Ethernet over coaxial cable is a non-modem solution designed for the delivery of full-duplex, synchronous high-speed data over existing coaxial cable. It is a revolutionary product that provides both 100BaseT full wire speed Ethernet and power (maximum 60W) over the same coaxial cable.
The adapters convert the symmetrical send/receive Ethernet signals into asymmetrical signals and then combine them to be transported over a single strand of copper. [See .] To compensate for the loss that occurs during conversion, the system re-amplifies the received signal. [See , as a function of current, for different types of coaxial cable.]
Depending on the installed coaxial cable type distances of up to 350m are possible, and up to 700m if a repeater is enployed.
The UCA-6000 Series consists of the 1-port Ethernet over Coax Adapter, the 4-port Ethernet over Coax Adapter and an optional repeater module the .
The UCA-6000 Series is an ingenious solution designed to lower the total cost of IP-video installations. Many existing CCTV systems employ co-axial cable as the video transmission media with some sites having 10s or 100s of kilometres already installed. By employing a pair of UCA-6000 Series Adapters it is now possible to use this existing coaxial cable to transmit fully specified Ethernet signals transparently across a link of up to 350m. A power transmission capability (maximum 60W) means that no power is required at the remote end and this can further reduce the cost of new installations.
The UCA-6000 Series Adapters are also useful for providing Ethernet connections in excess of the normally permitted 100m. With a maximum range of 350m, a pair of UCA Series Adapters can become a low cost alternative to fibre-optic media.
For installations were one or more coaxial links need to have a length that is greater than 350m, a repeater (UCA-6220/R) can be inserted in the co-axial cable to create fully transparent Ethernet connections up to 700m. The repeater and remote adapters are powered over the cable.
UCA-6000 Series - Features
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Transmit full duplex 100Mbps Ethernet and power over coaxial cable
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Single channel (UCA-6120) and four-channel (UCA-6124) Adapters available
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Low latency, transparent to higher level protocols
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Connect IP cameras using existing coaxial cables. Removes cabling cost when upgrading from analogue to IP video systems
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Long cable lengths, up to 250m [829 ft] (RG59), up to 350m [1,150 ft] (Coax-6)
700m with in-line repeater (UCA6220/R)
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Remote end is powered over the coaxial cable, no need to run a separate power spur
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Low power consumption (3.5W)
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Maximum transmitted power (60W)
UCA-6000 Series - Applications
[1] Megapixel Cameras
CCTV cable is normally routed to a central point, forming an effective single “star” network topology. Exploitation of legacy video cable with UCA-6210 actually solves a major problem with megapixel cameras – that of the high network bandwidth requirements for such devices.
In this application, a high-resolution megapixel IP camera replaces a standard analogue CCTV video camera. The IP camera’s standard Ethernet TCP/IP connection is linked to a UCA Series Adapter with a short CAT5 patch cable (straight through or cross-over). Both the camera and the UCA-6120 Adapter are powered from the same power supply, and both may be fitted inside a standard external camera housing. The UCA Series Adapter link runs across the existing installed 75-ohm co-axial video cable, and the rest of the network is connected at the other end (usually, but not necessarily, a control room or equipment room). One, several or many such links may feed into the network to an NVR (network video recorder). As the network link is full speed and fully transparent, the IP camera appears on the network as a completely normal IP connection.
[2] Multiple IP Cameras
In this application, multiple IP cameras replace a single analogue CCTV video camera. The IP cameras are connected to a small network switch. One port of the switch is linked to a UCA Series Adapter. Again, the UCA Series Adapter link runs across the existing installed 75-ohm co-axial video cable, and the rest of the network is connected at the other end which again, usually includes one or more network video recording systems, which “see” the cameras as if they were connected over Ethernet cable.
[3] General Application
In a completely general application, any network device is connected across a length of co-axial video cable. An example might be a Gatehouse located remotely from the main building, connected only with a video cable (perhaps originally laid-in for a night-guard to view a camera). Now this legacy cabling can be turned into a full 100BaseT network connection and used for any network communication purpose required (IP cameras, PCs, printers, network controllers, voice-over-IP systems in fact any Ethernet equipment of any type).
