6100 BSC Programming Manual

Writing Applications that Use 6100 BSC
START/STOP OPERATION Request
An application should never issue a START or STOP line request.
START doesn't really do anything; it exists simply for
compatibility with other protocol modules. If an application
issues a START, the request completes immediately.
The format for the START request is:
Function := 6
Modifier := Doesn't matter
Request ID := A unique value from 1 to 32767,
application-dependent
Text Out := Doesn't matter
Text In := Doesn't matter
Text := None
The response format is:
Response := 6
Status := 0 (always)
Request ID := The same as in the request
Detail := 0
Text In := 0
Text := None
The STOP request aborts the active request, if there is one, and
disconnects the line. If the line is switched, BSC drops DTR and
waits for DSR to drop; it also sends DLE EOT to the other
station. If DSR doesn't drop within the interval defined by
BSCDISCONNECTTO, the request completes with an error. If the
line is leased, the request completes immediately with good
status.
An application should not issue STOP requests. CP6100 issues a
STOP when the last user closes the line unless the NOAUTOSTOP
parameter is specified.
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