Telecom and Networking

Ethernet switch teardown

Here is tear-down of old Zyxel  ES-108 10/100Mbit/s Ethernet switch. I had one on my network for many years, but one day it stopped worked and started making whining noise. Look inside. Closer look to details. Main Ethernet switch chip is ADM6999 from ADMtek (now part of Infineon). In addition to it line transformers and power

Evolution of Mobile Communication from 1(G) to 4G, 5G, 6G, 7G … The cellular wireless Generation (G) generally refers to a change in the nature of the system, speed, technology and frequency. Each generation have some standards, capacities, techniques and new features which differentiate it from the previous one. Now 5G is hot technology at the top of the hype cycle. But that’s not the end

Severe flaw in WPA2 protocol leaves Wi-Fi traffic open to eavesdropping | Ars Technica An air of unease set into the security circles on Sunday as they prepared for the disclosure of high-severe vulnerabilities in the Wi-Fi Protected Access II protocol that make it possible for attackers to eavesdrop Wi-Fi traffic passing between computers and access points.  There is a proof-of-concept exploit called KRACK, short for Key Reinstallation Attacks. KRACK

Topological Laser Cavities Could Revolutionize Optoelectronics – IEEE Spectrum  A new type of laser cavity that builds off a Nobel-winning development in physics can take on any shape and switch the flow of light with a magnetic field. Kante and his colleagues describe their so-called topological cavities in the current issue of Science.  Normally, a laser cavity, where light amplification takes place, is shaped like

Tuning for Zero Packet Loss in Red Hat OpenStack Platform For Telcos considering OpenStack, one of the major areas of focus can be around network performance. While the performance discussion may often begin with talk of throughput numbers expressed in Million-packets-per-second (Mpps) values across Gigabit-per-second (Gbps) hardware, it really is only the tip of the performance iceberg. The most common requirement is to have

Delivering 5G mmWave fixed wireless access | EDN Mobile network operators view fixed wireless access (FWA) as the first application for 5G in millimeter wave (mmWave) spectrum. Fixed wireless access describes a wireless 5G connection between a centralized base-station and numerous fixed or nomadic user locations.  With regulatory rules defined, large amounts of spectrum already in the operators’ hands, and enough power output