How to realize the possibility of using a headset (headphones + microphone) when switching between a computer and a smartphone?

Question

Computers

Is there such a device as a source switch for a headset?
A regular headset (headphones + microphone) is connected to the computer.
And it would be convenient to communicate through it on a smartphone.
To do this, you need an adapter (2-in-1 3.5mm jack - these are sold, this is not a problem) and plus some kind of "switcher / selector / mixer" that could mechanically switch which pair of wires is currently connected to the headset - from computer or smartphone.
Is it possible?

Answer 1

Four-pole toggle switch?

spoiler

Answer 2

Something like this, I imagine.