Motorola DDS/MR64 Installation And Operation Manual Download | Manualshive

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Summary of Contents for DDS/MR64

Page 1: ...DDS MR64 Installation and Operation Motorola 5000 Bradford Drive Huntsville AL 35805 1993 Doc No 6 456 5246 02 014 October 1994 1994 Motorola ...

Page 2: ... Motorola 5000 Bradford Drive Huntsville Alabama 35805 1993 205 430 8000 TRADEMARKS Motorola is a registered trademark of Motorola Inc NOTICE All titles versions trademarks claims of compatibility etc of hardware and software prod ucts mentioned herein are the sole property and responsibility of the respective vendors Motorola makes no endorsement of any particular product for any purpose nor clai...

Page 3: ...ntil the problem has been resolved If your equipment continues to disrupt the network the telephone company may temporarily discon nect service If this occurs you will be informed of your right to file a complaint with the FCC WARNING This equipment uses generates and can radiate radio frequency energy interfering with radio communications if not installed and used in accordance with the instructi...

Page 4: ...iv ...

Page 5: ...ions Chapter 3 Operation Describes operation of the DDS MR64 Chapter 4 Configuration Describes selectable options and how to apply them Chapter 5 Diagnostics Describes test data loops and features Chapter 6 Troubleshooting Describes tests and indications used to locate or isolate malfunctions Chapter 7 Non DDS applications Describes the use of the DDS MR64 as a limited distance modem Chapter 8 Rat...

Page 6: ...helf mount units Opera tion and function of either unit is identical Where necessary this manual provides detailed information in support of the standalone unit Detailed information in support of the shelf mount unit can be found in the shelf installation and operation manual ...

Page 7: ...Operation GENERAL 3 1 DATA TERMINAL EQUIPMENT DTE 3 1 DTE INTERFACE CONNECTORS 3 1 Request to Send 3 3 Clear to Send 3 3 Transmitter Clock 3 4 Transmit Data 3 4 External Clock 3 4 Received Line Signal Detector 3 4 Receive Clock 3 5 Receive Data 3 5 Data Set Ready 3 5 No Signal 3 5 GROUNDING 3 5 Protective Ground 3 5 Signal Ground 3 5 DTE INITIATED TEST SIGNALS 3 6 Local Line Loopback 3 6 Remote Te...

Page 8: ...2 Rate 4 2 Synchronous Asynchronous 4 2 Bits Per Word 4 2 RTS Control 4 3 Buffer 4 3 Loopback 4 3 DSR 4 3 System Status 4 4 Circuit Assurance 4 4 RTS CTS Delay 4 4 64 k Scrambler 4 4 OPTION SELECTION 4 5 Front Panel Option Selection 4 5 Front Panel Initiated Tests 4 6 Configuration Option Menu 4 6 STRAP SWITCH CONFIGURATION 4 11 Cover Removal 4 12 Replacing the Cover 4 12 Front Panel Option 4 14 C...

Page 9: ...ON 6 1 TM LED ON 6 1 TM LED FLASHING 6 1 SELF TEST 6 2 END TO END TEST 6 2 LOCAL LOOPBACK TEST 6 2 REMOTE LOOPBACK TEST 6 2 REMOTE LOOPBACK WITH TEST PATTERN 6 3 Chapter 7 Non DDS Applications GENERAL 7 1 INSTALLATION 7 1 TIMING 7 2 OPTIONS 7 3 TESTS 7 3 Chapter 8 Rate Adapter Option GENERAL 8 1 FRONT PANEL DISPLAY 8 1 Operating Distance 8 1 RATE ADAPTER CONFIGURATION OPTIONS 8 2 Timing 8 2 Rate 8...

Page 10: ...Table of Contents x DDS MR64 Appendix A Specifications ...

Page 11: ...s or 57 6 kbps over 56 kbps or 64 kbps lines synchronous DTE rates of 19 2 kbps or 9600 bps over 56 kbps or 64 kbps lines and a synchronous or asynchronous DTE rate of 1200 bps over a 2400 bps line PHYSICAL DESCRIPTION The DDS MR64 is a standalone desktop unit The front panel Figure 1 1 contains six Light Emitting Diodes LED s three pushbuttons and an LCD screen The rear panel Figure 1 2 contains ...

