http://www.articleheaven.net en-us editorial@articlealley.com The history of the PABX The PBX was first used by operators running company switchboards and, with the advent of the automatic system, two terms were coined to differentiate between the automatic and the manual systems: • PABX: Private Automatic B... http://www.articleheaven.net/pabx-phone-system-installation-878209.html 05th May 2009