Wang 2228D, Maintenance Manual

Page 1: ...OPERT OF WANG l AHORATORlt S INC INFORMATION l ONTAINt D HEREIN IS l ONSIUt Rrn l OMPAN PROPRIF T R INFORMATION ANll ITS 1 st IS Rt STRll HD SOI EL TO THE Pl RPOSE OF ASSISTINC Oli IN SER l IN WAN PRO...

Page 2: ...MWARE DESCRIPTION 2 3 MODEMS 2 3 MODEM INTERFACE RS 232 C 2 4 MODEM INTERFACE RS 449 C 2 5 COMPATIBLE MODEMS 2 7 SECTION 3 HARDWARE THEORY OF OPERATION INTRODUCTION 2228D TELECOMMUNICATIONS CONTROLLER...

Page 3: ...RESET STROBE 3 16 DATA INPUT LINES END SIGNAL CPB SIGNAL AND BS STROBE 3 16 DATA OUTPUT LINES RDY SIGNAL OBS STROBE AND CBS STROBE 3 16 ADDRESSING THE 2228D CONTROLLER 3 16 RESETTING THE 2228D BY THE...

Page 4: ...HECKLIST ITS 1 EIA INTERFACE TEST SET MODEM CONTROL SIGNAL CHECKOUT MODEM SELF TESTS DATA SET 201C SELF TEST 6 1 6 1 6 2 6 4 6 6 6 7 BUTTONS ON DATA SET 6 7 STATUS LAMPS ON THE DATA SET 6 7 DATA SET T...

Page 5: ...I0N App ndix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J APPENDICES Related Documentation Schematic Drawings Bill of Materials BOM RS 232 C Loo...

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Page 7: ...roller is organized in the following manner Section 1 Section 2 Section 3 1 1 INTRODUCTION This section provides the reader with the scope and organization of the 22280 TC Controller manual DESCRIPTIO...

Page 8: ...ecessary information for installing the 22280 TC Controller is supplied in this section This includes initial set ups switch settings installation and interconnection with modems 1 2 TROUBLESHOOTING B...

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Page 10: ...ce the 22280 will also provide a RS 449 C interface via a 37 pin male connector Either the RS 232 C or RS 449 C interface is selected by the user via a toggle switch The modem interface toggle switch...

Page 11: ...ACE CONNECTOR N w UI c m c CD SWITCH 1 SET FOR RS232 INTERFACE CONNECTOR WITCH 2 SET FOR NORMAL OPERATION OFF OFF OFF OFF OFF OFF OFF OFF PROM L44 LED RS 449 C CONNECTOR CC J N C m w c f c UI RS 232 C...

Page 12: ...RE DESCRIPTION Refer to the 3271 SOFTWARE EMULATION INSTALLATION MANUAL for information concerning 2228D software 2 4 PRODUCT FIRMWARE DESCRIPTION The 2228D TC Controller power up diagnostic is factor...

Page 13: ...er end not a 201A 208B 202C or 202S The modems listed in Appendix J or their equivalents may be used 2 5 1 MODEM INTERFACE RS 232 C The controller conforms to the nationally recognized EIA RS 232 C an...

Page 14: ...emote loopback testing and other control functions missing in RS 232 C The federal government has resently adopted RS 449 C as a federal standar Therefore RS 449 C is expected to come into widespread...

Page 15: ...INTERFACE B UNBALANCED CONFIGURATION RS423 FIG 2 RS449 INTERFACE CIRCUIT CONFIGURATIONS w 5000 2 4 89 6 I I I 56 I 4000 i 1000 200 100 50 40 I I I I Rs2 32 t1 t Rs423 NOMINAL LIMIT I I I UNBALANCED I...

Page 16: ...ver offers better circuit performance in terms of distance and data rates transmitted The maximum transmission rates supported by RS 422 C and RS 423 C circuits differ with circuit length as shown in...

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Page 18: ...uilt It requires a single 5V power source and a single clock frequency which in this case is 12 24 MHz The chip uses a 16 bit address bus and an 8 bit data bus for bi directional data flow A reset lin...

