1R

Regeneration without reshaping or retiming

2R

Regeneration with reshaping but no retiming

3R

Regeneration with retiming and reshaping

AAL

ATM adaptation layer

ACTS

Advanced communications technologies and services

ADM

Add/drop multiplexer

AGC

Automatic gain control

AIS

Alarm indication signal

ANSI

American National Standards Institute

AOTF

Acousto-optic tunable filter

APD

Avalanche photodetector

APS

Automatic protection switching

AR

Anti-reflective

ASE

Amplified spontaneous emission

ATM

Asynchronous transfer mode

ATMOS

ATM optical switching

AWG

Arrayed waveguide grating

BCH

Bose-Chaudhuri-Hochquenghem (code)

BDI

Backward defect indicator

BER

Bit error rate

BLSR

Bidirectional line-switched ring

CBR

Constant bit rate

CGM

Cross-gain modulation

CLP

Cell loss priority

CMIP

Common management information protocol

CO

Central office

CORBA

Common object request broker

CPM

Cross-phase modulation

CRC

Cyclic redundancy check

CW

Continuous wave

DARPA

Defense Advanced Research Projects Agency

DBR

Distributed Bragg reflector

DCF

Dispersion compensating fiber

DCN

Data communications network

DCS

Digital crossconnect

DFB

Distributed feedback

DGD

Differential group delay

DM

Direct modulation

DPRing

Dedicated protection ring

DSB

Double sideband

DSF

Dispersion-shifted fiber

DSL

Digital subscriber loop

DTMF

Dielectric thin film multicavity filter

DWDM

Dense wavelength division multiplexing

EA

Electro absorption

EDFA

Erbium-doped fiber amplifier

EDFFA

Erbium-doped fluoride fiber amplifier

EMS

Element management system

ESCON

Enterprise serial connection

FCC

Federal Communications Commission

FDDI

Fiber distributed data interface

FDI

Forward defect indicator

FDM

Frequency division multiplexing

FEC

Forward error correction

FET

Field effect transistor

FOM

Figure of merit

FP

Fabry-Perot

FSAN

Full service access network

FSR

Free spectral range

Acronym

Expansion

FTP

File transfer protocol