English to German Tech/Engineering Telecom(munications) Enterprise Telephone System

Hello All,

I'm working on a document describing the innumerable features of an enterprise telephone system. One of its functions is "Zone Paging": The administrator (or someone else with special privileges) can make a public announcement to a particular predefined group of people (a zone). It works like a page because it will blare out of the zone members' telephone speakers (unless they're currently on the phone themselves), similar to a public address system.

I am at a loss (or just suffering from brain freeze) what to call this in German. "Gruppenruf" or "Zonenruf" just sounds weird and is not accurate enough anyway.

I am open to ANY and all suggestions. Help, please!

Many thanks in advance!
Gabriele