Page 12: ...Introduction 1 2 DDS MR64 Figure 1 1 Front Panel Figure 1 2 Rear Panel OS NS TD DDS MR64 RD CS YES TM NO HOME POWER ON OFF 1 4 AMP S B DTE DDS 115 VAC 60 HZ 1 4 AMP ...

Page 13: ...ngs Front panel pushbutton configuration and operation Nonvolatile memory for configuration storage RS232 or CCITT V 35 DTE interface can be selected by switches on the circuit board Asynchronous 38 4 kbps or 57 6 kbps DTE rates over 56 kbps or 64 kbps DDS lines Synchronous 19 2 kbps or 9600 bps over 56 kbps or 64 kbps lines Synchronous or asynchronous 1200 bps over 2400 bps lines COMPATIBILITY Co...

Page 14: ...Introduction 1 4 DDS MR64 ...

Page 15: ...mes of temperature humidity appreciable shock and vibration Allow sufficient space at the rear of the unit for signal line and interface cable clearance HARD OPTIONS The PC card has two strap options that should be verified or changed prior to installation These options are factory set for standard installa tions The factory options are described in Chapter 4 If a hard option requires changing fol...

Page 16: ... now perform all functions as determined by option configuration Chapter 4 Figure 2 1 Connection Using the RJ48 Jack POWER ON OFF 1 4 AMP S B DTE DDS 115 VAC 60 HZ 1 4 AMP DTE cable RJ48 jack EIA 232 25 pin connector to DTE DDS 8 pin Power cord ...

Page 17: ...42A Block POWER ON OFF 1 4 AMP S B DTE DDS 115 VAC 60 HZ 1 4 AMP 42A block EIA 232 25 pin connector to DTE Power cord DDS 8 pin ON Red Terminal block To central office Screw terminal To modem Green Black Orange Brown Blue Gray Yellow TX Pair RX Pair DTE cable ...

Page 18: ...Installation 2 4 DDS MR64 ...

Page 19: ...DTE interface to the DDS MR64 is through a 25 pin D type connector The sense levels and impedances conform to either EIA 232 or CCITT V 35 INTERFACE depending on the option switch selected The type of DTE interface selected in the unit is displayed on power up DTE INTERFACE CONNECTORS Pin functions of the DTE interface connector are listed in Table 3 1 and Table 3 2 Table 3 1 CCITT EIA 232 Connect...

Page 20: ...st Pattern 22 12 V 9 12 V 10 Table 3 2 V 35 Connector Circuit Function D Connector Pin V 35 Connector Pin Protective ground 1 A Signal ground 7 B Request to Send RTS 4 C Clear to Send CTS 5 D Data Set Ready DSR 6 E Received Line Signal Detector RLSD 8 F Test mode 25 K and NN No signal 12 M Rx data A 3 R Rx data B 16 T Rx clock A 17 V Rx clock B 19 X Tx clock A 15 Y Tx clock B 13 AA Tx data A 2 P T...

Page 21: ...Send CTS This signal goes on when the DDS MR64 is ready to transmit data and is in response to RTS going on The normal RTS on to CTS on delay depends on the data rate refer to Table 3 3 When CTS is off the DDS MR64 ignores input data Circuit Function D Connector Pin V 35 Connector Pin Tx data B 14 S External clock A 24 U External clock B 23 W Remote loopback 21 BB and N LL loopback 18 J RT loopbac...

Page 22: ...its data to the DDS MR64 External Clock This signal goes on when the DTE sends transmit timing information to the DDS MR64 This option may be used in non DDS applications or to clock data into the buffer when the buffer option is enabled When external clock is used it must be within 0 1 of required frequency Received Line Signal Detector RLSD Also known as Carrier Detect CD This signal goes on whe...

Page 23: ...cur within 25 of the nominal bit time This signal is held in a mark state when RLSD is off Data Set Ready DSR This signal goes on when line and equipment conditions are all set for data transfer DSR must be on to transmit data and can be forced on regardless of conditions Note The behavior of DSR may depend on the status of the System Status OPTion SS OPT Refer to System Status in Chapter 4 No Sig...

