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C
C - C Programming Language
C - confidential
C-FAST - counter-force automated surveillance & targeting (USAF)
C-SIGINT - counter-signals intelligence
C-LAN - Communications-LAN
C-E - communications-electronics
C - clear
C-Bit - Parity Format - This arrangement of the control bits in the basic M-frame is to enhance the current asynchronous DS3 datastream functionality. The 21 C-bits are defined to provide improved network maintenance and monitoring, or DS3 path monitoring and implementation of FEBE as well as providing for data link applications. Contrast with M13 format used for DS1 to DS3 multiplexing.
C-E - communications-electronics
C-EMS - Communications-Electronic Management System
C&A - certification & accreditation
C&D - cover and deception
c/kT - ratio of average carrier power to noise power spectral density
C/Ku - commercial satellite communications frequency bands
C/S/A - CINC, Service, or agency
C2 - command and control
C2 - configuration 2
C2 - uplink network control
C2BFMAA - command and control battlefield function mission area analysis
C2CAMP - command and control concept and management plan
C2CM - C2 countermeasures
C2DA - command and control decision aid
C2E - command and control element
C2IPS - command and control conformation processing system
C2MAA - command and control mission area analysis
C2MADP - command and control mission area development plan
C2MAMP - command and control mission area materiel plan
C2MUG - command and control microcomputer users group
C2P - command and control protect
C2T2 - Commercial Communications Technology Test Bed
C2V - command and control vehicle
C2W - command and control warfare
C2WC - Command and Control Warfare Commander (Navy)
C3 - command, control and consultation (NATO)
C3 - command, control, and communications
C3 - downlink network control
C3CM - C3 countermeasures (now C2CM or C2W)
C3EVAL - command, control, and communications evaluation model
C3I - command, control, communications and intelligence
C3I - command, control, communications and information (UK)
C3I - Command, Control, Computers, and Intelligence
C3S - command, control, communications system
C4 - command, control, communications, and computers
C4I - Command, Control, Communications, Computer and Intelligence
C4I2 - command, control, communications, computing, intelligence and information systems
C4IFTW - Command, Control, Communications, Computers, and Intelligence for the Warrior
C4ISR - C4 Intelligence, Surveillance and Reconnaissance
C4ISR - command, control, communications, computers,intelligence, surveillance, and reconnaissance
C6 - Combined Command, Control, Communications, and Computer Systems Directorate
CA - Certification (certificate) Authority
CA - III Challenge Athena Phase III
CAAM - computer assisted artillery meteorology
CAAP - Critical Asset Protection Program
CAB - combat air base
Cabinet - An equipment enclosure, usually with front and rear doors. Standard EIA equipment cabinet that houses card shelves, power supplies, alarm panel, fans, power distribution units, T1 jackfields.
CAC - connection admission control
CAC - Common Access Cards
CAC2 - combined arms command and control (Army)
CACSD - computer-aided control system design
CAD - computer-aided design
CAD - collective address designators
CADCI - common air defense communications interface CAP control and alarm panel
CADD - computer aided design and drafting
CADS - computer anomaly detection system
CAE - common applications environment
CAE - computer-aided engineering
CAF - Combat Air Force
CAFED - computer-aided file of engineering drawings
CAFMS - computer assisted force management system
CAGE - commercial and government entity
CAI - computer-aided instruction
CAIRN - collaborative advanced internet research network
CAIS - common APSE interface set
CAL - computer-assisted learning
CALC - customer access line charges
Call - Manager - Controls busy/unbusy for voice calls.
Call - Priority - The priority assigned to each origination port to establish the order in which calls are reconnected, It also defines which calls can or cannot be placed when bandwidth has been reserved.
Call - Setup - The process of dynamically allocating bandwidth and establishing logical circuits that permit a voice or data call connection.
Call - Summary - Contains a summary of calls in progress on a node, link, or card.
Call - The logical port-to-port connection or circuit (also referred to as a channel) built between two ports by the network, including the origination node, pass-through nodes, and the destination node.
Called - Party Address - This is the destination phone number of a call delivered to a switch. For instance this could be the CLID of a call delivered to a PBX using DID or two-way trunks. See also DID.
