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
Asynchronous Line Supervisor Protocol
Envoy Application Programming Manual—427159-001
10-21
Line-Error Handling
Figure 10-3. Asynchronous Line Supervisor READ Operation
056CDT .CDD
No
CALL READ...
Wait for response
No
Error = 177
Error = 173
Timeout?
Error = 120
Yes
Yes
No
No
Error = 171
Yes
Error = 0
Error = 21
Read count
too large ?
Receiver enabled
Text
received?
Error = 0
READ only?
No
Data parity
error?
Text with
error?
Text
overrun?
Text
received?
Yes
Yes
Yes
Yes
No
No
Yes