Lucent Technologies DDM-2000 OC-3, Руководство по установке

Страница: 460 / 492

GL-4 Issue 9 October 1998
363-206-204
GLOSSARY
BITS
Building Integrated Timing Supply — A single clock that provides all the DS1 and
DS0 synchronization references required by clocks in a building.
BRI
Basic Rate Interface.
Broadband
Any communications channel with greater bandwidth than a voice channel; some-
times used synonymously with wideband. However, wideband FM is not the same
as broadband.
C
CC
Clear Channel — A provisionable mode for the DS3 output that causes parity vio-
lations not to be monitored or corrected before the DS3 signal is encoded.
CEV
Controlled Environment Vault
CIT
Craft Interface Terminal. The connector on the front of a shelf which is used to
gain access to the condition of the shelf and system and through which system
parameters and values can be changed
CCITT
International Telephone and Telegraph Consultative Committee — An interna-
tional advisory committee under United Nations’ sponsorship that has composed
and recommended for adoption worldwide standards for international communica-
tions. This function is now under the auspices of the ITU (International Telecom-
munications Union). See ITU.
CLF
Carrier Line Failure Status.
CLK
Clock.
CMOS
Complementary Metal Oxide Semiconductor.
CO
Central Office.
COACH
A system of on-line support tools aimed at providing product news and bulletins,
diagnostic services, compatibility information, and on-line documents.