411 REFERENCE · Wiktionary
IPBX
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Proper noun
en telecommunications en Internet Protocol private branch exchange: A business telephone system designed to deliver voice over a data network and interoperate with the normal Public Switched Telephone Network (PSTN).
See also
IP (Internet Protocol)
PBX (Private Branch Exchange)
VOIP