Black Box ServSwitch Duo KV6EXT-R2, Руководство пользователя

Страница: 35 / 53

34
SERVSWITCH ™ DUO EXTENDER
5.5 Contending for Control of the Duo-System CPUs
The user station at the ServSwitch Duo Extender contends with the user stations
directly attached to the Duo system for keyboard and mouse control of the Duo
system’s CPUs. While a user at one station is in control of a CPU, the Duo system
won’t accept keyboard or mouse data for that CPU. If the Extender’s user station is
“locked out” in this way, its keyboard’s Num Lock, Caps Lock, and Scroll Lock
LEDs will flash in unison (as shown in Figure 5-2 in
Section 5.3
) to show the user at
that station that he or she will have to wait to access the Duo-system CPU until the
other station is finished.
The Extender user can try to take keyboard and mouse control of a Duo-system
CPU by selecting it with a hotkey command (see Section 5.7 ) or—if you enable
mouse switching—with their three-button mouse or wheel mouse (see Section 5.8 ):
• If the Duo-system CPU is being controlled by another Duo user, these attempts
will fail, although the Extender user will be able to see the Duo-system CPU’s
video unless the Duo user has selected the CPU for “exclusive use” (see the
“Exclusive Use” and “Selecting Computers Using the On-Screen Menu”
sections of your Duo manual).
• If the Duo-system CPU is available (none of the Duo users are controlling it),
these attempts will succeed. The Extender user will see the Duo-system CPU’s
video and will have keyboard and mouse control. He or she will keep control
until he or she stops using the keyboard and mouse or selects the local CPU or
the nonexistent “CPU zero.” At that point, the Duo will begin counting down
toward its inactivity timeout (see the “User timeout” section of the Duo
manual). Until the timeout expires, the Extender user can reset the timeout by
reselecting the Duo-system CPU or by resuming activity at their idle keyboard
and mouse. Even after the timeout expires, the Extender user can reclaim
control if he or she is the first to select the Duo-system CPU. But if a Duo user
is the first to select that CPU after the timeout expires, the Extender user must
then wait until the Duo user relinquishes control.