olemus
mobiiltelefoni ühendamine arvutiga, enamasti andmekaabli abil, tavaliselt Internetti pääsemiseks, st telefoni kasutamiseks modemina; enamasti on see teenus kallim kui pääs otse telefonilt

Wiktionary:
2. (Internet) the connection of a personal computer to a mobile phone so as to obtain wireless Internet access from the computer

ülevaateid
https://en.wikipedia.org/wiki/Tethering
https://3g.co.uk/guides/tethering-everything-you-need-to-know
https://www.techopedia.com/7/30061/networking/what-is-the-difference-between-a-mobile-hotspot-and-tethering