Glossary
B-4 Centillion 1200N ATM Switch User Manual
NTP 297-8103-903
ADPCM
Adaptive Differential Pulse Code Modulation: A reduced bit rate variant of PCM
audio encoding (see also PCM). This algorithm encodes the difference between an
actual audio sample amplitude and a predicted amplitude and adapts the resolution
based on recent differential values.
ADTF
ACR Decrease Time Factor: This is the time permitted between se nding RM-c ells
before the rate is decreased to ICR (Initia l C ell Rate). The ADTF range is 0.01 to
10.23 sec. with granularity of 10 ms.
AFI
Authority and Format Identifier: This identifier is part of the network level ad dress
header.
Agent
Acts on behalf of another person or thing, with delegated authority. The agents
goals are those of the entity that created it.
Aggregation Token
A number assigned to an outside link by the border nodes at the ends of the o utside
link. The same number is associated with all uplinks and induced uplinks associated
with the outside link. In the parent and all higher-leve l peer gro up, all upl inks with
the same aggregation token are aggregated.
AHFG
ATM-attached Host Functional Group: The group of functions performed by an
ATM-attached host that is participating in the MPOA service.
AI
Artificial Intelligence: Perhaps the next phase of computing. The present form of
IA in computer software are called Expert or Knowledge Based systems.
AI
Signaling ID assigned by Exchange A.
AIM
ATM Inverse Multiplexer: A term discontinued because of conflict with an
established product. Refer to AIMUX.