• WiFi:
  ECS transmits commands over Ethernet/WiFi.
  Range is <= 150 ft, depending on obstructions.
  Communication is two-way: Modules respond to commands (so you know the module's state).

  Model(s)/manufacturer

  Mpower-Mini (no dimming) / Ubiquiti

  Mpower (no dimming) / Ubiquiti

  Mpower-Pro (no dimming) / Ubiquiti

  

• Ethernet:
  ECS transmits commands over Ethernet (wired).
  Communication is two-way: Modules respond to commands (so you know the module's state).

  Model(s)/manufacturer

  WebSwitch (no dimming) / ControlByWeb

  WebSwitchPlus (no dimming) / ControlByWeb

  

• Z-Wave (Z-Wave):
  ECS transmits commands to Z-Wave modules via radio signals.
  Range is 30-300 ft, depending on obstructions, and how many devices are in the network (each of which acts as a repeater).
  Communication is two-way: Modules respond to commands (so you know the module's state).

  Access	Model(s)/manufacturer
  RS232	All Z-Wave-compatible lamp modules/dimmers (HA03, etc) Controlled via the VRC0P-1LW or the Omni.

  

• ZigBee (ZigBee):
  ECS transmits commands to ZigBee modules (e.g. the Hue Lighting Bridge or Hubitat) via radio signals.
  Indoor range is 30-90 ft, depending on obstructions. Line-of-sight range can be much more.
  Communication is two-way: Modules respond to commands (so you know the module's state).

  Access	Model(s)/manufacturer
  Ethernet	Hue Lighting / Philips
  Ethernet	Enbrighten Z-Wave Smart Rocker Light Switch / etc (via HubitatElevation) / GE

  

• X10 (AC powerline):
  ECS transmits commands to X10 modules via AC power lines.
  Least expensive, but also the least dependable.
  Communication is one-way only: Modules do not respond to commands,
  so there is no way to know if a module actually receives a given command.
  Supported via the CM11A/CM11U, Omni, and Ocelot.

  Access	Path	Model(s)/manufacturer
  RS232	X10	All X10-compatible lamp modules/dimmers
  RS232	X10	6381 / Leviton
  RS232	X10	ALC-Lighting (via Omni-II, OmniLT, OmniPro-II) / OnQ

  

• UPB (AC powerline):
  ECS transmits commands to UPB modules via AC power lines.
  The best power line technology available (in terms of both reliability and longevity).
  Communication is two-way: Modules respond to commands (so you know the module's state).

  Access	Path	Model(s)/manufacturer
  RS232	All UPB-compatible lamp modules/dimmers
  RS232	UML-E-W Lamp Module (UPB technology, via UMC-DB9-W, 36A00-1, or Omni) / Simply-Automated
  RS232	US11-40-W Wall Switch Dimmer (UPB technology, via UMC-DB9-W, 36A00-1, or Omni) / Simply-Automated
  RS232	UFD Fixture Dimmer (UPB technology, via UMC-DB9-W, 36A00-1, or Omni) / Simply-Automated
  RS232	UFD Fixture Dimmer (UPB technology, via UMC-DB9-W, 36A00-1, or Omni) / Simply-Automated

  

• Wired solutions:
  Controls light voltages directly.
  Extremely robust/dependable (much more so than power line).

  Access	Path	Model(s)/manufacturer
  RS232	Wired	LiteJet (via Omni-II, OmniLT, OmniPro-II) / CentraLite
  RS232	Wired	Elegance (via Omni-II, OmniLT, OmniPro-II) / CentraLite

  

Terms used above:

      RF stands for radio-frequency.

      RS232 refers to a standard serial port (referred to as COM1/COM2/etc in Windows).
      Note: Most modern PCs no longer include serial ports. But they may be added via an internal card or a USB Serial Adapter.

• Purchase one transmitter (e.g. a tabletop console) and one module.
• Plug the module into the outlet furthest from the PC room.
• Plug the console into an outlet in the PC room.
• Push the console buttons to turn the module off and on, and verify that it responds.
  Note: If an X10 module fails to respond, changing the building-code may help.

• Purchase a controller/remote and two modules (e.g. Intermatic HA101K Home Settings Wireless Kit).
• Plug module1 into an outlet in the center of the building (to act as a repeater).
• Plug module2 into an outlet furthest from the PC room.
• Take the remote to the PC room.
• Push the remote to turn the modules off and on, and verify that they respond.