Any HDMI source can simultaneously be diplayed on any number of display devices (if multiple displays are permitted by the HDMI source) using VLAN isolation on a Managed Ethernet switch. Using the HTTP GUI a PC (wired or wireless) can control what signal is being watched at each location. Sophisticated Home Theater installations can use a programmable console to control the system using RS232 commands. The Managed switch must support IGMP and permit duplicate IP addresses across the VLAN domains. You must use a third party home automation solution to provide distributed remote control functionality.
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