StarTech.com SV1631DUSBU - Manual (Page 7)

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NOTE: A device (computer or KVM switch) at any ‘PC x’ port can be
changed at any time after initial power-up. If you change any one of the
PC 1 to PC 8 port connections from a computer to a Slave KVM switch
or vice versa, or replace the devices of a port, the OSD will update this
change the next time it is activated.