Network Technologies ST-xU - Manual (Page 13)

NTI NODEMUX SERIES UNIVERSAL KVM SWITCH
9
OPERATION
Control over the CPUs attached to the NODEMUX is achieved through operation of the NODEMUX. Once the NODEMUX is
properly connected, the NODEMUX will enable a connection to be made between the CPUs attached to its "VIDEO x" and "CPU
x" ports and the keyboard, monitor, and mouse attached to the "MONITOR" and "DEVICES" ports. The LEDs on the control
panel of the NODEMUX will illuminate depending on which port (and subsequent associated CPU) is being connected to the
keyboard, monitor, and mouse. The choice of which CPU a keyboard, monitor, and mouse will be connected to is determined by
controlling the Universal KVM switch either through either of 3 methods:
•
front control panel
•
keyboard control through an On Screen Display (OSD) menu
•
RS232 control
Front Panel Control
There is a touch-switch and LED on the front panel of the NODEMUX for each CPU the switch will connect the keyboard, monitor,
and mouse to. Pressing any touch-switch on the front panel of the NODEMUX will connect the selected CPU to the keyboard,
monitor, and mouse.
Holding down any front panel touch-switch for more than 2 seconds will cause the NODEMUX to cycle through all modes of
operation including COMMAND, SCAN, BROADCAST, and NORMAL (described on page 15). The three mode LEDs on the front
panel indicate which mode is selected. Release the touch-switch when the LEDs indicate the desired mode. When no mode
LEDs are illuminated the user is in Normal Mode controlling directly the CPU to which the user is connected through the
NODEMUX.
Keyboard Control
A user has Keyboard control of the NODEMUX using Command Mode through on screen display (OSD) menus superimposed
onto the monitor. By pressing <Ctrl> + <`> (accent key), the user can enter Command Mode. Once in Command Mode, typing
a series of commands will cause the NODEMUX to connect the user to any one CPU connected to the switch. Pressing the
<Esc> key will exit Command Mode.
OSD
OSD superimposes a menu system on the user’s video screen with a list of all connected CPUs. OSD allows CPUs to be named
(with up to 12-character names). OSD then allows selection of CPUs by that name. Connected CPUs can be listed by name or
by port number. OSD Search Mode enables the user to type in the first few characters of the CPU's name and the OSD will locate
it. Help screens assist with many OSD functions.
Security Option
The security option in the OSD menu enables an administrator to control access to the CPU ports for each user. Up to 24 users
can be created. These users have controlled access to any CPU. Only the administrator can activate or deactivate the security
features. Security can be activated from the Maintenance Mode menu (page 18) with a successful administrator login for
verification purposes. Furthermore, the administrator can set a maximum idle time value after which the current user will be
logged out and the login screen displayed. This time out does not function while the OSD is active. The current security status,
idle time out, and scan dwell time are all saved and will be restored whenever power to the switch is cycled OFF, then ON.