The acronym PABX stands for a Private Automated Branch Exchange. A PABX is a type of telephone network used by call centres and medium-to-large companies. This exchange system provides multiple lines for outside callers to reach staff, as well as numerous external lines for those in the organisation to utilise.
Private automatic branch exchanges typically offer a number of features to make communicating significantly more convenient. Key components include toggle, conference calls and picking up calls. Toggle is used to switch back and forth between multiple calls. With call pick-up you can answer a call to an unstaffed phone from your own phone. With conference call several subscribers can be included in a call and everybody can talk with all parties to the call. Other typical features of private automatic branch exchanges are callback, call waiting, call transfer and call forwarding.