Verilink AS2000: The Basics (880-502981-001) Product Manual Instrukcja Użytkownika Pobierz pdf (Strona 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.

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