Private company
UNIStim
Telecommunications protocol
UNIStim (or Unified Networks IP Stimulus) is a deprecated telecommunications protocol developed by Nortel (now acquired by Avaya) for IP phone (terminals and soft phones) and IP PBX communications. Most other manufacturers of IP PBX equipment (Aastra, Alcatel, Avaya, etc.) have followed the same path, developing their own proprietary protocols. These protocols are being gradually replaced or complemented by standardized protocols, including H.323 and (especially) SIP.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
Overview
See how the biggest companies compare on our leaderboards
UNIStim (or Unified Networks IP Stimulus) is a deprecated telecommunications protocol developed by Nortel (now acquired by Avaya) for IP phone (terminals and soft phones) and IP PBX communications.2
Links
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1WikidataUNIStim on Wikidata
- 2WikipediaUNIStim on Wikipedia