Tomorrow (2026-04-01) night we'll have a RetroNetCall about the initial planning for the ISDN network at the CCC congress this year. #40c3 #retronetworking #pstn #pots #isdn #ccccongress https://osmocom.org/news/325
retronetcall on #39c3 @c3isdn network is starting now at https://osmocom.org/RetroNetCall
tonight we'll have a review of the #39c3 ISDN/PSTN network as first RetroNetCall of 2026. Join us for a chat about how the network was built, how well it worked, what improved over #38c3 and what to do better at #40c3 - https://osmocom.org/news/320 #retronetworking #ISDN
Die Faxvorlage der @ChaosPost "Chaotisch-Elektronische Fernkopie" ist absofort unter 919977 als Faxabruf veruegbar. #39c3 @c3fax @eventphone
with some delay, our fax polling badge for #39c3 is finally live: You an use a fax machine to perform fax polling from 919989 and will receive a cerificate of achieving fax polling with QR code for the related badge you can add to your 39c3 event hub user profile. #telefax @c3fax #retronetworking
c3isdn announces availability of IPv6 access via PPP dialup over analog Modems! Dial 91910 and username 39c3 / password 39c3. #modem #retronetworking #retrocomputing #39c3 #dialup
We have various equipment like Auerswald PBXs and ISDN video phones or fax machines that can be borrowed tomorrow if you want to play with more retro tech from your analog or isdn connection at #39c3 #retronetworking
Get your DialIn #39c3 Badge now by dialing 91251 from your @c3isdn enabled modem!
https://events.ccc.de/congress/2025/hub/en/badge/detail/0383469b-9746-4f40-8594-9c722be1c9c1
Analog and ISDN dialup is now operational in the on-site telephony network at #39c3. Just dial 919800 from your modem or ISDN-TA for PPP [any user name]. You will get a public IPv4 address with inbound connections filtered
Make sure to bring your modems, fax machines, ISDN terminal adapters, phones, BTX terminals, Minitel, video phones and other #retronetworking gear to #39C3 and get connected to the on-site #ISDN network. More information at https://isdn-museum.de/ccc/39c3 #retronetworking #isdn #telephony
Huge Update for the #39c3 Eventpage: You know can search the @eventphone phonebook again aswell as send Post via the @ChaosPost
Last minute edition to the three additional Nokia EKSOS V5.2 access multiplexers: wooden stands/feet for mechanical protection and air convection. This is where your subscriber line terminates. 39C3 has more ISDN/POTS points of presence across the #39c3 venue than 38C3. #retronetworking #aufbauleaks #isdn
ISDN and POTS subscriber line termination equipment, SDH multiplexers, test equipment, fax machines, fax server, NTBAs, cables, postcards, stickers etc. fully loaded and tomorrow morning on its way to #39c3 #aufbauleaks #isdn #retronetworking
The Siemens EWSD digital telephone exhcange for our ISDN+POTS network has arrived at #39C3 in Hamburg https://tube.tchncs.de/w/8YQy365nodY6tcES6gDXX6 https://www.youtube.com/watch?v=p-JyEEuwfdk
#39c3 is soon upon us, so we integrated the News aswell as the Hashtag to the Gopher hole.
As soon as more content drops we will have that as well so stay tunned :3
The extension registration for #39C3 is now open!
And because we love good timing, we're dropping another highlight: the “Dawn of ISDN” video is now officially released!
https://www.youtube.com/watch?v=8iGkelQyb68
Important note: Permanent Reservations expire on December 24, 2025 – after that they will be automatically returned to the pool.
Have fun registering, and see you soon in the best network!