Glossary A |  B |  C |  D |  I |  L |  P |  Q |  S |  T |  U |  V |  ACD / Automatic Call Distribution An automated system for answering,queuing and distributing incoming calls to a number of agents.Popular in call centres,ACD systems also provide statistics,such as the number of calls waiting, average length of call etc., which can be incorporated into historical reports or displayed in real-time on electronic wallboards. ADSL / Asynchronous Digital Subscriber Line A broadband technology that delivers very high data transfer speeds (potentially 10 times faster than ISDN)phone lines. Auto Attendant An automated answering system that uses prompts to direct callers to the right department or extension e.g. 'For sales press 1'.