Paradyne 3150 Operator's Manual page 222

Glossary
DSX-1 Digital Signal Cross Connect level 1. An interconnection point for terminals, multiplexers
and transmission facilities.
DTE Data Terminal Equipment. The equipment, such as a computer or terminal, that provides
data in the form of digital signals for transmission.
DTE interface The DTE interface on the rear panel of the CSU.
DTMF Dual-Tone Multi-Frequency. A signaling method using two voice frequencies to designate
the tones used for touch-tone dialing, as distinguished from pulse dialing.
DTR Data Terminal Ready. A signal from the DTE to the modem, sent via Pin 20 of the
EIA-232 interface (V.24 circuit 108/1, /2), that indicates the DTE is turned ON and
connected to the modem.
A wideband digital interface operating at 2.048 Mbps, defined by ITU recommendations
E1
G.703 and G.704. It is used primarily outside North America.
EER Excessive Error Rate. An error rate that is greater than the threshold that has been
configured in the device.
Enterprise MIB MIB objects unique to a specific company's devices.
A trap unique to a specific company's devices.
enterprise-specific
trap
End of Number.
EON
A discrepancy between a measured or computed value or condition and the true or
error
specified value or condition.
Errored Seconds. A second with one or more ESF error events (one or more CRC6 error
ES
events or OOFs).
ElectroStatic Discharge. An undesirable discharge of static electricity that can damage
ESD
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.
Ethernet A type of network that supports high-speed communication among systems. It is a widely
implemented standard for LANs. All hosts are connected to a coaxial cable where they
contend for network access using a Carrier Sense, Multiple Access with Collision Detection
(CSMA/CD) paradigm.
Fact1 Factory 1 configuration area. The first of two configuration option sets that are preset at the
factory (read-only options).
Factory 2 configuration area. The first of two configuration option sets that are preset at the
Fact2
factory (read-only options).
An uncorrected hardware error.
failure
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 T1 Individual DS0 channels that may be sold separately or in groups to provide bandwidth that
is some fraction of the total T1 capability.
frame One identifiable group of bits that includes a sequence of bits for control, framing, etc.
GL-4
March 2001 3150-A2-GB24-10