A7 InterfaceA7 Interface The A7 interface carries signaling information between a source BS (Base Station) and a target BS. ... View more
A8 - Ciphering Key Generating Algorithm A8This algorithm is used in conjunction with Ki , the authentication key, and RAND (Random Number) to generate Kc (Cipher Key). This is used with A5/X t... View more
A8 InterfaceA8 Interface The A8 interface carries user traffic between the BS (Base Station) and the PCF (Packet Control Function). ... View more
A9 InterfaceA9 Interface The A9 interface carries signaling information between the BS (Base Station) and the PCF (Packet Control Function). ... View more
AA - Abbreviated AlertAn Abbreviated Alert is used to remind the subscriber that previously selected alternative routing features are still active. ... View more
AAA - Access, Authorization, and AccountingAuthentication, Authorization and Accounting systems implemented to securely determine the identity and privileges of a user and to track that user's ... View more
AAC - Advanced Audio CodecThe AAC features in both the MPEG-2 and MPEG-4 standards and was designed to be the successor to MP3. As such, AAC can operate using a variety of bitr... View more
AAL - ATM Adaptation LayerProvides a conversion function to and from ATM (Asynchronous Transfer Mode) for various types of information, including voice, video, and data. There ... View more
AAL1 - ATM Adaptation Layer 1The AAL1 adaptation layer is used to support continuous bit rate transmissions with a constant delay. ... View more
AAL2 - ATM Adaptation Layer 2AAL2 supports continuous bit rate transmissions, but also solves the problems of packetization delay and efficiency in the use of bandwidth resources.... View more
AAL5 - ATM Adaptation Layer 5The AAL5 adaptation layer was developed because of concerns about the overhead and performance of the AAL3/4 adaptation layers. The result is a very s... View more
AAR - Authorization Authentication RequestA Diameter message used in the PCC (Policy and Charging Control) framework which allows an Application Function to supply session related information ... View more
AB - Access BurstThis is used by GSM and GPRS mobiles when accessing the system. It is smaller than other transmissions since it is typically transmitted when timing i... View more
ABI - Application Binary InterfaceA binary interface for applications to utilize external and/or underlying software or hardware. ... View more
Abis InterfaceThe interface within the GSM architecture, between the BTS (Base Transceiver Station) and BSC (Base Station Controller). This interface is usually con... View more
ABM - Asynchronous Balanced ModeThis mode refers to the data link layer and identifies that a link has been established for sending information. The opposite state is ADM (Asynchrono... View more
ABMF - Account Balance Management FunctionThe ABMF is a logical element of the 3GPP OCS (Online Charging System) which is designed to track the remaining credit a subscriber has left on their... View more
ABNF - Augmented Backus-Naur FormABNF - Augmented Backus-Naur Form A standard programming syntax used to express the command messages in distributed programming.... View more
ABR - Area Border RouterA router that attaches to multiple areas of an OSPF based network. Area border routers run multiple copies of the basic algorithm, one copy for each a... View more
ABR - Available Bit RateQoS (Quality of Service) class defined by the ATM (Asynchronous Transfer Mode) Forum for ATM networks. ABR is used for connections that do not require... View more