Dualcomm DECA-100 Ethernet-over-Coax (EoC) Adapter Kit includes two identical passive Ethernet-to-Coax adapters to enable a full-duplex 10/100Base-T Ethernet connection over a coaxial cable with transmission distance as long as 240 meters (850 feet). DECA-100 EoC Adapter Kit can be effective for several applications such as transmitting IP camera video transmission over coaxial cables (e.g., IP CCTV over Coax) and creating a wired home network of true 100Mbps over existing in-building coax cables. [Alert: (1) DECA-100 EoC Adapter Kit works only with point-to-point coax cabling, i.e. home-run cabling. It will not work if there is any splitter along the coax cable; (2) DECA-100 EoC Adapter Kit does not pass PoE power. We have a new product DECA-200 PoE-over-Coax Adapter Kit available now from Amazon store, which passes both Ethernet data and PoE power; (3) Packet looping inside an Ethernet switch may happen if a non-switch end of an EoC connection is not connected or terminated with a network device. Therefore, always keep any EoC link terminated to prevent from possible packet looping from happening. Also, Pairtek's ECS1084 Ethernet-over-Coax Switch can be used that can automatically prevent packet looping from happening even when an EoC link is left open or not terminated]