Verilink AS2000: The Basics (880-502981-001) Product Manual Manual de usuario descargar pdf (Pagina 128)

Acronyms and Definitions

Glossary-8 Verilink Access System 2000: Basics

cable An assembly of one or more

conductors within a protective

sheath, made so as to permit the

use of the conductors separately

or in groups.

carrier failure alarm (CFA) A major alarm indicating that the

signal received at a network port

has degraded to the point of non-

use.

carrier registers Memory storage where the

previous 24 hours’ performance

monitoring data is accumulated.

The carrier registers can be read

by both the carrier (telco) and the

end user.

C-bit There are three C-bits per

subframe. The DS3 C-bit parity

format, unlike the DS3 M13

format, does not use the DS3-level

C-bits for bit stuffing control.

Instead, the C-bits are used to

provide (a) in-service, end-to-end

path performance monitoring of

the DS3 signal, and (b) in-band

data links.

C-bit parity Derived from M13 framing format,

the C-bit parity format uses the C-

bits differently than the M13

format to provide in-service, end-

to-end path monitoring of the DS3

signal and in-band data links. The

ability to monitor degraded

seconds, bi-directional end-to-end

parity, and far-end alarms gives

the C-bit parity format additional

maintenance functionality over the

M13.

CCS See

common channel signaling

(CCS)

CCITT International Telegraph and

Telephone Consultative

Committee. Now known as the

Telecommunication

Standardization Sector of the ITU

(ITU-T).

CCV C-bit Coding Violation. A DS3 is a

CP-bit parity error event during the

performance threshold interval.

CEPT Committee of European Postal and

Telecommunications.

CEPT-1 Committee of European Postal and

Telecommunications digital level

1, also called E1(2.048 Mbit/s).

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