Glossary

3G: Third generation of mobile communications systems, based on broadband technology. 3G follows 2G, which refers to mobile systems such as GSM, using digital speech-coding technology, and 1G (earlier analogue mobile telephony systems). 2.5G refers to intermediate technologies between 2G and 3G such as GPRS-based GSM. An example of a 3G system is ETSI s UMTS.
3GPP: 3G Partnership Project. This was originally pioneered by ETSI and it focuses on GSM evolution to 3G. Earlier ETSI work for GSM was integrated into 3GPP to achieve a single UMTS development stream. 3GPP provides the currently prevailing worldwide standard for the core network architecture and protocols, although the radio interface standard used is subject to regional differences because of spectrum allocations and licensing variations.

See also .

ACM: Address Complete Message. This is an ISUP (and TUP) message, sent by a destination node and relayed back to the call origination node, in reply to an IAM (or IFAM). It indicates that the address has been checked and found to be valid.
ACP: Action Control Point, the term used for a network switch in the early DSDC number translation system offered by AT&T in the USA.
AD: Adjunct this is a CS-1 physical (network) entity that is similar to an SCP, but is more closely coupled (using faster signalling than SS7) to the SSP.
AIN: Advanced Intelligent Network. This term was coined in the early 1990s by Bellcore (now Telcordia) for a set of widely accepted IN standards for the...

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Intelligent Networks: Principles and Applications