CCC event ISDN/PSTN networkIn case you didn't notice yet: #38C3 will have an actual 1990s circuit switched ISDN telephone exchange (Siemens EWSD) providing wired POTS and ISDN services on-site: https://youtu.be/qIpDiiJTZTA?feature=shared #retronetworking #ccc2024 #ccc #isdn
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