Lucent Technologies PacketStar PSAX, User Manual, Page: 364 / 405

255-700-243 Glossary-23
PacketStar
®
PSAX 12-Port Medium-Density DS1 Multiservice Module User Guide , Issue 1 Release 8.0
Glossary
ETSI European Telecommunications Standards Institute. Equiva-
lent to ANSI. ETSI is creating a single European telecommu-
nications system as part of the single European market pro-
gram.
European Telecommunications Stan-
dards Institute See ETSI.
events browser The events browser is a view of the received events contained
in
AQueView’s $OV_LOG/trapd.log and
$OV_LOG/trapd.log.old.
events log The HP OpenView Events Log is a central repository for all
incoming events received by the NNM ovtapd background
process.
excess burst size See Be.
extended superframe format See ESF.
F
facility interface code A numerical code designating a facility interface.
fault monitoring In network management, the set of functions that (a) detect,
isolate, and correct malfunctions in a telecommunications
network, (b) compensate for environmental changes, and (c)
include maintaining and examining error logs, accepting and
acting on error detection notifications, tracing and identifying
faults, carrying out sequences of diagnostics tests, correcting
faults, reporting error conditions, and localizing and tracing
faults by examining and manipulating database information.
fax demodulation/remodulation A technique for taking a Group III fax signal and converting it
from, or back to, its original 9.6 Kbps. For example, when a
sheet of paper is inserted into a fax machine, the fax machine
scans it to digital bits -- a stream of 9600 bps. Then, for trans-
mission over phone lines, the 9.6 Kbps is converted into an
analog signal. But if you wish to transmit the fax signal over a
digital line, it makes sense to convert it back to its original 9.6
Kbps. This means you can put several fax transmissions on
one 56 Kbps or 64 Kbps line -- the capacity you would nor-
mally need if you transmitted one voice conversation, or one
analog fax transmission.
FCS frame check sequence. Bits added to the end of a frame for
error detection.
FEC forward error correction. A combination of functions
designed to protect data transmission in a noisy communica-
tions environment, such as traffic transmitted across satellite
and line-of-sight radio-frequency circuits. Most of these types
of circuits transmit at the rate of 2.048 Mbps or slower. The
three stages of FEC are multiple redundancy addressing, cell
encoding, and cell scrambling.