You could use it if you had another one with a female headphone jack. You could play your music to a speaker in another room if you have Ethernet in both rooms. Copper is copper.
I’ve done this. I’ve made speaker wire to ethernet adaptors to connect speakers in a different room through the walls to an amp. Feels and probably is so wrong.
It really depends how much power you put through the cable, ethernet is something like 0.2 mm2 per core. You’d definitely want to double up cores.
Fun fact: usb uart to audio jack is actually a thing: https://ae01.alicdn.com/kf/HTB1G43QaOnrK1RjSsziq6xptpXaN/win8-10-android-mac-pl2303hxd-usb-uart-ttl-to-2-5mm-audio-jack-serial-adatper-cable.jpg
Some older android phones used the audio jack double duty as a serial debug console, the nexus 5 for example.
You can turn literally any signal into another it’s great.
Yes, it’s awesome!
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How else did you think they got the dialup noises to play?
Dialup didn’t use ethernet.
Care to elaborate? I can’t find any information searching online.
No.
Ethernet is rj-45, dialup used 11/25