olemus
telefonisüsteemi teenus:
helistaja numbri teatamine kõne sihtnumbrile
=
a telephone service, that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up

ülevaateid
https://en.wikipedia.org/wiki/Caller_ID

http://apivio.com/wp-content/uploads/2016/03/APIVIO-terms.pdf

https://support.skype.com/en/faq/FA1248/what-is-caller-identification-and-how-do-i-set-it-up-in-skype

https://crtc.gc.ca/eng/archive/2018/2018-32.pdf

https://tools.ietf.org/id/draft-elwell-dispatch-identity-reqs-00.html

vt ka
- helistaja maskeerimine