Realport Basics - Digi PortServer II User Manual

RealPort Basics

RealPort is a protocol developed by Digi International that, when used in conjunction
with device driver software on a host operating system, allows ports on the PortServer
II to be used as if they were connected directly to the host system. RealPort supports
all standard host system TTY interfaces, so that any system utility or user application
that works with a local serial port works immediately with RealPort.
One advantage that RealPort protocol has over TCP/IP protocols such as telnet is the
host operating system can directly change port parameters, such as baud rate,
hardware flow control and software flow control in the same way as it changes these
settings on a local port.
The ports on the PortServer II may be split among hosts; for example, one host can use
the odd-numbered ports while another is using the even numbered ports. RealPort also
allows one host to handle incoming modem calls on a port, while allowing other hosts
to place outgoing calls if there is no current incoming call. (This feature must be
supported by the host driver software.)
You must have the correct RealPort driver installed on each of your host systems to
take advantage of RealPort protocol.
RealPort drivers include a transparent print feature called DigiPRINT and a multiple
screen utility called DigiSCREEN. You should refer to the RealPort Device Driver
Software Manual for your operating system for full set-up and user instructions for
these features.
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