Ethernet over Coax
Download the NVT NV-EC1701 specsheet
might be outside of the electronic security sector, the business does have some security veterans in there, so they understand the needs of our market. The CWFE1COAXM delivers 10/100Mbps ethernet over 75 ohm coaxial cable. Transmission distance for the units is quoted as 305 metres. Versions are available that also support power over ethernet. The units are supplied with PSUs. The power units have interchangeable pins so are suitable for a wide range of sockets, including UK three-pin options.
The units are robust in construction, and
feature a metal housing with mounting bracket. They measure 100 x 60 x 25mm, which makes them ideal for locating in tight spaces - just ensure there’s a decent airflow. Connections are very simple. There is an RJ45
port for linking to a network, a female BNC connector for linking to the coaxial cable, and a power input. The only adjustment that the units offer is via a simple selector switch. This allows units to be designated as either a Master or Remote unit.
A Master unit should be located at the end of the coaxial link with the video source, with a remote unit located at the other end of the coaxial run.
Aside from this, all other functions are described as true plug and play. The unit automatically assigns the data rate based upon the cable length and quality.
Installation is so simple that no one will have
any real issues with the unit. There are two status LEDs: one for power and one for data transfer over the coax link. The device is supplied with a sparse information sheet. There’s not a lot you’ll need from it. The only thing we wanted to double check was which end of the link is designated as Master and which as Remote. On the diagram an asterisk indicates that there is a note about this, but the actual note isn’t there! The information is on the company’s website, but it should be included. The units feature a two year warranty.
Muxlab 500110
Muxlab is increasingly active in the audio visual market, but still retains a solid range of video surveillance based products. Amongst these is the 500110, which the company refers to as a CCTV IP Extender.
The 500110 is designed to deliver 10/100Mbps ethernet over 75 ohm coaxial cable. Transmission distance for the units is quoted as up to 1600 metres dependent upon data rate and cable quality; to be honest, we’d err on the side of caution and go with the lowest specified distance of 330 metres! The devices are supplied as a pair, with a
transmitter and a receiver unit. The former is used on the camera side of the link, with the latter located on the network side. Both units are supplied with PSUs with interchangeable pins, including a UK three-pin option. The transmitter unit features two RJ45 connections, and so can support two cameras without the need for an additional switch. Connections only differ with regard to the number of RJ45 ports: the receiver has a single port for connection to the network. Both units also feature secondary RJ45 ports to link the two units together should they be used as extenders rather than to establish a coax link! Both units also feature a female BNC connector for linking to the coaxial cable, and a modular power input. There are no user adjustments at all.
Whilst the units will still function if the
transmitter and receiver units are transposed, this will have a negative impact on throughput speed, so ensure that are used correctly. Both carry the designation clearly marked on their covers, so there’s no excuse for getting it wrong!
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