6100 BSC Programming Manual

Contents

START/STOP OPERATION Request......................... 3-51

START/STOP TRACE Request and Response................ 3-53

WRITE Request and Response........................... 3-54

WRITEREAD Request and Response....................... 3-56

Status Codes and Details............................... 3-59

APPENDIX A: FILE SYSTEM ERROR CODES..................... A-1

APPENDIX B: BSC PROGRAMMING EXAMPLE..................... B-1

APPENDIX C: ASCII/EBCDIC CODE TRANSLATION TABLE......... C-1

INDEX.................................................... Index-1

FIGURES

1-1 Application Requests to the BSC Protocol Module...... 1-3

1-2 Primary and Secondary Stations....................... 1-6

1-3 Point-to-Point Links................................. 1-7

1-4 Basic Message Format................................. 1-9

1-5 Message with Heading................................. 1-11

1-6 Message Blocking..................................... 1-13

1-7 Transparent Text..................................... 1-17

1-8 ID Exchange.......................................... 1-20

1-9 Bidding for the Line................................. 1-22

1-10 Data Transfer........................................ 1-24

1-11 Line Turnaround...................................... 1-26

1-12 Normal EOT and Forward Abort......................... 1-29

1-13 "Please repeat that reply"........................... 1-31

1-14 Another Use of ENQ................................... 1-31

1-15 Uses of NAK.......................................... 1-33

1-16 Use of WACK.......................................... 1-35

1-17 Use of RVI........................................... 1-35

1-18 Limited Conversational Mode.......................... 1-38

1-19 Full Conversational Mode............................. 1-38

1-20 Breakdown of Line Configuration Parameters........... 1-41

2-1 Major BSC States and Transitions..................... 2-3

2-2 Completion Status to Leave DISCONNECTED STATE........ 2-5

2-3 Completion Status to Leave CIRCUIT ASSURANCE State... 2-9

2-4 Completion Status to Leave CONTROL State............. 2-12

2-5 Status Codes to Leave READ State..................... 2-17

2-6 Status Codes to Leave WRITE State.................... 2-20

2-7 Status Codes to Leave Multileaving State............. 2-23

2-8 Overlapping Line Turnaround with Processing.......... 2-27

3-1 Request Queuing...................................... 3-3

3-2 ID Exchange.......................................... 3-7

3-3 Line Bid............................................. 3-9