Envoy Configuration and Management Manual

Subsystem Control Facility (SCF) Commands for
Envoy
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INFO PROFILE Command
DEDICATED
causes Envoy to allocate a dedicated I/O buffer at process initialization.
CHECK
enables incoming message parity checking.
DSRSENSEON
enables DSRSENSE capability. The loss of the DSR modem signal is sensed
and reported as an error during a READ or WRITE operation.