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CHAPTER 7: Operation
7.3 Shared User Access (Dual-Access Model Only): The Inactivity Timeout and
Private Mode
Because two user stations (one local, one remote) can be attached to it, the Dual-
Access model of the KVM Extender for Sun has these “shared access” features:
• The two stations normally contend for access. When there has been no
keyboard or mouse activity on one station for the duration of the “inactivity
timeout” period, the extender will switch to the first station from which it
detects a keyboard keypress (or mouse movement, if DIP-switch position 3 is
set to OFF—see Section 5.2).
The “inactivity timeout” prevents a user at the other station from interrupting
work in progress at the active station. The timeout is factory-preset to two
seconds; if you would rather set it to 15 seconds, set DIP-switch position 2 to
OFF (see Section 5.2). Depending on how long the timeout is set for, when the
extender system boots up, the Local Unit gives control (and its total attention)
to the local station for at least the first two or fifteen seconds; this means that
the remote monitor might be blank, and the remote keyboard and mouse
inactive, for up to fifteen seconds.
• For applications in which either station is not in a secure location, or must be
temporarily kept from accessing the Sun CPU, users at either station can
trigger the extender’s “Private Mode,” which disables the other monitor,
keyboard, and mouse.
Here’s how it works: A user station is activated by pressing a key on its keyboard, or
(if DIP-switch position 3 is set to OFF—see Section 5.2) by moving the mouse. This
first keypress, or the first packet of mouse data, is absorbed by the extender and is
not passed on to the CPU. The extender “latches onto” this user station; users at
the other station can see what’s happening on their monitor, but can’t control the
CPU with their keyboard or mouse while the active station is in use. Once the
active station’s keyboard or mouse is idle for more than fifteen seconds, the
extender “lets go” of that station, and will switch to whichever station it next
detects keyboard input from.
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