Paradyne ACCULINK 316x User Manual
Page 207
ACCULINK 316x DSU/CSU
Glossary-2
December 1996
3160-A2-GB22-10
EER
Excessive Error Rate.
EON
End of Number.
ES
Errored second. A second with one or more ESF error events (one or more CRC6
error events or OOFs)
.
ESD
Electrostatic discharge.
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.
FCC
Federal Communications Commission.
FDL
Facility Data Link. The selected bits in the ESF format that are used for control,
monitoring and testing.
LBO
Line Build-out. The amount of attenuation of the transmitted signal that is used to
compensate for the length of wire between the transmitter and the receiver.
LCD
Liquid Crystal Display.
LED
Light-Emitting Diode.
LOF
Loss of Frame. Occurs when a DS1 terminal is unable to synchronize on the DS1
signal for some interval (nominally 2 1/2 seconds).
LOFC
Loss of Frame Count. A count of the number of LOFs declared.
LOS
Loss of Signal. The T1 line condition where there are no pulses.
MIB
Management Information Base. Database of managed objects used by SNMP to
provide network management information.
MUX
Multiplexer.
OOF
An error condition in which two out of four synchronization bits are in error.
PDV
Pulse Density Violation.
PPP
Point-to-Point Protocol. A link layer protocol used by SNMP.
PSTN
Public Switched Telephone Network.
QRSS
Quasi-Random Signal. A test pattern simulating a random pattern of digital ones
and zeros used to simulate normal transmission.
SDCP
Shared Diagnostic Control Panel.
SES
Severely Errored Seconds. A second with 320 or more CRC6 error events or one or
more OOFs occurring.
SLIP
Serial Line Internet Protocol. A link layer protocol used by SNMP.
SNMP
Simple Network Management Protocol. A generic network management system that
allows the device to be managed by any industry-standard SNMP manager.
UAS
Unavailable Seconds. A count of 1-second intervals when service is unavailable.
Vac
Volts alternating current.
Vdc
Volts direct current.
VF
Voice Frequency.
Yellow Alarm
An outgoing signal transmitted when a DS1 terminal has determined that it has lost
the incoming signal.
3000 Series Carrier
A rack-mounted device containing 17 slots in which to place circuit cards.