Technology Acronyms

AAL - ATM Adaptation Layer

AAL1 - ATM Adaptation Layer Type 1

ABR - Available Bit Rate

AC - Alternating current

ACK - Acknowledgement

ACO - Alarm Cut-Off

ACR - Available Cell Rate

ADPCM - Adaptive Differential Pulse Code Modulation

ADSL - Asymetric Digital Subscriber Line

AHFG - ATM-attached Host Functional Group

AII - Active Input Interface (Used in UNI PMD specs for Copper/Fiber)

AIM - ATM Inverse Multiplexer

AIS - Alarm Indication Signal (UNI Fault Management)

AMI - Alternate Mark Inversion

ANS - ATM Name Service

ANSI - American National Standards Institute

AOI - Active Output Interface (Used in UNI PMD specs for Copper/Fiber)

AP - Applicant

API - Applications Programming Interface

ARP - Address Resolution Protocol

ARPANET - Advanced Research Projects Agency Network

ASCII - American Standard Code for Information Interchange

ASN - Abstract Syntax Notation One

ASN.1 - Abstract Syntax Notation One

ATE - ATM Terminating Equipment (SONET)

ATM - Asynchronous Transfer Mode

ATMARP - ATM Address Resolution Protocol

ATMF - ATM Forum

AUI - Attachment Unit Interface

AVSSCS - Audio-Visual Service Specific Convergence Sublayer (ATM Forum)

AWG - American Wire Gauge

B - Bearer (64Kbps DS-0 Channel)

BD - Battery On Discharge

B8ZS - Bipolar 8 Zero Substitution

BEAR Form - Billed Entity Applicant Reimbursement Form (Form 472)

BECN - Backwards Explicit Congestion Notification

BER - Basic Encoding Rules (ASN.1)

BER - Bit Error Rate (link quality specification/testing)

BGP - Border Gateway Protocol

B-HLI - Broadband High Layer Information

B-ICI - Broadband Inter-Carrier Interface

BIP - Bit Interleaved Parity

BIPV - Bit Interleaved Parity Violation

BIS - Border Intermediate System (ATM Forum, PNNI SWG)

B-ISDN - Broadband Integrated Services Digital Network

B-ISUP - Broadband Integrated Services User Part

B-ISSI - Broadband Inter-Switching System Interface

BITS - Building Integrated Timing Supply

B-LLI - Broadband Low Layer Information

BOC - Bell Operating Company (or RBOC)

BOM - Begining of Message

BOOTP - Bootstrap Protocol

BPDU - Bridge Protocol Data Unit

bps - bits per second

BRI - Basic Rate Interface

BSP - Bell System Practice

BSS - Broadband Switching System

BT - Burst Tolerance

BUS - Broadcast Unknown Server