Page 19: ...K ZZZZZ6 BIT zoATA BUS ZY 7 J 1 1 I t1 L z 7 I L L LL RNi IT vI EVEN I t1 cs10121 PARITY ERROR PAR1n vI SERIAL INPUT lL OUTPUT l H v 4 CHANNELll V 1_ _ g gtA7 L V lr 19 1DRD2 ORO 3 AEN UPPER y J EOP...

Page 20: ...able NMI input signal the DLP when a parity error occurs The maskable INT signal serves as the interrupt input for all other interrupt causing devices in the system and is under software control The Z...

Page 21: ...Channel 2 Address Reg OMA Channel 2 Address Reg X 15 I OMA Channel 2 Word Count Reg DMA Channel 2 Word Count Reg X 16 I DMA Channel 3 Address Register OMA Channel 3 Address Reg X 17 I DMA Channel 3 Wo...

Page 22: ...oth the Output Channel A and PIO Input Channel B A counter for character interrupts SIO Receiver Channel A A dedicated software timer on channel 3 and an extended software timer feature that starts on...

Page 23: ...ne 3 Timer None None 3 1 5 SYNCHROUNOUS INPUT OUTPUT SIO CHIP AND MODEM RS 232 C INTERFACE The RS 232 modem connector is interfaced through a SIO chip which also supports an internal loopback diagnost...

Page 24: ...el A Transmit Clock CTC channel 1 Clock Output SIO channel B Carrier Detect RS 232 pin 6 Data Set Ready SIO channel B Receive Data SIO channel A Transmit Data SIO channel B Receive Clock CTC channel 1...

Page 25: ...pins 12 30 Terminal Ready SIC channel B Data Terminal Ready RS 449 pins 7 25 Request to Send SIO channel B Request to Send SIO channel B Clear to Send RS 449 pins 9 27 Clear To Send SIC channel B Tran...

Page 26: ...nition to signal a character interrupt during synchronous operation of the SI0 2 A on the receiver channel The databus will provide the RAM chip addres S Address bit AO from the Z80A is wired to the d...

Page 27: ...he controllers memory and 4 From the 2200 I O bus through the ZBOA PIO chip to the controller s memory The OMA request input lines are to be programmed for active high The DMA acknowledge outputs are...

Page 28: ...e I O port address assignments to the AMD s 9517 OMA chip is shown as follows PORT OUTPUT PORT DESTINATION INPUT PORT SOURCE X 10 I OMA ch 0 address register DMA ch 0 address register XI 11 I DMA ch 0...

Page 29: ...id however because its function is to gate data from the selected sense amplifier to the data output circuitry Since the column selection information is not used internally until well after the row se...

Page 30: ...inimum hold time to allow the chip s sense amplifiers to complete the column address detection process and to allow the associated read write operation for the resultant location To achieve the specif...

Page 31: ...arity to the databus An OUT 71 instruction executed by the Z80A will force a one on the 9th bit of a even number of ones pattern thus causing a parity error for even parity The parity error will then...

Page 32: ...ERFACE The major features of the 2228D interface to the 2200 are 1 The 2200 may hard reset the 22280 under program control as can the 2228B see 3 7 1 2 The 2228D can interrupt the 2200 under microcode...

Page 33: ...strobe The ENDI signal whose value is determined by the output port is latched by the 22280 when a data byte is outputted to the PIO As used by the 22280 it signals end of block when set 3 6 4 DATA OU...

Page 34: ...al is set equal to the request 1tatus bit 3 7 1 RESETTING THE 22280 BY THE 2200 Like the 2228B the 22280 is not reset by the 2200 reset strobe signal It is reset under program control by the 2200 when...

Page 35: ...channels and 2200 input output bus as shown DESTINATION SIGNAL SOURCE SIGNAL PIO channel A strobe 2200 CPB Signal is off Primary select is on PIO channel A ready is on 2200 IBS Strobe PIO channel B st...

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Page 37: ...ble WLI 220 0113 which is needed for modem connection 4 1 2 PROM REVISION LEVEL CHECK Check the PROM for a recent updating of revision level Up to the date of this writing PROM chip L44 WLI 378 4219 s...

