Telecom and Networking

Fiber visual fault locator videos

Last year I made a posting on Cheap fiber optic visual fault locator. It told about 1mW 5KM Red Light Pen Visual Fault Locator Fiber Optic Laser Cable Tester Meter puts out highly visible red light into a fiber optic cable that has ST, SC and FC optical connectors.The universal fiber connector worked well with single-mode

High-speed digital: 112 is the new 56 | EDN

https://www.edn.com/design/test-and-measurement/4460312/High-speed-digital–112-is-the-new-56 EDN magazine reports that at DesignCon 2018, 112 Gbps was all over the conference and exhibit hall. Even just a year ago, engineers were still talking more about 56 Gbps speeds than 112. This year, all agree that 56 Gbps speeds have been achieved. It’s time to move on. OIF-CEI 4.0, which included clauses

NRZ is dead, but not everywhere | EDN

https://www.edn.com/electronics-blogs/rowe-s-and-columns/4460291/NRZ-is-dead–but-not-everywhere PAM4 modulation is everywhere. “Five years ago, PAM4 was a concept” “PAM4 is being deployed everywhere except in short-reach links.” “DSP is enabling PAM4 optical channels” PAM4 has won the battle in fiber-optic and other medium and long-reach applications.

Finland is the Mobile Data Capitol of the World – IEEE Spectrum

https://spectrum.ieee.org/tech-talk/telecom/wireless/what-the-finnish-obsession-with-mobile-data-says-about-5g It seems that we really need 5G in Finland before 4G slows down too much due high use of it. Several factors make Finland a potential sandbox for 5G developers: the average person in Finland used about 20 gigabytes (GB) of mobile data in December 2017, a dramatic rise from the 2016 average of

Ethernet in the first mile

https://en.m.wikipedia.org/wiki/Ethernet_in_the_first_mile I came by a device with 2BASE-TL ports in it. Google search revealed that this standard was made by IEEE Ethernet in the first mile (EFM) working group. It standardizes networking techbologies for the customer’s point of view it is their “first” mile, although from the access network‘s point of view it is known as the “last mile“.  I know

Zyxel gigabit switch

I decided to replace my aging Zyxel and Netwjork 100 Mbit/s Ethernet switched with new gigabit models. I decided to get two ZyXEL GS-108S v2 Media Switch as replacement for those. The Zyxel GS-108S v2 10/100/1000 Mbps switch is designed to provide reliable high-performance media network connectivity – that’s what I need. The Zyxel GS-108S

Brotli compression algorithm for faster web

https://opensource.com/article/17/1/brotli-compression-algorithm?sc_cid=70160000001273HAAQ Brotli is a new open source compression algorithm designed to enable an Internet that’s faster for users. While the Brotli algorithm was announced by Google in September 2015, only recently have the majority of web browsers adopted it and HTTP servers started to offer Brotli compression. Brotli accomplishes better than gzip compression by making use of a

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