Black Box KV822A Interpreting the Status Display During Normal Operation, Display Shows Meaning

SERVSWITCH™ USB AND USB PLUS

5.3 Interpreting the Status Display During Normal Operation

The ServSwitch USB’s front-panel 7-segment status display usually shows the number of the currently selected computer channel. On the ServSwitch USB Plus models, the dot LED alongside it also flashes in response to data from the shared PS/2 keyboard or mouse, as shown in the top illustration in Figure 5-2 below.

When you change CPU channels, this display will flash as shown in the second illustration below, more and more quickly, until the USB “enumeration” process is complete (see Section 3.1); until the display stops flashing, the channel cannot be changed again.

If you hold in the Switch’s front-panel pushbutton for five seconds, the Switch starts autoscanning (see Section 5.2.3). The display will alternately (a) show the current channel number and (b) light each of its outer six LED segments, one after the other, in a clockwise sequence, as shown in the third illustration.

DISPLAY SHOWS:		MEANING:
Channel number 1 through 4,		That channel is selected
steadily lit
As above, with flashing dot in		USB Plus models only:	Switch is
lower right-hand corner		receiving PS/2 keyboard or
		mouse data
	Zero	Video is disabled, but not controls

Channel number 1 through 4, flashing

Switch is performing enumeration

Alternately, channel number and clockwise progression of lit

segments

Switch is in autoscan mode, scanning from channel to

channel, pausing at each one for user-selected period

Figure 5-2. The front-panel status display during regular operation.

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