CALM - computer aided load manifest (manifesting) system
CALS - computer-aided acquisition and logistics support (old)
CALS - continuous acquisition and life cycle support (new)
CAM - communication access method
CAM - computer-aided manufacturing
CAM - content-addressable memory
CAM - configurable access module
CAMA - centralized automatic message accounting
CAMEO - Computer-Aided Management of Emergency Operations (EPA)
CAMIS - Customs accounting and management information system (Customs)
CAMP - command ADP modernization program
CAMP - common Ada missile package
CAMP - computer-assisted message preparation
CAMPS - computer-aided mission planning system
CAMPS - compartmented All Source Analysis System messageprocessing system
CAN - customer access network
CAN - campus area network
CAOC - Combined Air Operations Center (NATO)
CAOW - cable orderwire
CAP - carrierless amplitude phase (modulation)
CAP - Channel Access Protocol
CAP - competitive access provider
CAP - communications-electronics accommodation program
CAP - Connection Approval Program
CAP - Control and Alarm Panel
Capacity - The amount of communications traffic a circuit, multiplexer, or network system can support. Capacity is determined by the available bandwidth and the ability to maximize bandwidth use.
CAPE - computer-aided parametric estimating
CAPI - cryptographic application programming interfaces
CAPS - communications/aural protective system
CAPS - corporate accounts processing system (IRS)
CAR - committed access rate
Card - A printed circuit board assembly that is located in a card slot on a shelf (also referred to as a module). Typically a module has a front and rear interface card. The front card contains the logic associated with the card. The card is identified by a card ID.
Card - ID - Cards are identified through the Operator Interface by a number from 0 to 127 preceded by the letter "C" and an optional node ID (for example, N2C26). The card number refers to the actual card slot in which a card resides (or will reside) in the card shelf.
Card - Parameters - See parameters.
Card - Shelf - Card shelf is a chassis that contains front and rear cards and a backplane. The cards on the shelf are connected by buses. The Promina 800 HSS-2 shelf has 16 card slots, the STS shelf has 12 card slots, and the EXS shelf has 16 card slots; the Promina 400 has 12 card slots and the expansion unit has 12 card slots; and the Promina 200 has 8 card slots.
Card - Slots - Guide rails, at the top and bottom of the card shelf interior, provide slots for inserting cards into the shelf.
CARDS - central archive for reusable defense software
CARP - contingency alternate route plan
Carrier - Detect Circuitry - Circuits that detect a carrier signal to determine if a transmission is about to occur.
Carrier - Signal - A continuous sine-wave signal at a frequency that easily passes over the communications medium. It is a pipeline that allows data to move from DCE to DCE, with the carrier modulated in order to send data.
CARS - cable television relay service (station)
CARS - contingency airborne reconnaissance system (USAF)
CART - compact array radio-location technique
CART - computer analysis and response team (FBI)
CARTS - common Ada run-time system
CAS - command automation system
CAS - crew assignment sheet
CAS - Task (Channel Associated Signaling) Task - The CAS task implements all signaling protocols and conversions for PRC and TMCP modules. The CAS task provides support for signaling protocol SSDC5-A and E&M, as described in British Telecom Publication BTNR 187.
CASE - computer-aided (assisted) systems (software) engineering
CASES - capability assessment expert system
CASL - CSCE automated software load
CASS - consolidated automated support system
CAST - computer-aided software testing
CAT - computer-assisted training or technology
CATC - carrier air traffic control center
CATF - Commander Amphibious Task Force
CATIA - computer graphic aided three-dimensional application
CATIS - computer-aided tactical information system
CATS - consolidated asset tracking system (Justice)
CAU - controlled access unit
CAU - crypto authorization (ancillary) unit
CAVE - Cellular Authentication of Voice Encryption
CAW - certification authority workstation
CAWG - Communications Architecture Working Group
CB - common battery
CBAC - Context Based Access Protocol
CBC - cipher block chaining
CBCS - Combat Communications Squadron
CBCS - common baseline circuit switch
CBCS - common battery circuit switching
CBEMA - Computer and Business Equipment Manufacturers Association
CBFS - cesium beam frequency standard
CBI - computer based instruction
CBLTU - common battery line termination unit
CBMS - computer-based mail system
CBR - case based reasoning
CBR - continuous (constant) bit rate
CBS - corps battle simulation
CBT - computer based training
CBT - crossbar transceiver
cbt - combat
CBU - Conference Bridge Unit
CBus - (Control Bus) - The CBus carries signaling and control information between modules.
CBX - computer branch exchange
CC - communications central
CC - common criteria
CC - Combatant Commander
CC/S/A - Combatant Commander/Service/Agency
CCA - Circuit Card Assembly
CCB - (Call Control Block) - The basic data structure that is used by the call controller to identify and describe data circuits. A Call In Progress (CIP) block forms an extension to the CCB during circuit construction. This is discarded upon circuit establishment.
