Further to our last PoE Tech Note, this brief tech note discusses the current situation with PoE above 30W (or the IEEE802.3at standard). Although there are many IP cameras requiring greater than 30W, there is no current standard for this. However, … Continue reading
PoE has emerged as a popular technology that provides power and data to network devices on the same Ethernet cable. All Powered Devices (PDs), including security network cameras, wireless access points (WAPs), building automation and control systems, and voice-over-IP phones … Continue reading
We all know that the world is going to IP for almost all communications. Despite this trend, it is a fact of life that a great deal of industrial communications still employ serial protocols such as RS232, RS422 and various … Continue reading
Before we go in to details of tests that should be performed on a L2 switch, let us look at its internal workings. Figure 1 below shows the data paths inside a multiport Gigabit layer 2 switch with major functional … Continue reading
Ethernet networks have seen a phenomenal growth due to their ability to satisfy five critical requirements: performance (response time, bandwidth and scalability), resilience, ruggedness, economy, and interoperability. Due to this rapid growth, selecting optimal yet cost effective infrastructure components for … Continue reading
In Tech note “Fiber Types and Using Them Effectively”, the purpose of Mode Conditioning Patchcords (MCP) is explained, i.e. it was originally intended to enable 1000BaseLx type Gigabit Ethernet equipment designed and optimised for operation over singlemode fiber to work … Continue reading