IBM 2702 Information Manual Download

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Summary of Contents for 2702

Page 1: ...describes the IDM 2702 2703 Transmission Control interfaces The processor interface description includes a description of the operating signals and responses The interface descriptions provide device...

Page 2: ...common frame grounding First Edition February 1968 Significant changes or additions to the specifications contained in this publication are continually being made When using this publication in conne...

Page 3: ...CE Panel 2 10 Message Restrictions 2 50 CE Panel Switches 2 10 Telegraph Terminal Control Type II Operations 2 52 CE Panel Indicators 2 10 Transmission Code 2 52 Metering 2 10 Special Charact ers 2 52...

Page 4: ...2 2 Clock Ring Indicators 2 8 2 3 Operator Panel Switches 2 12 2 4 Operator Panel Indicators 2 13 2 5 CE Panel Switches 2 14 2 6 CE Panel Indicators 2 18 iv ILLUSTRATIONS Figure Page 2 33 Special Char...

Page 5: ...IBM System 360 via an IBM 2703 Trans mission Control equipped with the appropriate Synchronous Features 2703 only IBM 2780 Data Transmission Terminal 2703 only IBM 1130 Computing System equipped with...

Page 6: ...IBM 1060 IBM 2712 IBM 1070 IBM 2740 or 2741 Figure 1 1 Data Communication Units Attachable to the 2702 2703 1 2 IBM 1130 2702 or 2703 o 1M I p e Processor IChannel r L _____ Connects only to 2703 Conn...

Page 7: ...ta Set 103A for operation at 134 5 bps on Common Carrier Switched Telephone or 150 baud TWX networks Or equivalent see Chapter 3 c Western Electric Data Set 103F2 for operation at 134 5 bps on Telepho...

Page 8: ...is required to interface with the telegraph line adapters controlled by this terminal control 1 4 Remote Switch Attachment Used with a System 360 Model 65MP or Model 67 to provide partitioning and the...

Page 9: ...trol Base Allows attach ment of a Telegraph Terminal Control Type I or Type II to the 2703 Telegraph Terminal Control Type I Enables the 2703 to operate with the AT T 83B2 83B3 Selective Calling Termi...

Page 10: ...into five classi fications 1 Line Speed Options 2 Auto Call 3 2712 Attachments 4 Two Processor Attach ment and 5 Isolation Line Speed Options These features provide the attachment of the various sync...

Page 11: ...ne per Line 1030 Data Collection System 1031A Input Station Telephone Compony Type 3002 600 bps IBM Terminal Control Type II Private Line Service or Privately Not Required Not Required IBM Line Adopte...

Page 12: ...equired Required Se lective Speed Conforming to SRL Manual A24 3435 IBM line Adapter for limited Distance Une Adapter I 4634 or 4638 Other Terminals AT T 8382 8383 Selective Telephone Company Type 100...

Page 13: ...See common carrier representative for type of dial ing facilities available Western Electric Western Electric 1200 bps Synchronous Clock Feature 202DI 202DI If Autocall feature is installed W E Autom...

Page 14: ...re Communication Facilities IBM Line Adapter 4612 Conforming to SRL Manual A24 3435 One per Line for Limited Distance Line Adapter II 1071 Control Unit Madel 2 Common Carrier Leased Four Wire IBM 3977...

Page 15: ...an be used 2703 1111 1111 Figure 1 4 Addressing Scheme 2 The specific address range available for assignment is 0 to 255 3 Anyone 2703 is limited to a maximum of 176 individual addresses or lines 4 Th...

Page 16: ......

Page 17: ...ment to CPU A When placed in the INACTIVE position this switch prevents CHAPTER 2 OPERATIONS the 2702 from becoming logically attached to CPU A If the 2702 is presently attached to CPU A the 2702 beco...

Page 18: ...ee Set Mode Enoble X Dial Disable X Release Reserve Uses Command Does not use Command 2702 only treated as No Op in the 2703 2703 only Two Processor Switch Feature only Auto Coli Feature onl y Station...