Page 24: ...ne Remote Terminal Loopback RT When the DTE turns RT on the DDS MR64 loops data to and from the DDS line through the DTE interface A bilateral loopback also provides a loopback path for connecting the DTE transmit and receive data Remote Loopback RL When the DTE turns RL on the DDS MR64 sends a command to the remote DDS MR64 causing it to go into RT loopback When RL is turned off the DDS MR64 send...

Page 25: ...to compensate for any length DDS line SEALING CURRENT When the DDS MR64 is used as a Limited Distance Modem the DDS MR64 has the ability to source sealing current A dip switch Figure 3 1 on the stand alone unit PC board or the auxiliary jack along with the dip switch on the shelf mount unit provides this service Do not use this switch or connect this jack if the unit is operating over the DDS netw...

Page 26: ...itive voltage is used pin 8 should be ground and pin 1 should be 48 volts Voltages lower than 48 volts may be used causing a proportional decrease in sealing current The sealing current will be between 4 and 20 mA depending on line length FRONT PANEL INDICATORS Pushbuttons Configuration control is through the three pushbuttons on the front panel The pushbuttons allow the user to configure the DDS ...

Page 27: ...64 is in a Test Mode Blinks at one half second rate when the DDS MR64 is placed in RT loopback by the Telco Blinks at one second rate when placed in RL by the remote DSU Blinks at two second rate when placed in CSU local loop back CSULL by the Telco NS ON indicates that there is No Signal from the DDS line OS ON means that a Telco Out Of Service code is received CS ON indicates that Clear to Send ...

Page 28: ...Operation 3 10 DDS MR64 ...

Page 29: ...est If the test fails the LCD displays ERROR If an error occurs ensure it is consistent and then refer to Maintenance If no error occurs the LCD advances to one of three displays NO SIGNAL SYNC DTE RATE 1 ASYNC DTE SYNC RA RATE1 RATE1 RATE2 ASYNC RA 1200 2 4K BPS LINE In the DDS mode NO SIGNAL means there is no connection to the DDS network When used as a limited distance modem NO SIGNAL means the...

Page 30: ...hronousSYNC ASYNC The sync async option is used to configure the DDS MR64 to operate either synchronously or asynchronously Bits Per WordBITS WORD The bits word option is used to select the asynchronous word size The word size is computed by adding the number of data bits the number of stop bits the number of parity bits 0 to 1 and one start bit The bits word option can be 8 9 10 or 11 The previou...

Page 31: ...rance OPTion CA OPT Refer to Chapter 4 Circuit Assurance Buffer BUFF OPT This option is used to buffer externally clocked transmitted data and can be enabled or disabled The option is used mainly with a crossover cable in tail circuit applications When enabled transmit data from the DTE is clocked into the buffer using the external clock from the DTE Data is clocked from the buffer to the DDS line...

Page 32: ...n can be used when the remote DDS MR64 maintains a permanent RTS to verify a complete link before sending data Note When using DDS MR64 units for multi point links the master unit must have both the CA and SS options disabled RTS CTS Delay RS CS DLY Certain applications and DTE devices require longer RTS CTS delay times than others The approximate RTS on to CTS on delay time selec tions are 25 ms ...

Page 33: ... Data line characteristics SYNC DTE ASYNC DTE Data Rate Data Rate ASYNC DTE 57 6 SYNC RA 19200 ASYNC DTE 38 4 SYNC RA 9600 Data Rate SYNC RA 1200 Data Rate ASYNC RA 1200 2 4K BPS LINE Where Data Rate is equal to 2 4 4 8 9 6 19 2 56 or 64 kbps LINE DTE Tests TEST PATTERN REMOTE LOOBACK OK UNRECEIVED TEST PATTERN REMOTE ERRORS TERMINAL LOCAL REMOTE LOOPBACK LOOPBACK RECEIVED Remote Test TELCO INITIA...

Page 34: ...ropriate message is displayed Press NO to bypass a test and HOME to return to data mode Once a test is selected YES or NO attempts to clear ERRORS and HOME exits the test The following is a list of the available tests RL TP Remote Loopback with Test Pattern LL TP Local Loopback with Test Pattern T PEnd to End Test Pattern Test RT Remote Terminal Loopback LL Local Loopback RL Remote Loopback Chapte...