Page 38: ...witch for selection of the RS 232 C interface B SIO Bisync External Internal Test Option Switch SW 2 The Test Option Switch SW 2 is not utilized during normal operation all slide switches OFF refer to...

Page 39: ...evice address should then be set to 1F Set slide switches 1 2 3 4 and 5 to ON set 6 7 and 8 to OFF 4 1 4 2228D INITIAL INSTALLATION Turn the CPU ac power switch OFF and install the 2228D TC Controller...

Page 40: ...the loopback plug if inserted from the RS 232 C connector c Remove the 2228D TC Controller board from the 2200 CPU chassis d Set the Test Option Switch SW 2 to OFF all slide switch OB F e R install th...

Page 41: ...ft the followlng optional cables are available Wang Part Number Length RS 449 C RS 232 C 25rt 120 2325 01 220 0219 50ft 120 2325 02 220 0220 100ft 120 2325 03 NIA 250ft 120 2325 04 NIA 500ft 120 2325...

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Page 43: ...the mounting bracket see Figure 1 will give one of the following three indications A LED EXTINGUISHES BOARD PASSED The LED extinguishes within 10 to 15 seconds after powering up This indicates that a...

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Page 45: ...ons system 6 2 TROUBLESHOOTING CHECKLIST The first thing any service representative should do is to check the installation items as follows a Check the entire 2200 system by running the SYSTEM LEVEL D...

Page 46: ...the host computer can support only single record blocks in that case a change in the Wang Software is required to accomodate host computer compatibility h Get in touch with data processing personnel a...

Page 47: ...itor signals originating from the modem are also located on the upper half of the front panel Likewise the lower half of the Test Set contains a connector to which the DTE Terminal or CPU can be conne...

Page 48: ...ignals can be checked using an oscilloscope or an EIA Interface Test Set which provides test points and LED s that indicate signal activity The modem must be in the data mode when checking the control...

Page 49: ...rting data transmission 6 Pin 5 CLEAR TO SEND FROM data set Signal on this circuit is generated by data set to indicate whether or not data set is ready to transmit data This circuit is turned ON 3v t...

Page 50: ...this circuit at 2000 HZ 2000 baud modem or 2400 HZ 2400 baud modem or 4800 HZ 4800 baud modem rate is used to provide the data terminal equipment with receiver signal element timing information The tr...

Page 51: ...ects the output of the local transmitter to the input of the local receiver ST Self Test When depressed this button causes the data set transmitter to turn on and transmit fixed pattern RT Remote Test...

Page 52: ...when the CO lamp is on the RS lamp will be off regardless of the status of the RS signal at the customer interface CS Clear to Send This lamp monitors the status of the carrier on signal on the custo...

Page 53: ...and ST switches Requirement All lamps except MC are lighted during a 30 second testing interval If the MC lamp blinks or remains steadily ON or if any of the other lamps are extinguished the data set...

Page 54: ...nt TM lamp extinguishes 6 5 2 DATA SET 2088 SELF TESTS 6 5 2 1 BUTTONS ON THE DATA SET Six buttons are located on the front panel of the data set All of these except the LP button are push to operate...

Page 55: ...m a Telephone Company Data Test Center DTC 50 Button When depressed this button provides a request to send clear to send interval of 50 millisecond ms When the button is released the request to send c...

Page 56: ...f the status of the RS signal at the customer interface CS Clear to Send This lamp monitors the status of the clear to send signal on the customer interface during both the normal and test modes of op...

Page 57: ...dition to the followlnp tests the Telephone Company Test Center perHonnel may request further armlstance In trouble i solatlon by use of hullt in features j 11 LAMP TEST Deprm1 1 hf l P nonlockinp but...

Page 58: ...upply the power cord must be unplugged and replugged into the ac outlet If the data set still fails the Analog Loopback Self Test notify the Tele phone Company Repair Service for correction of the pro...

Page 59: ...d after transferring to the data mode the system has failed the End to End Self Test O serve the ER lamp for a 5 minute period The ER lamp should be off and should not blink more than an average of th...

Page 60: ...lows 8 Release the ST button at your data set Data set is returned to normal operation 9 Request the far end to release the ST and RO buttons Far end data set is returned to normal operation NOTE If t...

