Rev. : 1.0 P.18Rear View11. KVM SessionCascadePortChannelPortDCPowerRKP241X-801RKP241X-1601DC Power -connect to external 12V DC power adapter.Cascade Port -connect to additional KVM switch for channelexpansion.Channel Port -connect to PC computer with CD-6 3-in-1 KVM cable.RKP2415 / RKP2417 / RKP2419 User Manual