Lucent Technologies SLC ConnectReach User & Service Manual page 523

Glossary 363-208-050
Ethernet — A standard networking protocol widely used in local area networks for connecting often
dissimilar devices. Invented by the Xerox Corporation and developed jointly by Xerox, Intel, and Digital
Equipment Corporation. Ethernet networks use carrier sense multiple access/collision detect (CSMA/CD)
and run over a variety of cable types at 10 or 100 Mbps. Ethernet is similar to the IEEE 802.3 series of
standards.
F
fastpath — In statistics reports, such as IP statistics, the number of packets sent by means of the fastpath
route.
FDL — Facility Data Link. An embedded overhead channel with the ESF format traditionally used for
maintenance messaging within a carrier network. FDL uses the 193rd bit and is a four kb/s bandwidth.
Firewall — A combination of hardware and software which limits the exposure of a computer or group of
computers to an attack from outside. A network-level firewall, or packet filter, examines traffic at the
network protocol packet level.
fragments — In statistics reports, such as IP statistics, the number of packets so long they had to be
fragmented.
fragtimeout — In statistics reports, such as IP statistics, the number of events in which there is a time-out
due to a delayed fragment.
Frame Relay — A packet switching protocol that performs error checking and efficiently handles
high-speed, bursty data over wide area networks.
Framing Bit — A bit used for frame synchronization.
Framing Error — Occurs when framing bits are set improperly, or when the two ends of a circuit are
configured for different framing formats.
FTP — File Transfer Protocol. A protocol used for reliable file transfers.
FXO — Foreign Exchange Office. An analog trunk interface which may be connected to a PBX or to the
local public switched telephone network (PSTN) central office. The FXO interface may be configured in
either loop-start or ground-start mode.
FXS — Foreign Exchange Station. An analog line interface which may be connected to a PBX or directly to
a telephone station set. The FXS interface may be configured in either loop-start or ground-start mode.
G
Gateway — A combination of hardware and software that links two different types of networks.
GL-5
Issue 4 June 2002