Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 140)

Acronyms and Definitions
Glossary-20 Verilink Access System 2000: Basics
F-bits F-bits (framing bits) form the DS3
frame alignment signal. There are
28 F-bits per DS3 frame (four per
subframe). The F-bits are located
in the first bit position in blocks 2,
4, 6, and 8 of each subframe. The
frame alignment pattern, which is
repeated in every subframe, is
“1001”. The rate of framing bit
errors is a good in-service
approximation of the logical bit
error rate because of the number
and location of the framing bits.
FCC Federal Communications
Commission.
FDDI See Fiber-Distributed Data
Interface (FDDI) .
FDL See facility data link (FDL) .
FE See frame bit error (FE) .
FEAC See Far-end Alarm and Control
Channel (FEAC Channel) .
FEBE See far-end block error (FEBE) .
FE CCV Far-end C-bit Coding Violation. A
CP-bit parity error received by the
far-end CSU.
FE CES Far-end C-bit Error Second. A
second with one or more CCV s OR
one or more out-of-frame (OOF)
defects OR a detected incoming
AIS counted at the far-end CSU.
FECN Forward Explicit Congestion
Notification. When a frame relay
network experiences congestion,
the network sends a bit to the
receiving device to notify it that
congestion avoidance procedures
need to be initiated.
FE CSES Far-end C-bit Severely Errored
Second. A second with 44 or more
CCV s OR one or more out-of-
frame (OOF) defects OR a
detected incoming AIS counted at
the far-end CSU.
Federal Communications Commission The FCC is a board of
commissioners appointed by the
President under the Commissions
Act of 1934, with the authority to
regulate all interstate
telecommunications and
telecommunications standards
originating in the United States.