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
TINET Multipoint Supervisor Protocol
Envoy Application Programming Manual—427159-001
8-12
Polling Type
The READ completes either when a terminal responds to the poll with a message or
when a line error is detected. If a terminal responds with a message, the entry number of
the terminal in the poll list is returned in linebuf.8:15 (for more information, see
Message Formats
on page 8-18). The message is also returned in linebuf, and a
condition code of CCE is given. If a line error is detected, the entry number associated
with the last terminal to be polled is returned in linebuf.8:15 and the READ completes
with a CCL indication.
Noncontinuous Polling
Noncontinuous polling occurs for a specified number of passes through the poll list or
until a terminal responds to the poll with text or until an error occurs. Noncontinuous
polling operates in the same manner as continuous polling except that the number of
passes through the poll list is limited. The limit is specified through the poll-type
parameter of the DEFINELIST procedure or the function parameter of the
CHANGELIST procedure.
If no terminal responds with a message within the specified number of passes through
the poll list, polling stops and the READ completes with an error 176 (poll sequence
ended with no responder). Figure 8-4
shows the TINET multipoint supervisor
noncontinuous poll sequence.