Page 19: ...rieved from the LCW of the communications line selected by the Test LCW Address switches With the Display Line Ctl Word switch in the A position the first 16 bits of the addressed LCW from each delay...

Page 20: ...AL 2712 TEST GROUP 1 2712 TEST GROUP 2 LOCAL IN CARR IER o IN CARRIER SYNC ON SYNC ON oe 00 OPERATE 0 0 REMOTE REMOTE LOCAL PARTITIONING I I r INTERFACE A B I I I I I I I ACTIVE ACTIVE 0 0 INACTIVE IN...

Page 21: ...QD REJ RUN CPLT P CHK CHK RI 0000000000000000 I7 6 5 4 3 2 1 o IL 4 2 L 4 2 SERIAL QAT FIE LD A BIT COUNT STROBE COUNT D D S LINE CONTROL WORD LOSe S IDATA TSMTIBIT SVC sca SC4 sci SCI DATA BUFFER o I...

Page 22: ...be selected to prevent channel interference when the 2702 power is turned on or off CE Test This switch activates all other CE switches described in the following paragraphs and is effective regard le...

Page 23: ...LCW Address switches Inh LCW Mod When depressed the Inh LCW Mod switch prevents any modification to the LCW addressed by the Test LCW Address switches The Inh LCW Mod switch is active only if the CE...

Page 24: ...ators are active when the Speed Exten sion or 31 Line Expansion feature is installed Wrap Chk This indicator lights during a wrap test if the character rroeived does not compare with the character tra...

Page 25: ...indicator alternately lights and extinguishes as the Single Cycle pushbutton is depressed This indicator is used to show the status of the test oscillator Wrap The Wrap indicator shows whether aCE wr...

Page 26: ...is lit when the enable latch in the selected line adapter is set 2 10 2703 OPERATOR S PANEL Figure 2 5 shows the 2703 operator s panel Operator Panel Switches The operator panel switches are defined...

Page 27: ...The 2702 03 usage meter runs when the Metering Out line from the attached processor is raised Table 2 7 defines the operation of the 2702 03 usage meter for the various partition situations This table...

Page 28: ...rtition switches Toggle This switch is provided only on 2703 s with a 2712 Attachment feature This switch is active for the 2712 Attachment feature selected by the 2712 SELECT switch The NORMAL positi...

Page 29: ...is reset with a pushbutton located on the ac control box in Gate B of the 2703 This indicator is ON when one of the power supply circuit breakers is tripped It is reset by resetting the tripped circu...

Page 30: ...ated by placing the METER switch on the operator panel in the OFF position Pushbutton This switch forces the scan of all addresses in core storage and loads the contents of the STORAGE BIT ENTRY switc...

Page 31: ...Word MDW l is loaded from the contents of the STORAGE BIT ENTRY switches 0 34 when data is requested by the selected line Pushbutton This switch used in conjunction with the SINGLE CYCLE switch wi II...

Page 32: ...Pushbutton This switch initiates a 5 120 to 10 240 ms reset All regi sters core storage de Iay Iines and control Iatches are reset Th is switch is active when the machine is in off I ine status as ini...

Page 33: ...R R I 8 ACK UP ADR RIa ACK UP IVC CTRL I r S JMC 5 RIC TIM N I ND I Mo 2 _ _ NO I I I I t I I I I r I I I I 1 I I I r I I I COMMAND REGISTER COMMAND ADDRUS EGISTER AL A HALT VAL CMND CHN cu eMND e D S...

Page 34: ...sampled bit is held in the Data Bit Register waiting for transfer to MCW l One indicator A l ll The Data Bit Register contains the bit received or the bit to be transmitted Five indicators A l l2 to A...

Page 35: ...tted data It is reset by the MACHINE RESET and TEST LCW RESET pushbuttons NOTE Dial indicators following are to be used only with the Auto Call Feature Four indicators A 2 7 to A 2 10 This register is...

Page 36: ...during a storage cycle This register is used only during Scan cycles and the following Ml and M2 cycles if necessary DAR SAR and CAR are also used to address storage Four indicators B 1 26 to B 1 29...