CCC - CINC Command Complex
CCC - command and control center
CCC - critical control circuit
CCD - charged-coupled device
CCDEL - Command and Control Demonstration Laboratory
CCDG - Commander, Cruiser Destroyer Group
CCDL - cross channel data link
CCE - configurable crypto engine
CCEP - commercial communications security endorsement program
CCES - contingency communications extension switch
CCF - control communications facility
CCI - computer crime Iinitiative
CCI - Computer Crime Investigator
CCI - controlled cryptographic item
CCI - controlled COMSEC item
CCIR - commanderÕs critical information requirements
CCIR - consultative committee of international radio
CCIS - command center information system
CCIS - command, control and information system
CCIS - 1. Common Channel Interoffice Signaling. A signaling system where network information such as address and routing information are handled externally to the actual communications (voice) path. SS7 (Signaling System 7) is the internationally standardized CCIS system. Deployment of CCIS increased efficiency since no communications (voice) channels are used merely to report an "all trunks busy" or "far end busy" conditions. It also decreased toll fraud substantially since it removed the potential for access to the signaling information that was inherent to in-band signaling schemes. CCIS also enables CLASS features as well as sophisticated re-routing features for "intelligent network" applications. See also In Band Signaling. 2. common channel interswitch signaling
CCITT - (Consultative Committee for International Telegraph and Telephone) - This international organization recommends standards for telecommunications. Also see ITU.
CCIU - CEF control interface unit
CCL - connection control language
CCL - continuous communications link
CCL - communications-computer link
CCN - common control node
CCOR - corps COMSEC office of record
CCOW - control channel order wire
CCP - Caneware control processor
CCP - contingency communications package
CCPC - Civil Communications Planning Committee (NATO)
CCPDS - command center processing and display system
CCPL - command and control product line (USAF)
CCPS - contingency communications parent switch
CCR - call completion rate
CCS - combat control system
CCS - command & control systems
CCS - constellation control stations
CCS - (Common Channel Signaling) - 1. A channel used to carry signaling information via LAPD (link access procedure/D channel). 2. communications control set
CCSA - common control switching arrangement
CCSC - Commercial Computer Security Centre (UK)
CCSD - control communications service designator
CCSIL - command and control simulation interface language
CCSK - cyclic (cycle) code shift keying
CCSQ - combat communications squadron
CCSS - commodity command standard system
CCTC - Command and Control Technical Center
CCTT - Close Combat Tactical Trainer
CCTT - command and control team trainer
CCTV - closed circuit television
CCU - common control unit
CCU - combined controller unit
CCW - cable cutoff wavelength
CD - carrier detect
CD - collision detection
CD - color display
CD - compact disk
CD-I - compact disk-interactive
CD-MO - compact disk-magneto optical
CD-R - compact disk-recordable
CD-RDx - dompact disk - read only memory data exchange standard
CD-ROM - compact disk - read only memory
CD-RTOS - compact disk - real time operating system
CD-V - compact disk - video
CD-WO - compact disk - write once
CD-XA - compact disk - extended architecture
CD-R - compact disk recordable
CD - channel designator
CD - compact disk
CD - compressed dial
CDA - compound document architecture
CDA - computer design activity
CDA - conditioned diphase adapter
CDC - Conditioned Diphase Converter
CDC - central directory component
CDD - common data dictionary
CDDI - copper distributed data interface
CDE - common data environment
CDE - common desktop environment
CDF - combined distribution frame
CDGS - conditioned diphase group signal
CDI - Conditioned Diphase
CDIF - CASE data interchange facility
CDIG - commercial digital
CDIS - counter drug intelligence system
CDL - computer design language
CDL - compressed dialing list
CDM - cable driver modem
CDM - conditioned diphase modulation
CDMA - code division multiple access
CDMGB - Cable Driver Modem Group Buffer
CDMS - computer-aided design data management system
CDN - consolidated data network (Treasury) (Now TCS)
CDN - compressed dial number
CDOS - concurrent disk operating system
CDP - 1. conditioned diphase; 2. Cisco Discovery Protocol
CDPD - cellular digital packet data
CDPSK - coherent differential phase-shift keying
CDR - call detail recording
cdr - commander
CDS - Compact Digital Switch
CDS - call directory service
CDS - combat direction system
CDS - command destruct system
CDS - communications deception unit
CDS - compact disk switches
CDSF - Combat Developer Software Facility
CDSS - commanders decision support system
CDT - computer directed training
CDU - Control Display Unit
CDV - compressed digital video
CE - cache enable
CE - communications element
CE - communications-electronics
CEC - computer engineering center
CEC - cooperative engagement capability (Navy)
CEC - Central Equipment Cabinet
CECOM - Communications and Electronics Command (Army)
CEF - common equipment facility
CEF - COMSEC equipment facility
CEG - communications equipment group
CEG - Common Equipment Group
CEI - communications/electronics intelligence
CEI - comparatively efficient interconnection
CEI - conducted electromagnetic interference
CEIS - corporate executive information systems
CEIT - Center of Excellence for Information Technology
CellXpress - Module - This module is an ATM access device supporting T1, E1, T3, and E3 trunk interfaces. It multiplexes different sources of Promina traffic (voice, video, and data) for transport across an ATM network.
