Everybody knows how Internet goes through copper wiring, fiber optics and wireless? But are the other communications media that could be uses? Yes there seems to be some unexpected ways to transport data. A core part of the hacker mentality is the desire to test limits: trying out ideas to see if something interesting, informative, →
Passive Etherner hub is special device I have seen in use in 1990′s. Nowadays there is no real use for Passive Ethernet hub, because it will not work with modern Ethernet standards (it only worked with 10BASE-T). Actually using Ethernet hub is nowadays past days as they have been for a long time replaced with →
50 years ago, Robert Metcalfe (who was working at Xerox PARC in 1973), wrote the first memo (titled “Alto Ethernet”) outlining what would become the ubiquitous Ethernet protocol! The idea was first documented in a memo that Metcalfe wrote on May 22, 1973. In 1979 he started a little company called 3com. Ethernet was commercially →
I visited Embedded Conference Finland 2023 today. Here are some picks from the conference. Analog Devices single pair Ethernet demo with 400 meters of cable Avnet Embedded gave me some Belgian chocolate Smarc vs new smaller OSM module →
uun (unshielded untwisted notpair) UUP (unshielded untwisted pair) Unshielded but not so twisted wire pairs in this Ethernet cable It is essentially multiple twin lead transmission lines, but yeah, lacking the benefits of twisting. And there is that one “split pair” that goes to pins 3 and 6. If other pairs are close what they →
Power over Ethernet, or PoE, describes any of several standards or ad hoc systems that pass electric power along with data on twisted-pair Ethernet cabling. There are several common techniques for transmitting power over Ethernet cabling. Three of them have been standardized by Institute of Electrical and Electronics Engineers (IEEE) standard IEEE 802.3 since 2003. →
Venerable Ethernet provides the backbone of the internet. Ethernet has risen to complete dominance for local area networks over its forty years of existence. The first Ethernet experimentals versions started in 1972 (patented 1978). The commercialization of Ethernet started in 1980′s. At first Ethernet technology remained primarily focused on connecting up systems within a single →
Nowadays it is possible to buy passive and active device to run Ethernet over Coax – some products support data transfer over larger distances then you can get on regular Cat5. The passive converters are typically limited to 100 Mbps maximum speeds up to 100-200 meters distance maximum. If you need faster speed or longer →
In this post I am talking about adapting 10 and 100 megabit twisted pair Ethernet to use coaxial cable instead of twisted pair wiring. Those 10BASE-T and 100BASE-TX Ethernet st standards use two wire pairs for communications (one for TX and other for RX). In this article I am describing how to adapt them to →
Ethernet started as a network that runs over coaxial cable. Over years the Ethernet has started to use mainly twisted pair wiring and fiber optics for communications. There seems to be every now and then still questions related to running Ethernet over coaxial cabling. This is the first part of multi-part post on running Ethernet →