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 Point-To-Point Protocol
Envoy Application Programming Manual—427159-001
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ID Exchange
•
ID NAK: The negative acknowledgment indicates that the station is not ready to
receive data. If this is returned, the WRITEREAD by the caller completes with line
state = CONTROL, error = 0.
•
ID WACK: The wait for acknowledgment indicates that the station is temporarily
not ready to continue. If ID WACK is returned, Envoy waits for one timeout interval
then reissues the ID ENQ sequence on behalf of the caller. If the ID WACK
sequence continues to be returned and the ID ENQ sequence is issued as many times
as the retry count specifies, the WRITEREAD by the caller completes with line state
= DISCONNECT, error = 170. Note that a WACK sequence consists of “DLE ;” in
EBCDIC and “DLE” in ASCII.