Page 61: ...al Test 6 6 2 RS 232 C Loopback Test Once the RS 232 C Loopback plug is installed into the RS 232 C connector the RS 232 C Loopback Test can be performed This test is only performed during initial ins...

Page 62: ...Code Interpreter program is used only if the LED is FLASHING reportable failure 6 6 3 2 PROGRAM DESCRIPTION The Power Up Error Code Interpreter program is designed to test the LSI circuitry needed for...

Page 63: ...Load diskette into Floppy Disk B Select that Disk drive containing the diagnostic diskette using the SELECTS DISK statement c D F G H G Depress RETURN Depress LOAD Depress RUN Depress T and enter in...

Page 64: ...IS THE ADDRESS OF THIS CONTROLLER KEY RETURN TO CONTINUE ADDRESS IS NOT WITHIN SPECIFIED RANGE LINE 3 Will be visible upon entry of incorrect address B PROGRAM IDENIFICATION This routine is entered a...

Page 65: ...DEVICE ADDRESS 01C DEVICE IS READY I KEY RETURN TO CONTINUE D ERROR STATUS REQUEST This routine is entered from the Key RETURN of the previous IV B 2 M screen During this routine an interim screen is...

Page 66: ...ge 6 27 for PIO 2200 OB S and B S screen display REPLACE PCB WLI 210 7659 BANK DECODER TEST ERROR ERROR CODE RECEIVED 02 KEY RETURN TO TEST PIO 2200 OB S AND IB S REPLACE BAD 4116 RAM CHIPS 16K X 1 WL...

Page 67: ...BOARD DISPLAY OF ERROR SCREEN DISPLAY OF BOARD IS A GRAPHIC RAM CHIP LAY OUT WITH THE BAD RAM OR RAMS POSITIONS IDENTIFIED Screen display 80 40 20 10 8 4 2 1 p 1 B BANK I l I I I A 0800 TO 1 r I l I D...

Page 68: ...AND IB S ERROR CODE 05 REPLACE P1 B WLI 210 7659 Screen display CONTROLLER FAILED DMA CURRENT AND WORD COUNT REGISTER TEST ERROR CODE RECEIVE 05 KEY RETURN TO TEST PIO 2200 OB S AND IB S ERROR CODE 06...

Page 69: ...E 10 REPLACE PCB WLI 210 7658 Screen display IV B 2 M CONTROLLER FAILED SIO BISYNC EXTERNAL LOOP BACK TRANSMIT RECEIVE TEST ERROR CODE RECEIVE 10 KEY RETURN TO TEST PIO 2200 OB S AND IB S ERROR CODE 1...

Page 70: ...CEIVED 08 KEY RETURN TO TEST PIO 2200 OB S AND IB S ERROR CODE 09 REPLACE PCB WLI 210 7659 Screen display NMI OCCURRED DURING NORMAL OPERATION FROM BOOTSTRAP ALL POWER UP DIAGNOSTICS PASSED UPON RETRY...

Page 71: ...BLE TO COMMUNICATE WITH CONTROLLER NOTE If the above screen appears take the following actions TV R 2 M 1 Re load program section 6 6 3 3 of the power up diagnostics 2 If screen re appears replace 222...

Page 72: ...the previous pattern entered will be returned and the controller will remain in the error reporting routine This board is considered untestable until the present memory problem is corrected If any err...

Page 73: ...xt question will appear which asks the operator if the LED is Flashing If the operator answers N indicating the LED is ON solid an error screen will be displayed and no further testing will take place...

Page 74: ...c Program is stored on the 702 0097 Floppy Diskette under file names 28DFSR1 and FSDIAGS respectively 6 6 4 4 PROGRAM LOADING PROCEDURE A Load the diskette into the floppy drive B Select that disk dri...

Page 75: ...ICE DIAGNOSTIC FOR 12228 REV 1 ONL KEY RETURN TO CONTINUE B DEVICE ADDRESS SELECTION This screen requests the operator to input the correct device hex address for the controller 01C or 01F located on...

