628
Appendix C: Acronyms
(continued)
CW
Continuous wave
CWDM
Course wavelength division multiplexing
DBA
Dynamic bandwidth assignment
DBR
Distributed Bragg reflector
DCE
Dynamic channel equalizer
DCF
Dispersion compensating fiber
DCM
Dispersion compensating module
DFA
Doped-fiber amplifier
DFB
Distributed feedback (laser)
DGD
Differential group delay
DGE
Dynamic gain equalizer
DPSK
Differential phase-shift keying
DQPSK
Differential quadrature phase-shift keying
DR
Dynamic range
DS
Digital system
DSF
Dispersion-shifted fiber
DUT
Device under test
DWDM
Dense wavelength division multiplexing
DXC
Digital cross-connect matrix
EAM
Electro-absorption modulator
EDFA
Erbium-doped fiber amplifier
EDWA
Erbium-doped wave guide amplifier
EH
Hybrid electric-magnetic mode
EHF
Extremely high frequency (30-to-300 GHz)
EIA
Electronics Industries Alliance
EM
Electromagnetic
EMS
Element management system
EO
Electro-optical
EPON
Ethernet PON
ER
Extended reach
FBG
Fiber Bragg grating
FDM
Frequency division multiplexing
FEC
Forward error correction
FM
Frequency modulation
FOTP
Fiber Optic Test Procedure
FP
Fabry-Perot
FSK
Frequency shift keying
(continued)