Installation guide

CHAPTER 3: Installation

3.2.3 C

ONNECTING

CPU

CPU 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 Ultra 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 Ultra 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) 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 Ultra 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.)

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 Ultra doesn’t supply but the Mac Adapter does.

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