Page 76: ...ires MVP BASIC Revision 1 9 01C 01F hat is the device address 01C depress RETURN for Ready condition DEVICE IS READY KEY RETURN TO CONTINUE NOTE A busy response indicates either the device address is...

Page 77: ...y Device address 01C will be used for all tests Is the LED OFF Y or N Y depress RETURN to continue NOTE The communications test is only run upon initial entry of this diagnostic or upon a re start req...

Page 78: ...e 2228D TC Controller board LED FLASHING INDICATION error screen Screen display Device adrlress 01C will be used for all test Is the LED OFF Y or N N Is the LED FLASHING Y or N Y The power up diagnost...

Page 79: ...bit multiplexer for the DMA chip A unique byte is placed in each of the memory locations shown below Then each unique byte is read at the specific address and checked with the expected byte Successful...

Page 80: ...EST PASSED G SECOND COMMUNICATIONS TEST This screen displays the conditions of the second communications test Any errors will be reported on this screen and error looping will be automatically invoked...

Page 81: ...to display instructions Y or N Y depress RETURN Instructions will be displayed ow many passes do you wish to make less than 10000 4 depress RETURN All tests will make 4 pass es KEY RETURN TO CONTINUE...

Page 82: ...s memory and that the controller has been sent to this program and is awaiting test requests from the monitor Screen display TEST SELECTION MENU SF 0 RE KEY INPUT PARAMETERS SF 1 MOVING INVERSIONS MEM...

Page 83: ...INPUT PARAMETERS The Input Parameters Request screen is displayed as seen on page 6 37 This routine allows the operator to re input the Loop On Error or Halt On Error Instruction Information Display a...

Page 84: ...test will run a more complete RAM check and is bank selective In the hain Mode bank selection will be an automatic function KEY RETURN TO CONTINUE Second screen display MOVING INVERSIONS TEST RAM MEMO...

Page 85: ...RSIONS TEST PASSED CONTROLLER IS BACK IN HOST depress SF2 SIO EXTERNAL LOOP This test requires the RS 232 C Loopback plug be installed into the RS 232 C connector The test runs a more extensive test o...

Page 86: ...d in all 3 modes ie Async Bisync and SDLC In addition 3 vectored interrupt tests are performed Transmit Receive Overrun CTS DCD KEY RETURN TO CONTINUE Second screen display ASS 1 SIO EXTERNAL LOOP WAI...

Page 87: ...ransfer completion A time out feature is also tncorporated in case no transfer operation takes place as expected indicating an SIO DMA problem exists First screen display SIO DMA TEST his test require...

Page 88: ...o recognize any characters With the SIO and DMA Receive channel only activated 256 characters 00 to FF are transmitted and received The CTC is monitored as well as the DMA checking each character that...

Page 89: ...ailing character is interpreted as the RAM address INSTALL RS232 LOOP BACK KEY RETURN TO CONTINUE Second screen display PASS 111 CONTROL CHARACTER RECOGNITION RAM TEST WAITING FOR CONTROLLER TO COMPLE...

Page 90: ...ly It also insures the priority scheme with the SIO having the highest and the PIO the lowest is maintained First screen display PRIORITY INTERRUPT TEST his test checks the IEI and IEO line between th...

Page 91: ...for this test also the Modem Int rface Toggle Switch on the rail must be in the RS449 position The tests performed are the same as those performed by the SIO EXTERNAL LOOP Test First screen display RS...

Page 92: ...ACK IN HOST depress SF7 OPTION SWITCH TEST This test allows the operator to test SW2 on the controller motherboard WLI 210 7658 After test entry the screen will display the current switch setting The...

Page 93: ...ts the switch to the desired switch setting which will automatically be updated on the screen To exit the routine the user must key RETURN KEY RETURN TO CONTINUE Second screen display OPTION SWITCH TE...

Page 94: ...sses is selected by the operator each bank of memory will be tested once by Moving Inversions NOTE The asterisk designates those tests which are performed by the Chain Mode Test depress SF8 Screen dis...

Page 95: ...Y RETURN TO CONTINUE NOTE Upon depressing RETURN the Chain Mode Test will automatically perform the tests designated be the asterisk on the Test Seleotion Menu RESTART This entry forces a software res...

