olemus
(a) marsruutimine telefonsidevõrgus
= routing in the telephone network
https://plus.maths.org/content/call-routing-telephone-networks
https://voipstudio.com/en/how-voip-calls-are-routed/
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/8x/uc8x/ovroutng.pdf
(b) sisenevate kõnede sautomaatne haldus
= a call management process that automatically queues and distributes incoming calls based on a predefined set of rules and criteria
https://www.ringcentral.com/call-routing.html