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CHAPTER 3: Installation
can only be accessed by the monitors, keyboards, and mice on that master. Note
that when we say that CPUs 1 through 8 are “shared,” we mean that they can be
accessed by either master at different times,
not
by both masters simultaneously.)
Adding a third 4-port submaster unit would give you a total of 17 ports, and so on.
(To reach all of the CPUs in cascaded systems like this, you must set Maximum
computers, Width, and Units properly on the master unit; see
Sections 5.2.3
through
5.2.5
.)
3.3.1 C
ABLE
R
EQUIREMENTS FOR
E
XPANSION
To connect submaster units to a ServSwitch Ultra, you’ll need one ServSwitch-to-
ServSwitch Expansion Cable for each submaster unit. You will also need a CPU
Adapter Cable for each CPU you will be connecting to the submaster’s CPU ports.
(Remember that one MKM Adapter Cable is required to connect the master unit
to your keyboard, monitor, and mouse.) See
Sections 3.2.2
through
3.2.4
.
3.3.2 I
NSTALLING A
C
ASCADE
Laying out your ServSwitch Ultra system prior to installation will make the installation
process go more smoothly. It will also help you to keep the port-selection numbers
you’ll use in keyboard commands in a rational sequence. Figure 3-2 on the next
page illustrates the proper layout and numbering of your submasters and CPUs.
Keep these restrictions in mind when you design your ServSwitch system:
• If you use original Serv Adapter Cables and Expansion Cables, the distance
from any ServSwitch Ultra to any attached device should not exceed 20 ft.
(6.1 m); the total length of original Serv cabling from any CPU to any monitor,
keyboard, and mouse should not exceed 40 ft. (12.2 m). Depending on your
application, these distances might be less; see
Section 4.1.3
.
• If you use coaxial Adapter Cables and Expansion Cables, the maximum
distance from the ServSwitch Ultra to any attached device should not exceed
20 ft. (6.1 m) with typical monitors and video resolutions, but see the Caution
notice on page 23. Depending on your application, this distance might vary;
see
Section 4.1.3
.
• The total number of CPU ports accessible by any ServSwitch Ultra master unit
must not exceed 256.
• Do not use older (“-R2” product code or earlier) mini (SW721 or SW722)
model regular ServSwitches as submasters in your ServSwitch Ultra system.
Their cascading logic and command language is different from that of all
other Serv type units.
