User`s guide

Configure Physical Serial Ports
Chapter 5 Configure Ports 78
Automatic detection state: Off, Active, Passive
The automatic detection state for all or individual ports can be set to one of
three states: Off, Active, or Passive. The automatic detection state is set by
the Basic serial port configuration setting Automatic detection:
The three automatic detection states have these effects:
• Off: Automatic detection is not on. The Digi Passport will not attempt to
determine what is attached to the serial port.
• Active: The Digi Passport unit sends probe sequences to the serial port
according to the defined port automatic detection list.
• Passive: The Digi Passport unit does not send out probe sequences to the
port. Instead, it passively monitors the port at the defined settings and
attempts to discover the baud rate, operating system and hostname from
traffic sent from the port and while it is used.
Important: For Active and Passive automatic detection to work, make sure
that the DNS configuration and the Port automatic detection configuration
are both properly configured.