Phone Tones - a podcast by TED

We unpack how touch tone dialing changed communication forever. Join us on a deep, quirky dive into telephone history. We’ll also deconstruct these sounds and reveal their hidden brilliance. Featuring author Annabel Dodd and telephone aficionado Jim Hebbeln of the Telecommunications History Group. 
20K is produced out of the studios of Defacto Sound and hosted by Dallas Taylor. 
Follow the show on Twitter & Facebook. Our website is 20k.org. 
Become a monthly contributor at 20k.org/donate. 
If you know what this week's mystery sound is, tell us at mystery.20k.org. 
Check out Pessimists Archive wherever you get your podcasts. 
Episode transcript, music, and credits can be found here: https://www.20k.org/episodes/phonetones 
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