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 Multipoint Tributary Protocol
Envoy Application Programming Manual—427159-001
5-6
ASCII and EBCDIC Line Code
ASCII and EBCDIC Line Code
An application process uses only the ASCII character set. If the line code is EBCDIC,
Envoy can be configured to perform the necessary ASCII-to-EBCDIC translation. Envoy
recognizes when transparent text is being transmitted and does not translate transparent
text.
Retries
Line operations are subject to transmission errors in the form of block-check character
(BCC) errors, nonresponding remote stations, and incorrect responses from remote
stations. When these types of errors occur, Envoy, on behalf of the application process,
retries the requested operation.
Figure 5-2. BISYNC Multipoint Tributary Selection
036CDT .CDD
Message End
with EXT?
No
Error = 0, First
Message in Line
Buffer
CALL READ...
Station is
Selected
Monitor
Communication Line
READ Completes
Stations’ Select
State Set to Active
(Willing to Receive)
Read Data from
Supervisor
2
CALL CHANGELIST...
CALL CHANGELIST...
1
Yes
CALL READ...
Stations’ Select
State Set to Inactive