System information

Glossary
Issue 1 October 1997 GL- 7
cartridge tape drive
A high-capacity data storage/retrieval device that can be used to transfer large amounts of infor-
mation onto high-density magnetic cartridge tape based on a predetermined format. This tape is
to be removed from the system and stored as a backup.
CAS
See call accounting system (CAS).
CCA
See call classification analysis (CCA)
.
CDH
See call data handler process (CDH).
CDR
See call detail recording (CDR).
CDRU
See call detail recording utility (CDRU)
CED tone
See called tone (CED tone).
CELP
See code excited linear prediction (CELP).
central office (CO)
An office or location in which large telecommunication equipment such as telephone switches
and network access facilities are maintained. In a CO, private customer lines are terminated and
connected to the public network through common carriers.
central processing unit (CPU)
The component of the computer that manipulates data and processes instructions coming from
software.
channel
A telecommunications transmission path for voice and/or data.
channel capacity
A measure of the maximum bit rate through a channel.
class of restriction (COR)
A feature that allows up to 64 classes of call-origination and call-termination restrictions for tele-
phones, telephone groups, data modules, and trunk groups. See also class of service (COS).
class of service (COS)
The standard set of I
NTUITY AUDIX features given to users when they are first administered (set up
with a voice mailbox). See also class of restriction (COR).
clear to send (CTS)
Located on Pin 5 of the 25-conductor RS-232 interface, CTS is used in the transfer of data
between the computer and a serial device.
client
A computer that sends, receives and uses data, but that also shares a larger resource whose
function is to do most data storage and processing. For Lucent I
NTUITY Message Manager, the
user’s PC running Message Manager is the client. See also server.
CMS
See call management system (CMS).