Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 142)

Acronyms and Definitions
Glossary-22 Verilink Access System 2000: Basics
Frame Relay Access Device (FRAD) The device which adds control bits
to end-user data to create frames
in the frame relay standard format
and then transmit them toward the
network. The FRAD at the receiving
end strips away these control bits
in order to present the original
data to the end-user device. A
FRAD can be a standalone unit, or
part of a switch, router,
mulitiplexer, etc.
frame relay frame A variable length unit of data in
standard frame relay format for
transmission through a frame relay
network.
framing bits Bits used within the frame
alignment signal.
front-end processor A special purpose computer
dedicated to handling
communication links for a host
computer.
FS Failed second. See unavailable
second (UAS) .
FSS See failed signal state (FSS) .
FT1 See fractional T1 .
full duplex Communications in which both
end points can send at the same
time.