Appendix A: Common Industry Acronyms

AAL		ATM Adaptation Layer
AARP		AppleTalk Address Resolution Protocol
ABM		Asynchronous Balanced Mode
ABR		Available bit rate
AC		Alternating current
ACD		Automatic call distribution
ACELP		Algebraic Code-Excited Linear Prediction
ACF		Advanced communication function
ACK		Acknowledgment
ACM		Address complete message
ACSE		Association Control Service Element
ACTLU		Activate logical unit
ACTPU		Activate physical unit
ADCCP		Advanced Data Communications Control Procedures
ADM		Add-drop multiplexer
ADPCM		Adaptive Differential Pulse Code Modulation
ADSL		Asymmetric Digital Subscriber Line
AFI		Authority and Format Identifier
AIN		Advanced Intelligent Network
AIS		Alarm Indication Signal
ALU		Arithmetic logic unit
AM		Administrative Module (Lucent 5ESS); Amplitude Modulation
AMI		Alternate Mark Inversion
AMP		Administrative Module Processor
AMPS		Advanced Mobile Phone System
ANI		Automatic Number Identification (SS7)
ANSI		American National Standards Institute
APD		Avalanche Photodiode
API		Application programming interface
APPC		Advanced Program-to-Program Communication
APPN		Advanced Peer-to-Peer Networking
APS		Automatic Protection Switching
ARE		All Routes Explorer (Source Route Bridging)

ARM		Asynchronous Response Mode
ARP		Address Resolution Protocol (IETF)
ARPA		Advanced Research Projects Agency
ARPANET		Advanced Research Projects Agency Network
ARQ		Automatic Repeat Request
ASCII		American Standard Code for Information Interchange
ASI		Alternate Space Inversion
ASIC		Application-Specific Integrated Circuit
ASK		Amplitude Shift Keying
ASN		Abstract Syntax Notation
ASP		Application service provider
AT&T		American Telephone and Telegraph
ATDM		Asynchronous Time...

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