I saw this cable tracer equipment in use few days ago connected to a telephone cable. Here is the device connected to the cable. Closer view of the device reveals code CTT45 type code and manufacturer name VESALA. It is a product made by a Finnish company VESALA. The CTT45 is the transmitter part of →
Monday October 2021 was an Internet outage day. Many Facebook users faced outage and felt they had “internjet” instead of Internet. Also ePanorama.net has few hours outage. ePanorama.net went down few hours earlier. When I got my server up, in few hours Facebook was able to get their site up. Interesting correlation, but correlation does →
Usenet is a worldwide distributed discussion system available on computers. It was developed from the general-purpose Unix-to-Unix Copy (UUCP) dial-up network architecture. Basically format and transmission of Usenet articles is similar to that of Internet e-mail messages. Usenet started to operate at 1980 and I started using it in 1989. Users read and post messages →
Ethernet has risen to the top of the communications networking industry as a standard that dominates the data center down to the PC. Compatibility between old and new versions of Ethernet is legendary. The Ethernet Alliance has started an ongoing oral history, The Voices of Ethernet, in the form of video interviews of key players →
The Western Electric Model 500 and its subsequent variants were so ubiquitous that you almost couldn’t go anywhere without seeing one, especially in the United States. You have seen and heard this literal fixture of American life phone on countless of TV series and movies. Unfortunately many producers have been a little lazy and did →
Ethernet Killer is well known meme in many versions. Fiftythree.org presents: The Etherkiller and Friends says” “It all started one day with this guy, the origional Etherkiller, developed with a few misc parts to warn new users that the IT department is not to be messed with. You too can make one at home, connect →
I got 10BASE-T and 100BASE-TX Ethernet running through this over voltage protector. They are nor designed for faster data rate. Those protectors are designed to protect two 100 ohms wire pairs. They are designed to work well up to 60 MHz signal and have low capacitance (around 30 pF between wire pair wires). Links to →
Here is a collectio of adapters for different phone line connectors around the world. Those telephone connector adapters are designed to connect RJ11/12 plug cable to wall phone outlet on different countries. Different countries use or used to use different type telephone connectors on wall outlets. Those adapters were are used convert one country specific →
Is there something about a stray cable that makes your eyebrow twitch? Driven mad by your colleagues making a mess with fiber optic lengths, each one a greater trip-hazard than the last? Well, we’ve got the solution for you. Don’t view it as a chaotic mess. Look at it, and imagine it’s art Server Cable →
Old telephone cables are being pulled from the ground to make room for new fiber optic cables in Helsinki Finland. Bye bye PSTN. According to plans they will be gone in few years. Here they are pulling out the old telephone cable. Freshly pulled out “filled liquorice”. Old telephone wires to carry PSTN, ADSL and →