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
ADM-2 Multipoint Supervisor Protocol
Envoy Application Programming Manual—427159-001
7-35
Initial READ Operation
Table 7-11 lists the error codes that can occur during a initial READ operation.
Continuation READ Operation
Figure 7-7 shows the action of the supervisor station in response to line conditions on a
continuation READ.
Table 7-11. Initial READ Error Codes
Error Code Description
171 No response to poll
172 Reply not proper for protocol
173 Transmission error
176 Poll sequence ended with no responder
177 Text overrun
Figure 7-7. ADM-2 Multipoint Supervisor Continuation READ
Yes
Yes
048CDT .CDD
No
EOT
Received?
Text
Overrun?
Yes
No
CALL READ...
Wait for Response
Timeout?
Send ACK
1
Error = 172
See Initial READ
Error = 162
Error = 177
No
Protocol
Error?
Yes