LevelOne KVM-0410 - Manual (Page 11)

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-------------------- Cascade Configuration
Connection
Before connecting a device (a computer or a Slave KVM Switch) to a
KVM Switch under power, you must turn off the device.
Note: The Master must have equal or more 'PC x' ports than that of
the Slave, i.e., if an 8-port switch is the master, a 4-port or an 8-port
switch can be a Slave, but not a 16-port one. PS/2-only models can
be cascaded with USB-PS/2 combo models.
The ports labeled "PC 1"~”PC 8” can be connected to either a
computer or a Slave's CONSOLE port, as shown in figure 10. The
ports “PC A"~”PC H” can only be connected to computers.
Figure 10: Slave console connection
Note: Use only 1-to-3 (PS/2) cables for connection between the
Master’s PC ports and a Slave’s CONSOLE port in cascade
application.
The maximum number of computers controlled by a master/slave
configuration with all 4-port units is 16 -- with 4 Slaves and each Slave
connects to 4 computers, see figure 11.
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Figure 11: All 4-port KVM Switches in cascade
The maximum number of computers controlled by a master/slave
configuration with all 8-port units is 64 -- with 8 Slaves and each Slave
connects to 8 computers, see figure 12.
Figure 12: All 8-port KVM Switches in cascade
The maximum number of computers controlled by a master/slave
configuration with all 16-port units is 136 -- with 8 units of 16-port
Slaves (to "PC 1"~”PC 8”) and each Slave connects to 16 computers;