Harald "LaF0rge" Welte: Retronetworking at VCFB 2022

I'm happy to announce active participation at the Vintage Computing Festival Berlin 2022 in two ways:

Running a retronetworking exhibit on Modem and ISDN dial-up

Giving a talk on the Osmocom Community TDMoIP netwokr

The exhibit will be similar to the exhibit at the retrocomputing village of the last CCC congress (36C3): A digital telephony network with ISDN BRI and POTS lines providing services to a number of laptops with Modems and ISDN terminal adapters.

We plan to demo the following things: * analog modem and ISDN dial-up into BBSs ** text / ANSI interfaces via Telix, Telemate, Terminate ** RIPterm graphical interfaces * analog modem and ISDN dial-up IP/internet * ISDN video...

Retronetworking at VCFB 2022

I'm happy to announce active participation at the Vintage Computing Festival Berlin 2022 in two ways:

Running a retronetworking exhibit on Modem and ISDN dial-up

Giving a talk on the Osmocom Community TDMoIP netwokr

The exhibit will be similar to the exhibit at the retrocomputing village of the last CCC congress (36C3): A digital telephony network with ISDN BRI and POTS lines providing services to a number of laptops with Modems and ISDN terminal adapters.

We plan to demo the following things: * analog modem and ISDN dial-up into BBSs ** text / ANSI interfaces via Telix, Telemate, Terminate ** RIPterm graphical interfaces * analog modem and ISDN dial-up IP/internet * ISDN video...

Progress on the ITU-T V5 access network front

Almost one year after my post regarding first steps towards a V5 implementation, some friends and I were finally able to visit Wobcom, a small German city carrier and pick up a lot of decommissioned POTS/ISDN/PDH/SDH equipment, primarily V5 access networks.

This means that a number of retronetworking enthusiasts now have a chance to play with Siemens Fastlink, Nokia EKSOS and DeTeWe ALIAN access networks/multiplexers.

My primary interest is in Nokia EKSOS, which looks like an rather easy, low-complexity target. As one of the first steps, I took PCB photographs of the various modules/cards in the shelf, take note of the main chip designations and started to search for the...

Clock sync trouble with Digium cards and timing cables

If you have ever worked with Digium (now part of Sangoma) digital telephony interface cards such as the TE110/410/420/820 (single to octal E1/T1/J1 PRI cards), you will probably have seen that they always have a timing connector, where the timing information can be passed from one card to another.

In PDH/ISDN (or even SDH) networks, it is very important to have a synchronized clock across the network. If the clocks are drifting, there will be underruns or overruns, with associated phase jumps that are particularly dangerous when analog modem calls are transported.

In traditional ISDN use cases, the clock is always provided by the network operator, and any customer/user...

Одноплатник MangoPi MQ-Quad в форм-факторе Raspberry Pi Zero W всего за $26.70

Стартап Widora Technology представил одноплатник MangoPi MQ-Quad в форм-факторе Raspberry Pi Zero W. Плата основана на процессоре Allwinner H616 максимальная частота 1.5 ГГц, в состав процессора входит 4-ядра Arm Cortex-A53, ARM Mali-T720 GPU, на плате распаяна память объемом 1GB DDR3L и разведен 40-контактный разъем GPIO совместимый с Raspberry Pi. Плата удивляет малыми габаритами и хорошо подходит для компактных систем, так же благодаря низкой стоимости идеально подходит для образовательных задач.
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Free Stuff - August 2022

The August recipient for the Great Scott Gadgets Free Stuff Program is Trevor! Trevor is working on a project called Hack365 where he is attempting to blog about one hack (or make or break or fix or learn) each day until next DEF CON. We are excited by how enthusiastic Trevor is about documentation, sharing his experiences with the community, and learning new things. One of the projects Trevor plans to take on is learning about his ceiling fan’s RF receiver, which is an excellent place to start when you are learning about RF. Trevor plans to share his progress...

Новый одноплатник StarFive VisionFive 2 на 4-х ядерном RISC-V процессоре всего за $46

Совсем недавно программировали на Python и устанавливали Docker для Sipeed Lichee RV RISC-V. Модуль Lichee RV стал первым массовым дешевым решением на процессоре RISC-V с возможностью запуска Linux. Развитие архитектуры не стоит на месте, так компания StarFive, разработчик RISC-V процессоров, представила новый 4-х ядерный процессор RISC-V JH7110 с графическим ускорителем. Предыдущие процессоры, построенные на RISC-V ядрах, например Allwinner D1 (используется в модуле Sipeed Lichee RV), не содержат GPU, а значит, не позволяют запускать 3D приложения и игры. На новом одноплатном компьютере VisionFive 2 на процессоре RISC-V JH7110 с 3D GPU, размещено 8 ГБ ОЗУ, интерфейсы HDMI 2.0 и MIPI DSI,...

Dual Voltmeter for RV Electrical Systems

This post was written by Brent, one of Crystalfontz’s engineers.

I have an RV that has both a vehicle electrical system and a camper electrical system. I wanted a way to see the voltages of both systems at a glance while driving.

I tried some cheesey voltmeters from e-bay and some other cheesey voltmeters from Amazon but I was not happy with the accuracy or stability. I was not able to find a meter that would work well in a vehicle, show two voltages, and have good accuracy.

Time to make my own:

August update: RISC and reward

This month we take a close look at the Star64, check out PineBuds (Pro) progress and discuss the Pinecil V2. I also come bearing good news concerning the PinePhone Pro, which has seen a small but significant hardware redesign and some important software updates.

A response to Martijn's blog

We rarely, if ever, make responses to blog posts or articles. In fact, there is only one instance that I can think of when we did so. So then, somewhat uncharacteristically, this is a response post to Martijn Braam’s blog in which he explains why he left the PINE64 community.