Black Box ServSwitch Duo KV6EXT-R2, User Manual

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CHAPTER 5: Operation
5.3 How the Extender Uses the Keyboard LEDs
The ServSwitch Duo Extender also uses the LEDs on the attached keyboards to
indicate various conditions. It will light the Num Lock, Caps Lock, and Scroll Lock
LEDs in several different ways:
• Configuration-mode indication—rolling sequence. As shown in Figure 5-1, the
Extender flashes the Num Lock, Caps Lock, and Scroll Lock LEDs on the
attached keyboard in sequence to show that it’s in configuration mode (see
Section 4.2.2 ). Num Lock will light first while Caps Lock and Scroll Lock are
dark. Then Caps Lock only will be lit, then Scroll Lock only, and then Num
Lock again. The cycle repeats itself continuously until you exit configuration
mode, after which the LEDs will be placed back in the states they were in
before you went into configuration mode.
The speed of the cycle indicates how much video compensation the
Extender is applying (which is one of the things you can set in configuration
mode): A slow flash rate indicates low compensation suitable for shorter cable
distances, while a fast flash rate indicates high compensation suitable for
longer distances. For examples of actual rates and distances, see step 1 in
Section 4.2.2.A .
Figure 5-1. The configuration-mode LED pattern.
• Control-lockout indication—unison flashing. As shown in Figure 5-2, the
Extender flashes all three keyboard LEDs at the same time (all three ON, then
all three OFF, repeating indefinitely) to show that user station directly
attached to user port #1 of the Duo has keyboard and mouse control of
port #1. Once the Duo’s inactivity timeout expires (see the “User timeout”
section of your Duo manual) so that the Extender’s user can take control of
the CPU, these LEDs will stop flashing and return to their previous states.
Figure 5-2. The control-lockout LED pattern.
NUM
LOCK
CAPS
LOCK SCROLL
LOCK
NUM
LOCK
CAPS
LOCK SCROLL
LOCK
NUM
LOCK
CAPS
LOCK
SCROLL
LOCK