olemus
üks koondside liike, eritüübiliste sõnumite edastuse agregeerimine ühtse liidesega süsteemiks, hõlmab reaalajalise interaktsioonita sidet (meil, SMS, faks, kõnepost, videopost)
= one of the types of unified communication, the aggregation of transmission of different types of messages into a system with a single interface, includes communication without real-time interaction

ülevaateid
https://www.techopedia.com/definition/15623/unified-messaging-system-ums
https://en.wikipedia.org/wiki/Unified_messaging
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/10x/unified_messaging/guide/10xcucumgx/10xcucumg010.html

vt ka
- koondside