Page 37: ...ndicator B 3 18 Signifies that the line address being selected does not exceed the lower limit of the addresses assigned to the 2703 One indicator B 3 19 Signifies that the line address being selected...

Page 38: ...indicators B 4 4 and B 4 5 Indicates the number of data characters for each transfer up to four bytes that will occur across the interface Two indicators B 4 6 and B 4 7 Pertains to the actual number...

Page 39: ...the interface on a read or write type operation It also con tains the Status byte on a Status service cycle Eight indicators C 1 0 to C 1 7 This field is used for assembly and disassembly of low spee...

Page 40: ...nel in a receive opera tion One indicator C 1 32 This bit is set when the line has ending status to pass to the channel One indicator C 1 33 This bit has dual meaning When this bit is ON with the End...

Page 41: ...ansmit character from MDW 1 One indicator C 3 34 This bit will be ON when data is stored in MDW I NOTE The indicators on roller C 4 have the same definitions as those explained for roller C 3 and are...

Page 42: ...702 03 control unit portion being busy or in a machine reset condition Unit Check This signals the channel that the com mand is incapable of being executed This status byte configuration is dUEl to ei...

Page 43: ...e Holt I O was issued before attached data set establ ished attached data set establ ished the enable latch was turned a connect ion a connect ion on Non Switched network A Halt I O was issued before...

Page 44: ...fore the Halt I O was received before the enable latch was turned received Enable latch remains ON ON Enable latch remains OFF Disable The Halt I O was received after the enable latch was turned OFF C...

Page 45: ...ense command is issued The various bit positions within the byte are set by differ ent sense conditions as indicated in Figures 2 11 through 2 18 The sense information pertaining to the previous I O o...

Page 46: ...TTY 33 and 35 and 2741 with Interrupt Write I Data set power off 5 Break signal received applicable only for Write Command to 2741 2 Data set ON HOOK with Interrupt IBM TC Type I Prepare 3 Data set no...

Page 47: ...active command is being executed by the 2702 2703 when a new command Commands is issued b the channel A base check or core parity check has occurred 2703 Write Transfer check between the serialize fi...

Page 48: ...spoce at stop bit time Figure 2 15 Sense Bit 4 Data Check Part 1 SIS Binary Synchronous Terminal Control Read 1 CRC or lRC 2 VRC for ASCII Terminal Control 3 Incorrect control character sequence in T...

Page 49: ...the command was issued 4 Data Svc was on when Halt I o was issued 5 Channel issued Stop during Read Service operation Dial The data set is OFF HOOK The data set is OFF HOOK Present next digit rec d d...

Page 50: ...on or polling Enable Data set did not go OFF HOOK within 28 sec of issuance of Enable Inhibit Open line for 28 sec Any Transmit Line did not become transmit operational within 28 seconds except Wrap F...

Page 51: ...communications line No data transfer occurs The 2703 treats the Sadone command the same as an I o No Op command Sadtwo On accepting this control order the 2702 sets the TC field within the addressed...

Page 52: ...station address and the third being a count character any graphic The 2702 03 then generates a 2 36 and transmits the two address characters from the channel while buffering the count character It the...

Page 53: ...tablished by dialing or automatic answering and is recommended to prevent an auto answering conflict from a terminal The Enable command is not required to condition the line in a dial operation The Di...

Page 54: ...signal ends the line returns to Mark When a valid start bit is detected by a line instructed to Prepare a character is strobed off If at stop bit time the line is at Mark which indicates the line has...

Page 55: ...sage received from the polled ter minal is transferred to the channel until an SOH or STX character is received this character is last character transferred to the channel until an EOT character is re...

Page 56: ...he receiving station if no bits were lost in transmission Ip I0 1 2 3 4 5 6 Shift B A 8 4 2 1 I I Shift bit 0 lower case or 1 upper case inserted on receive operations or deleted on transmit operation...

Page 57: ...cted and in this case the command is ended with Channel End Device End and Unit Check status and the Data Check bit set in the sense field If is received while the line is in text in mode this charact...

Page 58: ...following the issuance of the Read com mand when the line control is in control mode the normal 28 second line timeout is pre empted by a 2 42 Read Write Read Write Text LRC n1 Text Out Control Read...

