olemus
kõnekeskne side, näiteks tavaline telefonside
= communication of sound over a distance using wire or wireless telephones and related technology

ülevaateid
https://comtecsystems.net/blog/the-evolution-of-voice-communication-past-present-and-future/
https://www.quora.com/What-are-some-examples-of-audio-communication

vt ka
- analoogtelefonside
- netitelefon
- telefonside