Cisco Prisma II Installation Manual page 170

Glossary
DOCSIS
Data Over Cable service Interface Specification.
DRR
dual reverse receiver.
E
EDFA
erbium doped fiber amplifier. Optical fibers doped with the rare earth element, erbium,
which can amplify light in the 1550 nm region when pumped by an external light source.
EDR
enhanced digital return. See bdr.
EIA
Electronic Industries Association. A United States association that provides standards for use
between manufacturers and purchasers of electronic products.
EMC
electromagnetic compatibility. A measure of equipment tolerance to external electromagnetic
fields.
EMT
externally-modulated transmitter.
ESD
electrostatic discharge. Discharge of stored static electricity that can damage electronic
equipment and impair electrical circuitry, resulting in complete or intermittent failures.
H
HD
high density.
I
I/O
input/output.
168