Multiple Screens; Configuring Terminals For Multiple Screens; How To Use Multiple Screen Sessions - Digi PortServer II User Manual

Multiple Screens

Configuring terminals for multiple screens

To allow multiple screen operation, you must configure the port for operation with
this type of terminal by entering the following command:
set ports termtype <terminal_name>
The PortServer II allows up to sixteen different terminal types to be configured. Each
terminal type must have a distinct name, although a particular terminal may have
several names if it can be used in more than one mode. For example, a Wyse 60 can be
used in the following modes, each of which should have its own name:
• 43 line mode (no screen switching)
• 24 line standard mode (two screens available)
• 24 line ECON-80 mode (three screens available)
• WYSE 50+ mode (six screens available)
For each terminal, you must define the name, the number of screens used, the terminal
screen clear sequence, and the sequence to switch to each screen page, using the set
terms command (see the Command Reference Guide).
Note: Your terminal must support multiple screen operation for this configuration to
succeed. You cannot configure a basic terminal for multiple screen operation.
Refer to your terminal documentation for further information.

How to use multiple screen sessions

If your port is configured for a terminal that supports multiple screen sessions,
PortServer II automatically switches between screens on your terminal when you
switch between sessions.
The PortServer II screen switching algorithms were designed to maintain as much
screen context as possible. It is, however, not possible to maintain screen context if
you start more sessions than you have screens available. For example, you cannot dis-
play four sessions on a terminal with only three screens. In this situation, PortServer
II maintains screen context on the most recently used sessions, and looses context on
the unused sessions.
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