Page 59: ...ol mode It is normally followed by a polling character or addreSSing character End of Address EOA Indicates the end of address start of text and sets text out mode Receive The following characters are...

Page 60: ...smission Code r Bit position 0 automatically set to zero on Receive data p I0 B 6 o Notes The 1031 transmits the numeric zeros as on A bit only The 1033 receives the numeric zero as a C B 2 code and a...

Page 61: ...Converted to Interface Code Figure 2 29 shows the conversion between the I O interface code and the transmission code Interface byte position 2 represents the shift bit of the charac ter A one in the...

Page 62: ...audot Transmission Code StopiStopi Positions 0 I are automatically set to zero on a receive operation I O Interface Byte Position 2 represents the shift bit A one in psn 2 indi cates a character in FI...

Page 63: ...write operation is ended with Channel End Device End and Unit Check status A Read command must be issued to receive the message from the terminal Terminal to Processor The processor normally monitors...

Page 64: ...received from the I o interface When the 2702 03 2 48 detects a change in the shift bit between two char acters the terminal control inserts the proper shift character LTRS or FIGS between the two ch...

Page 65: ...erfoce Byte Position 2 represents the shift bit A one in position 2 indicates a character in FIGS shift A zero in position 2 indicates a character in LTRS shift Figure 2 32 Transmission Code Conversio...

Page 66: ...ss to receive 2 50 Note that if the CPU is to process or log the message the processor address must be the first address in the series of addresses sent by the ter minal If the first address received...

Page 67: ...RS TEXT IGS _______ LTRS EOM EOT Terminal Address Ltrs must be included when addressing an AT T 8383 Positive Response Ready to Receive EOA Message Sent EOM EOT Address of Western Unian Plan I 15A te...

Page 68: ...e eighth is the parity bit In addition each character has a single bit start element and a double bit stop element Thus eleven bits are transmitted for each character Example of character U in TWX Tra...

Page 69: ...11111111 01100000 Timeouts The normal 28 second line timeout is not pre empted by a shorter timeout period before the first char acter s start bit is received This timeout remains at 28 seconds BINAR...

Page 70: ...to Send CB Signals on this circuit are gen erated by the data set to indicate that it is prepared to transmit data The On condition on circuit CA Request to Send is delayed as long as maybe required...

Page 71: ...ure 3 1 Data Set Interface Start Stop C t Ircul Protective Ground AA Transmitted Data BA Received Data BB Request to Send CA Clear to Send CB External Data Set Data Set Ready CC Signal Ground AB Data...

Page 72: ...nominal bit time The following control lines when used are con sidered failsafe lines Request to Send CA Data Set Ready CC Data Terminal Ready CD The power off source impedance of the sending end of t...

Page 73: ...te Frame Ground Figure 3 3 Automatic Calling Interface Pin Number Circuit Function 1 FGD Frome Ground 2 DPR Digit Present 3 ACR Abondon Coli and Retry 4 CRQ Call Request 5 PND Present Next Digit 6 PWI...

Page 74: ...to detect the oscillator change and the Space signal The 2702 03 may sample a received bit during the sample time in the middle of the bit Considering this range of possible strobe times the bit must...

Page 75: ...Telegraph Line Adapter Dr 1 Figure 3 5 2702 Telegraph Line Adapter 3 6 Transmit Relay 48v 48v Protective Relay Telegraph Line Terminals...

Page 76: ...te Driver Sense Winding Figure 3 6 2703 Telegraph Adapter Transmit Relay 48v TTY Line Winding I I y 10 D C Resistance I Telegraph at connectors with Line contact closed I Terminal I Coil 10PFcap 1 MH...

Page 77: ...le Command I 19 4 0 0 1 Data Set Ready 0 I 19 4 sec min Data Carrier Detector 10 Write Command T j Xmit Data I Read Command I I j Disable Command ________________________ J Figure 3 7 2702 Data Set Li...

Page 78: ...ding an ending character to the 2702 and the Receive Data lead goes to a space state while carrier is decaying the space should start within x I bit time where x is taken from Table 3 1 The space cond...

