Lucent Technologies MERLIN LEGEND Release 6.1 System Planning Manual page 550

MERLIN LEGENDCommunications System Release 6.1
System Planning 555-661-112
Glossary
CCITT
CCS
centralized
telephone
programming
Centralized Voice
Messaging
central office
Centrex
channel
channel service
unit
checksum
circuit-switched
data call
class of restriction
clear data channel
(International Telegraph and Telephone Consultative
Committee)
(common-channel signaling) Signaling in which one
channel of a group of channels carries signaling
information for each of the remaining channels, permitting
each of the remaining channels to be used to nearly full
capacity. In the system's 100D module, channel 24 can be
designated as the signaling channel for channels 1–23.
Programming of features on individual telephones;
performed at a central location by the system manager.
See also system programming and extension
programming.
The sharing of a voice messaging system by two or more
directly connected MERLIN LEGEND systems in a private
network. Available beginning in Release 6.1.
See CO .
Set of system features to which a user can subscribe on
telephone trunks from the local telephone company.
Telecommunications transmission path for voice and/or
data.
See CSU .
Sum of ones in a sequence of ones and zeros used to
detect or correct errors in data transmission.
Data call made through an exclusively established and
maintained connection between data stations .
See COR .
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.
Issue 1
August 1998
Page GL-6