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ACCULINK 317x E1 DSU/CSU
Glossary-4 December 1996 3170-A2-GB20-20
DSU Data Service Unit. Data communications equipment that provides an interface
between the DTE and the digital network.
DS0 Digital Signal Level 0. A 64 kbps standard signal or channel.
DS0 channel allocation
Assigning specific DS0 channels in the E1 DSU/CSU to specific interfaces
(Network, DTE Drop/Insert, etc.).
DS1/E1 MIB
Defines objects for managing E1 interfaces and supports the network and DTE
Drop/Insert interfaces on the E1 DSU/CSU.
DTE Data Terminal Equipment. The equipment, such as a computer or terminal, that
provides data in the form of digital signals.
DTE Dr
op/Insert interface The drop/insert interface that is labeled “DTE” on the rear panel of the E1
DSU/CSU.
DTLB Data Terminal Loopback. Loops the data received from the selected port, for all
DS0 channels allocated to the port, back out the port.
DTR Data T
erminal Ready
. V
.24 circuit 108/1, /2.
EDL Embedded Data Link. The 8 kbps in-band performance channel that provides
4 kbps of user bandwidth for the support of an SNMP management link.
EER Excessive Error Rate. An error rate that is greater than the threshold that has been
configured in the E1 DSU/CSU.
EIA Electronic Industries Association. An organization providing standards for the data
communication industry.
EIA 530A
An EIA standard for a high-speed, 25-position, DCE/DTE interface.
Enterprise MIB
MIB objects unique to Paradyne devices.
enterprise-specific trap A trap unique to Paradyne devices.
error A discrepancy between a measured or computed value or condition and the true or
specified value or condition.
ES Errored seconds. Seconds with one or more error events.
ESD Electrostatic dischar
ge. An undesirable dischar
ge of static electricity that can
damage equipment and degrade electrical circuitry.
E1 A wideband digital interface operating at 2.048 Mbps defined by CCITT standards
G.703 and G.704.
Fact Factory configuration area. A configuration option set that is preset at the company
(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. A board of commissioners that regulates
electrical communication systems that originate in the United States.
FDL Facility Data Link. The selected framing bits 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.