Willow Brook 💜Jul 18, 2025

What do you fucking MEAN

> The pi day themed St. Louis area phone (314) 159-2653 is not a valid phone number since 1950s era central office rotary phone switching equipment ignored single pulses in the first and second positions. 159 is thus not among the 540 valid central office codes.

Show threadKevin Karhan 

@Paradox LMAOOOO!

The #US still supports #ImpulseDialing?

Jul 18, 2025 at 2:55amWeb
Show threadWillow Brook 💜Jul 18, 2025

@kkarhan Apparently yes.
I've just learned this is a thing.

Something to do with landline regulations.

Show threadKevin Karhan Jul 18, 2025
@Paradox Germany canceled that in 1997 with the nationwide implementation of #HyTNAS (ADSL Annex B + ISDN + PSTN on a single pair).
Show threadMichael DwyerJul 18, 2025
@kkarhan @Paradox For some time, customers were charged extra for Touch-Tone (tm)(r) service. I can imagine no small number of users maintained their pulse dial phones out of spite.