Page 35: ...tern Ok Test Pattern Errors Remote Loopback Unreceived Home Yes No Home No Home Local Loopback With Pattern Test Pattern Ok Test Pattern Errors Home Yes No Home Test Pattern Test Pattern Ok Test Pattern Errors Home Yes No Home Remote Terminal Remote Terminal Home Local Loopback Local Loopback Home Remote Loopback Remote Loopback Received Remote Loopback Unreceived Home No Home 3 Sync DTE Change As...

Page 36: ...ge To 9 6k programmed rate Change to 4 8K programmed rate Change to 2 4k programmed rate Yes No Home Yes No Home Yes No Home 6 Rate Adapter 19 2k bps Change Rate Adapter 9 6k bps Change Yes No Home Yes No Home 7 Change Timing Programmed Timing Change To Int Programmed Timing Change To DDS Programmed Timing Change To Ext Programmed Timing Yes No Home Yes No Home Yes No Home 8 Change Data Timing Cha...

Page 37: ... Change Sim Sw Cr A Strm Change Yes No Home Yes No Home Yes No Home Yes No Home Yes No Home Note Submenu 5 displays only 64 k 56 k and 2 4 k when the rate adapter option is enabled If async is selected Main Menu 5 cannot be accessed and line rate is automatically set to 2 4 kbps Note Main Menu 6 can only be accessed if the rate adapter option is enabled and 56 k or 64k line rate is selected Note M...

Page 38: ...Change DSR Opt Disabled Change Yes No Home Yes No Home Change Sys Status Opt SS Option Enabled Change SS Option Disabled Change Yes No Home Yes No Home Change CA Option CA Option Enabled Change CA Option Disabled Change Yes No Home Yes No Home Change RTS CTS Delay RTS CTS Normal Change Dly CTS 25 mSEC Change Dly CTS 30 mSEC Change Dly CTS 60 mSEC Change Yes No Home Yes No Home Yes No Home Yes No H...

Page 39: ...the DDS MR64 main board Warning Turn the power OFF and unplug the power cord before removing the cover Main Menu Submenu Submenu Item Pushbutton s 12 Change Control Options continued Change DTE LL Opt DTE LL Enabled Change DTE LL Disabled Change Yes No Home Yes No Home Change DTE TP Opt DTE TP Enabled Change DTE TP Disabled Change Yes No Home Yes No Home Change DTE RT Opt DTE RT Enabled Change DTE...

Page 40: ...t removal by prying the cover from the chassis with your fingers on the units rear edges Repeat this procedure on the remaining three latch slots Figure 4 1 Cover Removal Replacing the Cover Align the rear panel slide guides and the front panel lock tabs Press the cover to the chassis until the lock prongs engage the lock clips Option straps and switches are illustrated in Figure 4 2 Cover Lock Cl...

Page 41: ...Configuration DDS MR64 4 13 Figure 4 2 Option Straps and Switches Factory defaults shown RS232 RS232 V 35 V 35 1 2 3 4 ON ON OFF OFF EN DIS CH GND 1 2 3 4 5 6 7 8 Front Panel SIG GND ...

Page 42: ...options currently selected The operator is limited to scrolling through and viewing those options Factory default Chassis Signal Ground CH GND connects signal ground to chassis ground This option helps eliminate some interference problems SIG GND separates signal ground from chassis ground Factory default EN Front panel c selected DIS SIG GND Signal ground conne to chassis ground s CH GND ...

Page 43: ... the DTE connector in V 35 mode Switch 3 12 V ON connects and OFF disconnects the 12 V from the DTE connector Switch 4 12 V ON connects and OFF disconnects the 12 V from the DTE connector Switch 6 NS EIA RS232 ON connects and OFF disconnects the No Signal output to the DTE connector in EIA RS232 mode Switch 7 ISO 2593 Affects the pins used for TP and LL DTE test inputs on the V 35 connector ON the...

Page 44: ...Configuration 4 16 DDS MR64 ...

Page 45: ... test causes the local DDS MR64 to loop back a remotely generated test signal to check the remote unit Figure 5 1 If the signal returns unchanged the remote unit and the DDS network are OK A bilateral loopback test lets the local DTE loop a signal through the DTE interface This tests the DTE transmit and receive circuits Local Line Loopback LL This test checks the transmit and receive logic compon...

