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
7-40
Poll and READ Operation
Poll and READ Operation
Figure 7-9 shows the sequence involved in polling the network and reading a message
from a terminal.
Figure 7-9. ADM-2 Multipoint Supervisor Poll and READ Example
050CDT .CDD
Application Process Network
Start
OPEN the Line
Poll
Continuously
(READ)
Message is
Processed
Reply is Sent
to Terminal 2
CALL
DEFINELIST
Operator
Presses SEND
PAGE Key on
Terminal 2
See Selection
Example
Terminal
Responds to
Poll with
Message