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Cable, Network Acronyms, Glossary and Terms

A   B   C   D   E   F   H   I   M   N   O   P   R   S   T

C

Cable: A set of insulated wires or conductors within an extruded jacket. Many types of cable utilise shielding around the wires and under the cable jacket.

Cable Assembly: A cable that has been terminated with one or more connectors.

CCS6: SCCS system 6, first out of band signalling system in North America (CCIS)

CD: Carrier Detect, digital output from modem when it receives analogue signal

CD: Count Down, a counter that holds the number of cells queued ahead of the local message segment (802.6)

CDMA: Code Division Multiple Access, spread spectrum; broadcast frequency changes rapidly in pattern know to receiver

CELP: Code-Excited Linear Predictive coding, a voice compression algorithm used at 8 kbit/s

Centre Conductor: The solid or stranded wire in the middle of the coaxial cable. The conductor diameter is measured by the American Wire Gauge, AWG.

CEPT: Conference on European Posts & Telecommunications, a body that sets policy for services and interfaces in 26 countries.

CFA: Carrier Failure Alarm, detection of red, local or yellow, remote alarm on a T1 link.

CGA:

• Carrier Group Alarm, trunk conditioning applied during CFA.
• Colour Graphics Adapter

CIT: Computer integrated telephony

CL:

• Common Language, Bellcore codes used to identify equipment locations, etc.
• Connection Less.

Client Server: A network architecture where multiple user workstations (Clients) communicate with backend servers through a network. Clients are fully operating systems that are capable of processing data.

CLLM: Consolidated Link Layer Management (820)

CLN: Connectionless network, packet address is unique and network routes all traffic

CLNP: Connectionless mode Network (layer) Protocol (SONET).

CLTS: Connectionless Transport Service, OSI datagram protocol

CMA: Communications Managers Association

CMDR: Command Reject similar to FRMR (HDLC)

CMI: Coded Mark Inversion, line signal for STS-3

CMIP:

• Constant Mark, Inverted; line coding for T-1 local loop in Japan
• Common (network) Management Information Protocol, part of the OSI network management scheme, connection oriented

CMIS: Common (network) Management Information Service, runs on CMIP (OSI)

CMISE: CMIS Element

CMOS: Complementary Metal Oxide Semiconductor, low power method (lower than NMOS) to make ICs.

CMOT: CMIP over TCP/IP

CMT: Connection Management, part of SMT that establishes physical link between adjacent stations (FDDI)

CO: Central Office, of a phone company, where the switch is located; the other end of the local loop opposite CP.

Coaxial Adapter: A device used to change one connector type to another or one gender to another (ex. BNC to SMA Adapter).

Coaxial Cable: A two conductor cylindrical transmission line typically comprised of a centre conductor, an insulating dielectric material and an outer conductor (shielding). Coaxial cable can be flexible (typical to the assemblies found in this catalogue), semi-rigid or rigid in nature.

Coaxial Connector: The interconnection device found at each end of a coaxial cable assembly. There are many common types of coaxial connectors such as: BNC, SMA, SMB, F, etc.

COC: Central Office Connection, separately tariff part of T-1 circuit within a CO

COCF: Connection Oriented Convergence Function, MAC layer entity

CODEC: An acronym for COder/DECoder. A device used for converting analogue signals to digital signals.

COFA: Change of frame Alignment, movement of SPE within STS frame

CO-LAN: Central Office Local Area Network, a data switching service based on a PBX in a carriers CO.

Component Connectors:
	The best analogue connection for video. It sends the signal in three separate components and is found on high-end equipment like DVD players. Physically, the connectors can be phono or BNC types.

Conductor: A metal path (usually copper) that passes electricity. When discussing data cabling, "wire" and "conductor" are synonymous.

Connector: An electromechanical coupling device that provides an electrical interface that can be mated and unmated.

Contact: The specific points of contact within a connector. Contacts can be male (pins) or female (sockets.).

Contact Resistance: First, resistance is basically the opposition to electron flow in an electrical circuit and connector manufacturers strive to attain the lowest amount of resistance possible for each contact. Contact resistance is the cumulative resistance value for mated contacts.

Converter: A device used to convert from one transmission media to another (Ex. Fibre/Copper Media Converter). Converters are usually externally powered as they physically "repeat" or regenerate the signal.

CONP: Connection Mode Network layer Protocol

COS: Class of Service

COT: Central Office terminal, equipment at CO end of digital loop or line.

CP: Central Processor, CPU

CP: Customer Premises, as opposed to CO.

CPE: Customer Premises Equipment, hardware in users office.

CPI: Computer-PBX interface, a data interface between NT1 and DEC.

CPN: Customers premises Node, CPE.

CPU: Central Processor Unit, the computer

CR: Carriage Return, often combined with a line feed when sending to a printer etc.

CRC: Cyclic Redundancy Check, an error detection scheme used with ARQ.

Crimping: A means of securing an electrical contact to a wire using tools that compress the metal contact around the wire.

Crosstalk: When unwanted electromagnetic fields from conductors are transferred into adjacent conductors. Crosstalk is controlled by twisting conductors into a pair or separating/shielding conductors.

CRV: Coding Rule Violation, unique bit signal for F bit in frame 1 of CMI.

CS: Convergence Sublayer, where header and trailer are added before segmentation.#

CSC: Circuit Switched Channel, connection.

CSMA: Carrier Sense Multiple Access

CSPDN: Circuit Switched Public Data Network.

CS-PDU: Convergence layer PDU, info plus new header and trailer to make packet that is generated into cells or SUs.

CSU: Channel Service Unit, the interface to the T-1 line that terminates the local loop.

CTS: Clear To Send, lead on interface indicating DCE is ready to receive data.

CV: Coding Violation, transmission error in SONET section.

CVSD: Continuously Variable Slope Delta modulation, a voice encoding technique offering variable compression.