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
3-34
Initial READ Operation
Figure 3-2 shows the action of the local station using the SWIFT BISYNC Point-to-
Point protocol in response to line conditions on an initial READ.
Figure 3-2. SWIFT Point-to-Point Initial READ
014CDT .CDD
Text
Received?
* Data Terminal Ready if switched line.
** Control Character other than ENQ received.
Timeout?
Wait for the
Bid
CALL READ...
Text
Overrun?
Wrong
Protocol?
**
DLE EOT
Received?
EOT
Received?
ENQ
Received?
Retry
Count = 0?
Retry
Count = 0?
Retry
Count = 0?
Retry
Count = 0?
Error = 162
Error = 162
Error = 162
Error = 172
Error = 164
Error = 163
DROP DTR *
1
See
Continuation
READ
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No