Page 79: ...or Private Line Full Duplex Table 3 1 Length of Timeout Sequence for 2702 Read Type Commands Delay in Character Time of Received Character With 31 Line With Speed Without Speed Expansian Extension Eit...

Page 80: ...re 3 10 shows the output line characteristics for the Auto Call feature Voltage Limits 6 24V 5V Logical 0 5V Logical I 6 5V Output Current Drive This can drive a 3K load to ground at i 5 volts Delays...

Page 81: ...103 5362301 22 26 0 028 to 0 103 536302 28 32 0 026 to O 090 CHAPTER 4 EXTERNAL CABLING Electrical Specifications Voltage Ratings The maximum voltage rating of this connector is 24 volts ac or dc For...

Page 82: ...0 546 I 0 857 Mating Surface Front I 0 J 1 0 2 3 4 5 6 7 8 9 10 1112 13 2 3 4 5 6 7 8 9 10 111213 1 0 I B G 1 T o o 1 B Style Block Dark Gray with Threaded Insert Part 5353868 B Style Block Dark Gray...

Page 83: ...ation Insulation Support B Dimensions Crimp Barrel r O 6 1 Ski 0 028 0 004 6 2q s I rf C Mating Configuration Two Point Contact o b Two Point Contact Figure 4 3 Serpent Cont act 0 025 0 015 0 000 Exte...

Page 84: ...PO LOCATED CABLE CONNECTOR AT END OF BOX CPU 2 EPO CABLE CONNECTOR 14 CPU 1 EPO CABLE CONNECTOR 1032 DIGITAL TIME CONNECTOR 2703 REAR VIEW THIS AREA USED FOR COMMUN ICATlO N INTERFACE CABLES THE LOCAT...

Page 85: ...D J t 0 2 3 5 6 7 8 9 10 11 12 13 2 3 4 5 6 7 8 9 10 11 12 13 1 0 1 1 1 1 1 1 I I I B G 5353920 Figure 4 5 2702 03 to System 360 Cables Ext ernal Cabling 4 5...

Page 86: ...Cable PIN 5351178 Make Certain These Grounding Straps Are Connected View A A Figure 4 6 2702 03 EPa Cable 4 6...

Page 87: ...t To Send B04 4 Clear To Send B05 5 Data Set Ready B07 6 Signal Ground 008 7 Data Carrier Detector B08 8 Supervisory Transmit Dato B09 II Not Used BID 12 Not Used 010 14 Not Used 011 15 Not Used DJ2 1...

Page 88: ...hannel Wire No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Figure 4 8 Group 404 Domestic TTY 4 8 Cable B02 002 B04 004 B05 005 008 007 B09 009 810 010 812 012 813 013 I 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2...

Page 89: ...nt Jacks Resistor Shared Line Adapter To 2 Wire Local Channel loop BKO OY A 2 Wire Terminating Jack and Plug Wire Cable 1 Cable 2 Cable 3 Number Conn A Conn B Conn A Conn B Conn A Conn B 1 WH Red 004...

Page 90: ...12 Coble Coble No 2 No 1 J12 D12 G13 B13 G12 B12 J13 D13 G05 B05 J08 D08 J09 D09 Gl0 Bl0 G09 B09 Jl0 Dl0 J05 D05 J07 D07 Figure 4 10 Group 406 WTC Teletype Cable 4 10 IBM PIN 5269650 Coble No II Coble...

Page 91: ...Set A 2702 Conn Data Set B DI3 I JI3 I B02 2 G02 2 B03 3 G03 3 B04 4 G04 4 B05 5 G05 5 B07 6 G07 6 DOa 7 JOa 7 BOa a Goa a B09 II G09 11 BIO 12 GIO 12 DIO 14 JIO 14 DII IS JII IS DI2 16 JI2 16 D07 17...

Page 92: ...09 009 11 GIO Bl0 12 Jl0 010 13 G12 B12 14 J12 012 15 G13 B13 16 J13 013 Figure 4 12 Group 409 Domestic Teletype 2702 4 12 IBM PIN 5263745 16 15 14 13 15 13 16 14 16 15 14 13 15 13 16 14 Color Trocer...

