Envoy Application Programming Manual
Table Of Contents
- What’s New in This Manual
- About This Manual
- 1 Application Programming With Envoy
- 7 ADM-2 Multipoint Supervisor Protocol
- 8 TINET Multipoint Supervisor Protocol
- 9 Burroughs Point-To-Point Protocol
- 10 Asynchronous Line Supervisor Protocol
- A ASCII Character Set
- B ASCII to EBCDIC Code Conversion
- C File-System Procedures
- D Statistics Messages
- E S-Series Changes to Envoy
- NonStop™ Himalaya S-Series Server Architecture
- G-Series Migration Considerations
- CBSENSEON and CFSENSEON Modifiers
- LEOTRESYN and NOLEOTRESYN Modifiers
- Treatment of Characters After the Termination Character
- Number of SYN Characters
- DTR Drop
- Reporting of Parity Error
- Half-Duplex Support for Asynchronous Lines
- Controller Replacement
- SYSGEN and COUP
- Unit Numbers
- FDX Line Changes
- No Support for Auto-Call Unit
- Glossary
- Index
BISYNC Point-To-Point Protocol
Envoy Application Programming Manual—427159-001
3-40
Continuation WRITE Operation
Figure 3-8 shows the action of the local station using the SWIFT BISYNC Point-to-
Point protocol in response to line conditions on a continuation WRITE.
Figure 3-8. SWIFT Point-to-Point Continuation WRITE
Retry
Count = 0?
Error
= 173
Yes
No
Yes
Send Message
CALL WRITE...
2
Wait for Response
NAK
Recd?
Send ENQ
No
Error
= 177
Error
= 171
Timeout?
Retry
Count = 0?
No
No
Yes
Text Overrun?
Retry
Count = 0?
Yes
Yes
Yes
No
No
EOT Recd?
Error
= 163
Yes
RVI Recd?
No
Error
= 165
Yes
WACK Recd?
No
Yes
Retry 30
Times?
No
Error
= 174
Yes
020CDT .CDD
Incorrect
ACK?
Retry
Count = 0?
Retry
Count = 0?
Proper
Protocol?
ENQ Recd?
Correct
ACK?
Error
= 172
Error
= 175
Error
= 0
No
No
No
No
Error
= 166
Yes
No
Yes
Yes
Yes
Yes
No
No
Retry 3
Times?
No
Yes