-48VDC was standard for powering telephone equipment, and is also common standar... | Hacker News

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p_l on Oct 29, 2024 | parent | context | favorite | on: Standardizing Automotive Connectivity

-48VDC was standard for powering telephone equipment, and is also common standard for direct current datacenter connections.

Signaling on POTS easily hit over 100V, btw.

amanaplanacanal on Oct 29, 2024 [–]

I remember getting zapped when the phone rang when I was a teenager back in the 70's. Good times.

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