News for hackers. Stuff that matters.

A comment on Ask HN: How did/does the "dial tone" work?.

Re:Ask HN: How did/does the "dial tone" work? by Hackbraten on Monday July 29, 2024 @08:02AM (#41099755)
Wikipedia has a couple of photos of the units that used to generate dial tones in the German PSTN:

https://de.wikipedia.org/wiki/Ruf-_und_Signalmaschine

[ Parent | on HN ]

There are no comments on this comment yet.