- FDDI
- Fire
Wall
- Firewire
- FRAD
- Frame
Relay
FT1
- FXO
- FXS
|
FDDI (Fiber Distributed Data Interface) --
A standard for transmitting data on optical fiber cables at a rate of
around 100Mbps -about twice as fast as
T3.
Fire Wall-A
combination of hardware and software that separates Networks, or LAN's
into two or more parts for security purposes
Firewire
See
IEEE-1394
FRAD (Frame Relay Access
Device) -- FRAD, sometimes referred to
as a Frame Relay Assembler/Dissembler, is a box that encapsulates (puts
frame relay header and trailer information on) outgoing data packets and
decapsulates (removes frame relay headers and trailers from) incoming
packets. Since frame relay does not take responsibility for error
detection, the FRAD sometimes includes error detection. The FRAD is a
box, usually close to the user, that provides the interface between the
user and a network that uses frame relay. The FRAD is sometimes included
as part of a router. See:
Frame Relay
Frame Relay A DTE-DCE interface specification based on LAPD (Q.921),
ISDN version of LAPB (X.25 datalink layer). This specification that
originally produced by a consortium of StrataCom, Cisco, DEC and
Northern Telecom.
Frame relay is a system in which data (in the
form of packets) from different protocols such as Ethernet, X.25, and
the Internet Protocol (IP), is collected into "frames" or larger units
of transmission that are delivered in burst-like mode over a switched
connection that is, however, a "permanent virtual circuit" (PVC). A PVC
ensures that packets always arrive in the right order so that they can
be reassembled successfully. See:
ATM,
FRAD
Fractional T1 (FT1)
FXO (Foreign eXchange Office)
-- A MUX that Connects to POTS lines
that come from a CO and converts to E1 or T1. Basically does the
opposite of FXS lines.
FXS (Foreign eXchange
Subscriber) -- A MUX that feeds out POTS
lines for connection to a normal telephone set- which is usually
converted from E1 or T1. Basically does the opposite of FXO lines |