CAP (Carrierless Amplitude and Phase (modulation) --
A two dimensional line modulation code
used in higher speed modems. While CAP is used in
SDSL,
there are two accepted modulation protocols in
ADSL;
CAP and
DMT.
CCITT (Comité Consultatif
International Téléphonique et Télégraphique)
United Nations advisory committee for international communications
systems to which many modem standard are referred. CCITT has been
reorganized and newly designated as
ITU-T.
Channelized
Refers to data that is formatted (characters attached to the content
data) for correct destination routing of the data.
Channel Bank-
A multiplexer that combines 24 voice grade
analog and/or data circuits into a single
T1
(DS-1)
format. See D2
and D4 Channel Banks
Clear Channel
- Refers to the available bandwidth of a channel after any control or
signaling information is accounted for. A 64K Clear Channel has the
entire 64Kbps available for users.
CLEI (Common Language
Equipment Identifier) -- Products that
are purchased by most TELCOs requires a CLEI number on the equipment
they install. The CLEI is assigned by Bellcore when the equipment is
registered by Bellcore. See
PID
Client --
May be a hardware or software device. Hardware: a
device such as a terminal, which is used to contact a
server,
router
or like device. Software: a program that is used to contact and obtain
data from a Server software program on another computer - A Web Browser
is a specific kind of Client.
Co-Locate --
The Telecommunications ACT of 1996 requires
telephone companies to lease up to 20% of their facilities to other
competitive access providers. Pursuant to this requirement, the
telephone companies allocated space within their facilities that house
the wires and other resources as defined in the ACT. This space is
designated as the Co-Locate area where these competitors are allowed
physical access to their leased resources.
COT (Central Office Terminal
(Termination)) -- An acronym indicating
the equipment installed on the Central Office site (normally, but not
necessarily, the Telco side) See:
CPE,
ATU-C,
ATU-R
CPE (Customer Premises
Equipment) -- An acronym indicating the
equipment installed on the customers, or clients site or physical
location. See:
COT,
ATU-C,
ATU-R
Cross-Connect --
Device that can connect one of a set of signals on one the side of that
device to another set of signal to the other side of that device. A
telephone company's switching office is a type of Cross-Connect switch,
because it connects one <of many> telephones on one side of the central
office, to one <of many> telephones on the other side of the central
office. Cross-Connect devices can be hardware type that switch hard
circuits, or can be 'soft' cross-connects that connect data packets of
information from one circuit to another.
CSA (Carrier Service Area) -
Normally refers to the service area capabilities of a CO (Central Office)
which refers to the physical area that circumferences a CO location-
typically a radius about 1-2 miles. (CSA
is also known as an acronym for "Canadian Standards Association") -kinda
like UL in the USA - no relationship.
CSU/DSU-See
DSU/CSU |