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SERVSWITCH™
3.2.3 C
ONNECTING
CPU
S
CPU Adapter Cables run from the ServSwitch to the keyboard port, mouse port,
and video-output port of each CPU you want to directly attach to it. Different types
of this cable fit the connectors on different computers (see Appendix B). This
cable also comes in the different lengths supported by different applications (see
Section 4.1.3).
CAUTION!
Avoid routing cable near fluorescent lights, air-conditioning
compressors, or machines that may create electrical noise. Total length
of original Serv cable from the ServSwitch to any attached device
(keyboard, monitor, mouse, CPU, or submaster) should not exceed 20 ft.
(6.1 m); total length of original Serv cabling from any CPU to any
keyboard, monitor, and mouse shouldn’t exceed 40 ft. (12.2 m). For
typical equipment and
video resolutions, length of coaxial cable should
not exceed 20 ft. (6.1 m)
from a ServSwitch to any attached device.
However, we do provide coaxial cable in lengths up to 100 ft. (30.5 m),
because some CPUs can drive and receive keyboard and mouse signals
at greater distances than others. To go even farther, you might want to
use Station Extenders or CAT5 KVM Extenders (see Appendix B).
1. After you verify that the Switch is turned off and unplugged, plug the DB25
male connector of the first CPU’s CPU Adapter Cable into the lowest-
numbered CPU port on the Switch’s rear panel that isn’t going to be
occupied by a submaster Serv type switch. Use consecutively higher-numbered
ports for the rest of the CPUs. For example, if you planned to put three
submasters and three CPUs on an 8-port master Switch, you would put the
submasters on ports CPU 1 through CPU 3 (see Section 3.2.4), and you would
plug the three CPUs into ports CPU 4 through CPU 6.
2. Plug the CPU Adapter Cable’s video-, keyboard-, and mouse-port connectors
into the corresponding ports on the CPU. The CPU should be OFF when you
do this; the Switch will automatically adjust to the CPU’s keyboard mode
when you power up the CPU. Avoid plugging CPUs into the ServSwitch if they
are already ON; if you accidentally do so, see
Section 5.3.2 to make sure the
Switch is set for the proper keyboard mode.)
CAUTION!
Do not attach docking stations for ThinkPad
®
or other portable
computers, no matter what type or make, to the ServSwitch. It does not
support docking
stations; your Serv system might not function properly if
any are attached.
Even if you connect your ThinkPad directly (rather than through a
docking station) to the keyboard, video, and mouse feeds from the
ServSwitch, it still won’t work, because the ServSwitch supports only
“stream mode” (continuous) mouse data but the ThinkPad has to see
“prompt mode” (burst-on-request) mouse data.