Page 96: ...1 _ J g __ ___...

Page 97: ...Pub 41103 Bell Pub 41105 Bell Pub 41201 Bell Pub 41202 A 1 Technical Reference Catalog Technical Reference Ring Binder Complete Set Of Data Communication Technical References Data Communications Using...

Page 98: ...cation Data Set 209A Interface Specification Data Set 212A Interface Specification Data Service Unit Interface Specification Data Auxiliary Set 801A Automatic Calling Unit Data Auxiliary Set 801C Auto...

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Page 100: ...THE SCHEMATICS WHEN AVAilABLE ARE ON THE lAST CHE IN THIS SET...

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Page 102: ...SWITCH SLIDE SPST R PCS OIL RES 120 OHM 1 4W lOX FIXED COMP RES 120 OHM 1 4W lOX FIXED COMP RES RES lK OHM 1 4W lOX FIXED COMP lK 0H 1 1 4W lOX FIXED COMP RES 2 2K OHM l 4W lOX FIXED COMP RES 2 2K OHM...

Page 103: ...STEMS LABOq QUALITY CONTROL 1 UF 50V BD 20X CERAMIC CAPCHJFRQ l UF CERAMIC CAPACITDRIHIGH FREQ CAP 047 UF 50V A0 20X CERAMIC MLD CAP 2 2 UF 20 V OX TANT AXIAL CAP 2 2 UF 20V lDX TANT AXIAL T R CAP loO...

Page 104: ...IT E PROM loOOOO EACH 2 IN H7 0363 2102 A2 lK BY 1 BIT STATIC RAM 250N E15283 lo 0000 EACH 2 IN 377 388 IC A 19517A1PC DIRECT MEMORY ACCESS 15283 lo 0000 EACH 1 IN 220 0113 2200 TC CABLE 482 5 l oO oo...

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Page 106: ...E DATA 103 161 REQUEST TO SEND 1041 I 1171 RECEIVE CLOCK CLEAR TO SEND 051 1181 DATA SEND READY 06 1191 1071 120 DATA TERMINAL READY 1 CARRIER OB 1211 1091 JUMPER LOCATIONS 122 Pin to Pin 110 I 2 3 12...

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Page 108: ...I 7 3 4 8 26 8 4 8 I 7 3 1 4 27 I 7 3 I 9 8 I 7 3 I 4 8 28 I 7 3 10 4 8 I 7 3 I 4 8 29 9 7 3 5 11 4 8 I 9 7 3 5 l 4 8 30 9 7 J 5 12 4 8 t 7 3 I 4 8 31 7 3 1 13 4 I 7 3 I 32 I 7 3 I 14 7 3 l 33 I 7 3...

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Page 110: ...known power up conditions of the PIO chip It also exchanges data patterns with both port output registers to insure they will hold data Testing is limited to this since all pins of the PIO chip cannot...

Page 111: ...00 and FF patterns due to the Data line etch layouts closeness in proximity 7 The DMA 9517 chip is checked if RAM passes to determine whether power on conditions were met It is also tested to see if t...

Page 112: ...EX 01 in the option switches of the motherboard Failures result in either the LED remaining ON SOLID or FLASHING if the LED is FLASHING this indicates a reportable failure If the LED is ON SOLID this...

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Page 114: ...j B C D E F 0 A J 0 1 4 t 11 t i t t R 2 STX DC2 D E 3 ETX DC3 R 4 H E 5 HT NL LF x 6 ETB D SYN b k s c 1 t d m u e n v f 0 w B K S 2 C L T 3 D M U 4 E N V 5 F 0 W 6 I 7 ESC EQT g p x G l 1 t r r t G...

Page 115: ...Idle 3270 Control Characters DUP Duplicate EM End of Medium EUA Erase Unprotected to Address FF Form Feed FM Field Mark IC Insert Cursor NL New Line NUL Null PT Program Tab RA Repeat to Address SBA Se...

Page 116: ...CK 0 ACK 1 DLE EOT RV TD WACK G 3 Positive Acknowledgement 0 DLE X 70 Positive Acknowledgement 1 DLE Disconnect Sequence for a Switched Line Reverse Interrupt DLE Temporary Text Delay STX ENQ Wait Bef...

