CCC event ISDN/POTS network

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@chaos.social "Chaotisch-Elektronische Fernkopie" ist absofort unter 919977 als Faxabruf veruegbar. #39c3 @c3fax@mastodon.social @eventphone@chaos.social

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@mastodon.social #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

c3isdn operations is now also reachable by fax at 91061 and isdn videotelephony at 91092 #39c3 @c3fax@mastodon.social

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

In case you're wondering: Yes, there will again be an ISDN + POTS network at #39C3 - you can follow our planning at https://discourse.osmocom.org/t/ewsd-for-39c3-ccc-congress/2321/18 and at the periodic online meetings we're holdoing for coordination. Let us know if you want to help out!