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g-7
GLOSSARY
EPROM - Erasable Programmable Read Only Memory (See PROM.)
ES (End System) - a system in which an ATM connection is terminated or ini-
tiated. An originating end system initiates the ATM connection, and a termi-
nating end system terminates the ATM connection. OAM cells may be
generated and received.
Ethernet - a 10-Mbps, coaxial standard for LANs in which all nodes connect
to the cable where they contend for access.
Fairness - as related to Generic Flow Control (GFC), fairness is defined as
meeting all of the agreed quality of service (QoS) requirements by controlling
the order of service for all active connections.
FCC - a board of commissioners appointed by the President under the Com-
munications Act of 1934, with the authority to regulate all interstate telecom-
munications originating in the United States, including transmission over
phone lines.
FDDI (Fiber Distributed Data Interface) - high-speed data network that uses
fiber-optic as the physical medium. Operates in similar manner to Ethernet or
Token Ring, only faster.
FDM (Frequency Division Multiplexing) - a method of dividing an available
frequency range into parts with each having enough bandwidth to carry one
channel.
FEBE (Far End Block Error) - an error detected by extracting the 4-bit FEBE
field from the path status byte (G1). The legal range for the 4-bit field is
between 0000 and 1000, representing zero to eight errors. Any other value is
interpreted as zero errors.
FERF (Far End Receive Failure) - a line error asserted when a 110 binary pat-
tern is detected in bits 6, 7, 8 of the K2 byte for five consecutive frames. A line
FERF is removed when any pattern other than 110 is detected in these bits for
five consecutive frames.
FIFO (First-In, First-Out) - a method of coordinating the sequential flow of
data through a buffer.
Flag - a specific bit pattern used to identify the beginning or end of a frame.
Frame - a variable length group of data bits with a specific format containing
flags at the beginning and end to provide demarcation.
Frame Relay - a fast packet switching protocol based on the LAPD protocol of
ISDN that performs routing and transfer with less overhead processing than
X.25.