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

http://www.plugthingsin.com/internet/mobile/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