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Glossary
3160-A2-GB21-90 February 2001
GL-5
EIA
Electronic Industries Association. This organization provides standards for the data
communications industry to ensure uniformity of interface between DTEs and DCEs.
EIA-530-A
An Electronic Industries Association standard for a high-speed, 25-position, DCE/DTE
interface.
Enterprise MIB
MIB objects unique to a specific company’s devices.
enterprise-specific
trap
A trap unique to a specific company’s devices.
EON
End of Number.
error
A discrepancy between a measured or computed value or condition and the true or
specified value or condition.
ES
Errored Seconds. A second with one or more ESF error events (one or more CRC6 error
events or OOFs).
ESD
ElectroStatic Discharge. An undesirable discharge of static electricity that can damage
equipment and degrade electrical circuitry.
ESF
Extended SuperFrame. The T1 transmission standard that specifies 24 frames as an
extended superframe to be used for frame synchronization and to locate signaling bits.
Fact1
Factory 1 configuration area. The first of two configuration option sets that are preset at the
factory (read-only options).
Fact2
Factory 2 configuration area. The second of two configuration option sets that are preset at
the factory (read-only options).
failure
An uncorrected hardware error.
fault
An accidental condition that causes a functional unit to fail to perform its required function.
FCC
Federal Communications Commission. The Board of Commissioners that regulates all
electrical communications that originate in the United States.
FDL
Facility Data Link. The selected framing bits in the ESF format used in a wide-area link that
are used for control, monitoring, and testing.
fractional E1
Individual DS0 channels that may be sold separately or in groups to provide bandwidth that
is some fraction of the total E1 capability.
frame
One identifiable group of bits that includes a sequence of bits for control, framing, etc.
frame relay
A high-speed connection-oriented packet switching WAN protocol using variable-length
frames.
framing
A technique that separates bits into identifiable groups.
Generic-Interface
Extension MIB
An extension to MIB II that defines additional objects for control of generic interfaces in
MIB II.
Get command
(SNMP)
A command providing read-only access to SNMP MIB objects.
ground
A physical connection to earth or other reference point.
HDLC
High-Level Data Link Control. A communications protocol defined by the International
Standards Organization (ISO).
host
A computer attached to a network that shares its information and devices with the rest of the
network.
Hz
Hertz. A unit of frequency that equals one cycle per second.