numbers D 1 features 1 2 firmware download from server 3 17 Front Panel LEDs 1 4 G G 703 Interface Impedance A 7 G 703 Interface Options A 4 G 703...

Страница 121: ...ity 8 1 no test active status message 4 6 O OK LED 4 14 OOF Out Of Frame status message 4 3 options configuration tables A 1 overview 8775 Termination Unit 1 2 user s guide v P part numbers D 1 Passed...

Страница 122: ...0 A 12 login required A 12 A 14 telnet session access 7 1 telnet session options A 11 A 13 terminal communication parameters 3 3 connecting 3 3 terminal port direct connection 2 1 test aborting 5 9 DT...

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