Page 46: ...l Loopback RT Figure 5 2 Local Line Loopback LL DTE DTE Interface Local Unit DDS Line Bilateral Loopback TRANSMIT LOGIC LINE DRIVER RECEIVE LOGIC LINE RECEIVER DTE DTE Interface Local Unit DDS Line TRANSMIT LOGIC LINE DRIVER RECEIVE LOGIC LINE RECEIVER ...

Page 47: ...e unit Figure 5 4 The local DDS MR64 sends a signal to the remote unit causing it to go to the RT configuration The local DTE can then transmit data which will be looped back at the remote unit and received by the local DTE If the signal returns unchanged the local DDS MR64 DDS network and remote unit is functional The remote unit must be a Motorola CSU DSU or any CSU DSU that complies with CCITT ...

Page 48: ...re 5 4 Remote Loopback RL DTE Interface DTE TRANSMIT LOGIC RECEIVE LOGIC LINE DRIVER LINE RECEIVER DDS Line Local Unit DTE Interface DTE RECEIVE LOGIC TRANSMIT LOGIC LINE RECEIVER LINE DRIVER DDS Line Remote Unit Bilateral Loopback ...

Page 49: ... MR64 Figure 5 5 Figure 5 5 Remote Loopback with Test Pattern RL TP Note Pressing NO when REMOTE LOOPBACK UNRECEIVED is showing on the LCD causes the EXIT TEST question to display DTE Interface DTE Test Pattern Generator TRANSMIT LOGIC RECIEVE LOGIC Test Pattern Detector LINE DRIVER LINE RECEIVER DDS Line Local Unit DTE Interface DTE DDS Line Remote Unit Bilateral Loopback LINE RECEIVER LINE DRIVE...

Page 50: ...1 bit test pattern over the DDS network to the remote unit The remote unit must either loop back the test pattern or generate its own test pattern to the local DDS MR64 for error checking Figure 5 6 Test Pattern TP DTE DTE Interface Test Pattern Generator TRANSMIT LOGIC RECEIVE LOGIC Test Pattern Detector Local and Remote Unit LINE DRIVER LINE RECEIVER DDS Line ...

Page 51: ...nnections on the remote unit If remote unit is set up properly report the problem of out of service code on the DDS circuit to the telephone company TM LED ON If the TM LED is on perform the following steps Ensure unit is in DATA mode and disable all DTE test functions Disconnect the DTE and Telco cables Toggle power on off on If TM light remains on refer to Chapter 9 Maintenance TM LED FLASHING I...

Page 52: ...S and OS LED s should be off TEST PATTERN OK should be displayed If TEST PATTERN ERRORS is displayed refer to Chapter 9 Maintenance LOCAL LOOPBACK TEST LL Using the front panel pushbuttons place the unit in LL All data sent from the local DTE is looped back to itself This will test the DTE equipment cable interface and local DDS MR64 If data is not the same refer to Chapter 9 Maintenance This test...

Page 53: ... TP SENDING PATTERN is displayed on the local unit until the remote unit is placed into RT If the remote unit does not respond the local DDS MR64 displays REMOTE LOOPBACK UNRECEIVED Otherwise TEST PATTERN OK or TEST PATTERN ERRORS is displayed on the local unit and REMOTE INITIATED REMOTE TERMINAL is displayed on the remote unit This tests local DDS MR64 DDS circuit and the remote unit If TEST PAT...

Page 54: ...Troubleshooting 6 4 DDS MR64 ...

Page 55: ... receive pair T gray R brown of unit A to the transmit pair T1 blue R1 orange of unit B Likewise connect the transmit pair of unit A to the receive pair of unit B Figure 7 1 Refer to Table 3 4 for pin assignments of the modular jack The T and R designations stand for Tip and Ring which is simply Tele phone Company terminology to distinguish between the two leads of a single pair For the DDS MR64 i...

Page 56: ...it is desired for the DTE connected to that unit to provide the timing using pin 24 of the DTE connector Figure 7 1 Connection as Limited Distance Modem Red Terminal block Spade Lug Twisted Pair Twisted Pair Screw terminal To modem Green Black Orange Brown Blue Gray Yellow TX Pair RX Pair POWER ON OFF 1 4 AMP S B DTE DDS 115 VAC 60 HZ 1 4 AMP F U S E FUSE F U S E 42A block EIA 232 25 pin connector...

