Glossary of Acronyms and Terms
Bhumip Khasnabish · 2003
AAA Authentication, authorization, and accounting; a suite of network security services that provides a major framework through which access control can be implemented on any access server.AAL ATM (defined later) Adaptation Layer; the functions of translating application layer data or information into size and format of ATM cells.AAL-1 through AAL-5 have been defined; AAL-1 is used for constant bit rate and circuit emulation services for transmission of real-time voice and video, AAL-5 is used for variable bit rate connection-oriented and connection-less services (e.g., for IP over ATM).ACD Automatic call distributors; ACDs are designed to handle incoming phone calls or to make outgoing calls.Using ANI/DNIS, information collected via IVR, and by looking in a database (local or distributed, for intelligent call routing) ACDs can answer an incoming call by playing a prerecorded message or can put the caller to the 'queue' from which a call agent (or an operator) is answering the incoming calls.ACELP Algebraic-code-excited linear-prediction; a technique utilized by G.723 voice coding scheme to generate 5.3 Kbps streams of data.ACM Address complete message; an ISUP message for telephone call setup and control using the SS7 network.This message is used to indicate the completion of address information.1 As the computer telephony integration (CTI) and voice over IP (VoIP) technologies evolve, many new acronyms and terms will be introduced; up-to-date information on these can be found at the following websites: www.ietf.