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CHAPTER 3: Installation
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 keyboard, monitor, and mouse to any
given CPU should not 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 (keyboard, monitor, mouse,
CPU, or submaster). 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 (see Appendix B) if your
common keyboard and mouse are IBM type.
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 (on IBM type cables)
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 4.3.7 to make sure the Switch is set for the proper keyboard mode.)
NOTE
You’ll need to attach a Mac Adapter for ServSwitch (our product code
KV99MA) between the video strand of the CPU Adapter Cable and the
video-output port of any Macintosh CPU that outputs video in a format
other than VGA (640 x 480). This is because the video circuitry of Mac
CPUs often needs to see “ID bits” from the attached monitor, which the
ServSwitch doesn’t supply but the Mac Adapter does.
CAUTION!
Do not attach docking stations for ThinkPad
®
or other portable
computers, no matter what type or make, to the ServSwitch. At the time