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Page 118: ...2280 12 SCF 122 Secondary Rec d Line Sig Det Modem e 13 SCB 121 Secondary Clear to Send Modem 14 SBA 118 Secondary Transmitted Data 2228D 15 DB 115 Receiver Signal Element Timing Modem 16 SBB 119 Seco...

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Page 120: ...Receive Ready RR Modem 14 Remote Loopback RL 15 Incoming Call IC Modem 16 Select Freq Signal Rate Select SF SR 17 Spare TT 18 Test Mode 19 Signal Ground SG 20 Incoming Call IC Modem 21 Terminal Timing...

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Page 122: ...APPENDIX J BELL MODEMS TELECOMMUNICATIONS SUPPORT J 1 IV B 2 M...

Page 123: ...ocessnrs using TC 3 TC WS TC B2 TC 8 TC 81 STANDARD MODEM DECISIONS FOR COMPATIBILITY WITH WANG SYSTEMS COMMENTS 1 EIA Interface A1 Note 1 2 Contace Interface 3 Alternate Voice 83 Customers Choice 4 W...

Page 124: ...Y WITH WANG SYSTEMS COMMENTS A B c D E F 1 transmitter internally timed 2 transmitter externally timed 3 continuous carrier 4 switched carrier 5 switched request to send 6 continuous request to send 7...

Page 125: ...c D E F STANDARD MODEM DECISIONS FOR COMPATIBILITY WITH WANG SYSTEMS 1 Sena space disconnect A1 2 No Send space disconnect 3 Receive Space Disconnect B3 4 No Receive Space Disconnect 5 Loss of Carrier...

Page 126: ...COMPATIBILITY WITH WANG SYSTEMS A B c D E F 1 Local copy on primary channel 2 no Local copy on primary channel 3 local copy on reverse channel 4 No local copy on reverse channel 5 Telco engineered ti...

Page 127: ...channel A1 See NOTE no Local copy on primary channel local copy on reverse channel No local copy on reverse channel B4 Telco engineered timing options C5 customer engineered timing options Telco engi...

Page 128: ...R COMPATIBILITY WITH WANG SYSTEMS COMMENTS A B c D E 1 factory supplied disconnect options 2 customer selected disconnect options 3 automatic answer yes 4 automatic answer no 5 factory supplied EIA in...

Page 129: ...OMMENTS A 1 Transmitter Timing Internal A1 2 Trc nsmitter Timing External B 3 Automatic Answer not provided 4 Automatic Answer controlled by B4 DTR only c 5 Ring indicator on EIA interface C5 pin 22 6...

Page 130: ...Word Processors using TC 3 TC WS TC 82 TC B TC B1 STANDARD MODEM DECISIONS FOR COMPATIBILITY WITH DECISION WANG SYSTEMS COMMENTS A 1 Transmitter Internally Timed Al 2 Transmitter Externally Timed B 3...

Page 131: ...62B or 2228C For Wang Word Processors using TC 3 TC WS TC B2 TC B TC B1 STANDARD MODEM DECISIONS FOR COMPATIBILITY WITH WANG SYSTEMS COMMENTS Transmitter Timing by Data Set A1 Transmitter Timing by Da...

Page 132: ...set after DSS on ACR timer stopped after DSS on 6 ACR timer not stopped after DSS on 7 End of number signal from Customer terminal 8 No end of number signal from customer terminal See Note SELECT DECI...

Page 133: ...signal from customer terminal see Note 2 No end of number signal from customer terminal see Note 2 9 Line transfer after ACU answer tone detection R01C4 only 10 Data set answer tone detection without...

Page 134: ...imer stopped after DSS on ACR timer NOT stopped after DSS ON Longest ACR timing interval ACR timing interval specified by customer SELECT DECISION A1 B4 C5 Note 1 If second dial tone detection is requ...

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Page 136: ...Schematic No 210 7658 210 7659 APPENDIX B SCHEMATIC DRAWINGS Title motherboard daughter B 1 IV B 2 M No of Sheets 5 4...

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