Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 128)

Acronyms and Definitions
Glossary-8 Verilink Access System 2000: Basics
C
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).