Page 93: ...SERPENT uAIl SERPENT B SERPENT C SERPENT 011 SERPENT E SERPENT CONN CONN CONN CONN CONN CONN CONN CONN CONN CONN CONN HD XM1SS10N LINE FD XM1T B02 1 R BOS 1 R B09 1 R B12 1 R G02 1 R G05 HD XM1SSION L...

Page 94: ...2 O R 6 O R I 0 O R I 4IIJC 27 0 3 L IN E 3 O R 7 O R II O R 15 2703 LINE 2703 LINE 2703 LINE 2703 LINE 0 4 8 12 1 5 9 13 2 6 10 14 3 7 11 15 SERPENT liAr SERPENT IIB SERPENT IIell SERPEN IIDII CONN...

Page 95: ...I NE 3 OR I I TO TELEGRAPH B07 7 LI NE 3 OR II TO TELEGRAPH D07 8 LI NE 4 OR 12 TO TELEGRAPH B09 9 LI NE 4 OR 12 TO TELEGRAPH 009 10 LI NE 5 OR 13 TO TELEGRAPH BIO II LI NE 5 OR 13 TO TELEGRAPH 010 12...

Page 96: ...9 J3 2 6 JO J4 3 7 lJ J5 SERPENT All SERPENT IIBIi SERPENT lieII SERPENT IIDII CONN CONN CONN CONN CONN CONN CONN CONN B03 J D02 1 G03 J J02 1 DIGIT PRESENT B04 2 D03 2 G04 2 J03 2 ABANDON CALL AND RE...

Page 97: ...703 LineO or 2 2703 Line I or 3 f Part No 5150249 2703 Line 0 2 Serpent IIAII Conn Conn B02 I B03 2 B04 3 B05 4 B07 5 BOa 6 B09 7 BIO a BI3 14 002 15 DOS 17 006 16 007 19 009 20 010 21 012 24 Figure 4...

Page 98: ...tion to common carrier telegraph terminal board Used with feature 7895 5 Used for connection to a customer owned communication line Used with features 4612 and 4613 6 Used for connection to WTC 3945 L...

Page 99: ...5150071 8 IBM Line Adapter 2703 40 3 427 5150070 4 Data Set Auto Call 2703 40 4 428 5263702 I Data Set 2712 2703 40 5 429 5150249 2 Data Set Sync 2703 40 6 Notes I Total Cable Length of 100 feet for...

Page 100: ...2 35 Sadtwo 2 35 Sadzer 2 35 Search BSC 2 39 Search S S 2 38 Sense 2 29 Set Mode 2 35 Test I O 2 35 Wrap 2 37 Write 2 35 Commands Chart 2 2 Communication Facilities 1 6 Configuration 1 2 Control Mode...

Page 101: ...Sense Bit 3 2 31 X 2 Sense Bit 4 2 32 Sense Bit 5 2 32 Sense Bit 6 2 33 Sense Bit 7 2 34 Sense Command 2 29 Serpent Contacts 4 1 4 3 Set Mode Command 2 35 Special Characters ACK 2 52 AZ 2 48 Delete 2...

Page 102: ...wo Processor Switch 1 3 World Trade Telegraph Terminal Control 1 4 2702 Line Adapter on Private Line 3 9 2702 Line Adapter on Switched Network 3 5 2702 Operators Panel 2 1 2702 Operator Panel Indicato...

Page 103: ...nd the material Easy to read and understand c J c J Organized for convenient use c J c J Complete c J c J Well illustrated c J c J Written for your technical level c J c J o What is your occupation __...

Page 104: ...s of publications and for assistance in using your IBM system should be directed to your IBM representative or to the IBM sales office serving your locality Fold Staple Fold BUSINESS REPLY MAIL NO POS...

Page 105: ...ional Business Machines Corporation Data Processing Division 112 East Post Road White Plains N Y lOS01 USA Only IBM World Trade Corporation 821 United Nations Plaza New York New York 10017 Internation...

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