Black Box ACU3001A, CAT5 KVM Micro Extender, ACU3009A SERVSWITCH BRAND CAT5 KVM MICRO EXTENDER

SERVSWITCH™ BRAND CAT5 KVM MICRO EXTENDER

7.5Shared User Access (Dual-Access Systems Only): The Inactivity Timeout and Private Mode

Because two user stations (one local, one remote) can be attached for each CPU, the Dual-Access Extender system has these “shared access” features:

•The two stations normally contend for access. When there has been no keyboard or mouse activity on one station two seconds, the Extender will switch to the first station from which it detects a keyboard keypress or mouse movement.

This “inactivity timeout” prevents a user at the other station from interrupting work in progress at the active station. Because this timeout is in effect, when the Extender system boots up, the Extender gives control (and its total attention) to the local station for at least the first two seconds; this means that the remote monitor might be blank, and the remote keyboard and mouse inactive, for that long.

•For applications in which the remote station is not in a secure location, or must be temporarily kept from accessing the PC, the local user can trigger the Extender’s “Private Mode,” which disables the remote monitor, keyboard, and mouse.

Here’s how it works: A user station is activated by pressing a key on its keyboard or 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 PC. 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 PC with their keyboard or mouse while the active station is in use. Once the active station’s keyboard and mouse are idle for more than two seconds, the Extender “lets go” of that station, and will switch to whichever station it next detects keyboard input from.

When they have control of the Extender, users at the local station can force the Extender into Private Mode by pressing Scroll Lock once on the local keyboard. The Scroll Lock LED will light on both the local and remote keyboards. Other than this indication, the remote station is completely disabled: the monitor goes blank and the keyboard and mouse stop working. Local users must press Scroll Lock again to re-enable the remote user station; when they do so, the Extender also re-initializes the local keyboard and mouse. (To reset the local keyboard and mouse without going into Private Mode, quickly press and release Scroll Lock twice, as directed in Section 7.3.)

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