Page 57: ... TESTS The master unit should not be put into RT LL or in a loopback using RL from the remote unit To do so will cause the circuit to lose its timing reference and errors will be created To test the circuit put the unit with DDS timing into any desired loopback mode and send test patterns from the master unit ...

Page 58: ...Non DDS Applications 7 4 DDS MR64 ...

Page 59: ...ate adapter option and the appropriate rate is selected FRONT PANEL DISPLAY During data mode the LCD displays the same messages as for the non rate adapting option with the following exceptions Operating Distance When the unit is running rate adapted 19200 bps 9600 bps or 1200 bps the maximum distance between units is determined by the line rate Refer to Table 7 1 for the maximum operating distanc...

Page 60: ...s NET TIME Network transmitter timing can be slaved to either DDS Received data timing for normal operation INTERNAL Timing for limited distance modem operation DATA TIME The rate adapter circuitry can be slaved to either INTERNAL Timing for normal operation EXTERNAL DTE provided timing Rate This option is the same as for the non rate adapter option except that while the rate adapter is enabled th...

Page 61: ...ing Repeated failure indi cates a more serious problem If this happens refer to the section on maintenance MAINTENANCE The unit provides maintenance free service Periodically it is necessary to remove dust that has collected on internal components Remove dust with a soft bristle brush and low pressure air or vacuum Before attempting diagnostic tests check that all connectors and plugs are firmly i...

Page 62: ...Maintenance 9 2 DDS MR64 ...

Page 63: ...ction Fuse protection is provided for the ac input The DDS MR64 is equipped with a 6 foot captive power cord INTERFACE TECHNICAL CHARACTERISTICS Transmit Pair Output Impedance 135 ohm 10 Output Pulse 50 5 duty cycle Output Amplitude 1 4 0 1V across 135 ohms 0 785 0 05 V at 9600 bps Output Power 6 dBm with 135 ohm load 0 0 dBm at 9600 bps Receive Pair Impedance 135 ohm 10 Input Levels 6 to 40 dBm ...

Page 64: ...Specifications A 2 DDS MR64 ...

Page 65: ...1 Cover removal of 4 12 CTS Clear to send 3 3 D Data mode 4 5 Data rate 4 2 7 1 Data rates asynchronous 1 1 synchronous 1 1 Data set ready 3 5 Data terminal equipment 3 1 interface 4 15 interface connector 3 1 3 5 DDS Digital Data Service 3 7 Description 1 1 Diagnostics 5 1 Digital data service non DDS applications 7 1 system interface 3 7 Dip switch 3 8 Dip switches location of 4 12 DSR Data set ...

Page 66: ...4 R Rate 4 2 RC Receive clock 3 5 RD Receive data 3 5 Receipt inspection 2 1 Receive data 3 5 Receive pair 7 1 A 1 Received line signal detector 3 4 Remote loopback 3 6 Remote loopback 4 3 6 2 with self test 6 3 Remote loopback with test pattern RL TP 5 5 Remote terminal loopback 5 1 Request to send 3 3 control option 4 3 Ring 7 1 RL Remote loopback 3 6 RLSD 4 4 Received line signal detector 3 4 R...

Page 67: ...nt panel initiated 4 6 Test mode 3 6 Test pattern 3 6 Test Pattern TP 5 6 Tests 5 1 7 3 Timing 4 2 non DDS application 7 2 Tip 7 1 TM Test mode 3 6 TM LED on 6 1 TP Test pattern 3 6 Transmit data 3 4 Transmit pair 7 1 A 1 Troubleshooting 6 1 V V 35 connector 3 2 Voltage 3 8 W Wire size 7 1 ...

Page 68: ... of the equipment requiring support recorded prompts will provide some assistance with this On site Service Activity or Status Access this feature to initiate an on site service call or to obtain the status or estimated time of arrival ETA for an existing on site request Equipment Installation Removal or Upgrade Use this feature to schedule the installation removal or upgrade of your Motorola prod...

Page 69: ...and an analog Bulletin Board System BBS to provide product information technical specifi cations new product releases and industry information to customers sales persons and distributors You can also use our BBS to post ques tions about products and their applications or to report any problems you may be experiencing To use the ISDN BBS make sure your B Channel speed is set to 56 kbps AT A4 1 DOCU...

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