Lucent Technologies MERLIN LEGEND Release 7.0, Руководство по системному программированию, Страница: 1041 / 1082

MERLIN LEGEND Communications System Release 7.0
System Programming
555-670-111
Issue 1
April 1999
Glossary
GL-7
Clear Data
Channel Clear data channels (also called unrestricted data
channels) allow the transmission of occurrences of more
than seven contiguous zero bits. If a clear data channel is
requested and only restricted channels are available, the
call will be rejected. See also
Restricted Data Channel .
Clock
Synchronization When digital signals are transmitted over a
communications link, the receiving end must be
synchronized with the transmitting end to receive the digital
signals without errors using clock synchronization. A
system synchronizes itself by extracting a timing signal
from an incoming digital stream. All the digital facilities in a
network operate from a single common clock—preferably a
port connected to a digital
PSTN
facility on a
hub system
or
a system that connects two network systems. In this case,
all digital facilities specify a loop clock source. One system
in a network may be specified as a local clock source when
no functioning digital facility in the network is connected to
the
PSTN . All other digital facilities then use this clock and
specify their clock sources as loop. Primary, secondary,
and tertiary clock sources are specified to allow backup
synchronization in the event that the primary source is out
of service.
CMS Call Management System . DOS-based application that
simulates the actions of a system operator by answering
and distributing calls. Also produces reports for call
analysis.
CO Central Office . Location of telephone switching equipment
that provides local telephone service and access to toll
facilities for long-distance calling.
Coaxial Cable Cable consisting of one conductor, usually a small copper
tube or wire within, and insulated from, another conductor
of larger diameter—usually copper tubing or copper braid.
Codec
Coder-Decoder
. Device used to convert analog signals—
such as speech, music, or television—to digital form for
transmission over a digital medium and back to the original
analog form.
Collected Digits Digits that a caller dials in response to an integrated voice
response application’s menus (also called
prompted digits
);
collected digits may be used to initiate a screen pop at a
system extension. See also
CTI Link
.
Combination
Configuration Private network arrangement that combines characteristics
of Virtual Private Network ( VPN ), a series configuration,
and a
star configuration
.
Common Channel
Signaling See
CCS
.