Telecom and Networking

Cable tester NF-8209 tested

NOYAFA NF-8209 Network Cable Tester is used to measure cable continuity. It enables the measurement of connection errors in UTP / STP twisted pairs. The device is manufactured by SHENZHEN NOYAFA TECHNOLOGY CO., LTD and sold with several different brand names. NF-8209 Main features: 1. Two scan modes selectable: AC filter & Non AC filter.

Uusiteknologia 2/2020 magazine published

Uusiteknologia.fi is a Finnish language electronics and technology professionals magazine published on-line. In the newest issue have written articles on many high tech topics (text in Finnish with short introduction in English). Newest issue Uusiteknologia 2/2020 has just been published. I have written two articles to the newest issue. The front page article is about

Stingray and Hailstorm

Security researchers say they have developed a new technique to detect modern cell-site simulators. Little is known about stingrays that exploit flaws in the way that cell phones connect to 2G cell networks, because they are deliberately shrouded in secrecy. Most of those flaws are fixed in the 4G networks, though not all. Newer cell

800G Ethernet specification

The 25 Gigabit Ethernet Consortium has decided to ditch its name as it heads off in search of serious speed with 800G specification. To mark the new name, the group has published 800G specification [PDF] that details its next step in Ethernet’s evolution. Ethernet standards group leaves its name in the dust as it details

Bidirectional optical device

Traditionally, an optical communication system would require two components at each end: transmitter and receiver. It has been known that LEDs can act as photo sensors, but they have not been very practical for optical communications applications. Researchers have now shown switching between LED and photodetector modes on new type component quickly enough for real-time