CELP - code-excited linear prediction
CEM - Control Electronics Module
CEMT - Center for Electronic Messaging Technologies (GSA)
cen - center
CENT - US Central Command
CENTAF - Air Force Component Central Command
CENTCOM - US Central Command
Central - Office - See CO.
CEOI - communications-electronics operating instruction
CEP - civil emergency planning
CEP - cable entrance panel
CEPT - (Committee of European Postal and Telecommunications) Module - This module is an internodal trunk operating at 2048 kbps (European data rates). It supports HDB3 line coding, which meets the ones density without data corruption. This module cannot be used for port connection to a channel bank.
CERIAS - Center for Education and Research in Information Assurance and Security
CERT - Computer Emergency Response Team
CES - circuit emulation standard
CESA - Cyberspace Electronic Security Act
CESE - communications equipment support element
CESG - Communications Electronics Security Group (UK)
CESG - communications equipment support group
CESO - Communications-Electronics Staff Officer
CEWI - combat electronic warfare intelligence
CEWS - communications early warning system
CF - central facility
CFAA - Computer Fraud and Abuse Act
CFD - configure fill device
CFE - Caneware front end
CFPD - color flat panel display
CFRP - conceptual rramework for reuse planners
CG - communications group
CGA - color graphics adapter
CGI - common gateway interface
CGI - computer generated interface
CGM - computer graphics metafile
CGRP - common hardware reference platform
CGS - common ground station
CGSC - Command and General Staff College
CGTS - Coast Guard telecommunications system
CGWS - Coast Guard work station
CH - channel
CHAALS - communications high accuracy airborne location system
chan - channel
Channel - An electronic communications path, usually of 4,000 Hz (voice) bandwidth; physical or logical path allowing the transmission of information. Generally, channel refers to an individual DS0B Circuit with a DS0B bundle. Also see port.
Channel - Bank - Equipment used to connect to digital transmission facilities. In the transmit direction, the channel bank performs sampling, time-division multiplexing, compression, and encoding in binary format. In the receive direction, the channel bank performs decoding, expanding, and gating. The channel bank must also detect and transmit signaling information for each channel, transmit framing information to the receiving terminal so that the time slots allocated to each channel can be identified, and transmit alarm signals to the far terminal during a specified alarm condition.
Channel - Capacity - The maximum information transmission rate possible through a channel at a specified BER.
Channel - Time Slot - In time-division multiplexing, a time slot starting at a particular phase in each primary frame and allocated to a channel for transmitting pulse-coded voice or data signal. A standard PCM system has 24 channel time slots.
CHAP - Challenge Handshake Authentication Protocol
CHAR - character
CHBDL - common high bandwidth data link
CHCS - composite health care system
Checksum - The sum of a group of data items, associated with the group, for checking purposes.
CHEMO - chemical officer
CHIMPS - Chirpsounder Integrated MUF Prediction System
CHIPs - correlation of hot IPs
CHISSA - center for high integrity system software assurance
CHK - check
CHNG - change
CHNL - channel
Choke - Exchange - A telephone exchange which is assigned to Radio and TV stations, Promoters, and other users which will be receiving large numbers of simultaneous calls. The idea is to group all of these users on a single exchange so when all routes into that exchange are in use "normal" users (on other exchanges) will not experience blocking of incoming or outgoing calls. Trunks from other local exchanges into the choke exchange are deliberately limited to just a few paths so callers will get an "all trunks busy" instead of completely blocking their local exchange. However, when one of the choke exchange users experiences a large number of calls (as when your station runs a contest) the other choke exchange users will be blocked because all trunks into the choke exchange will be busy. See Blocking and Concentration
CHPC - center for high-performance computing
CHS - common hardware and software
CHUB - controlling HUB
CI - counterintelligence
CI - competitive intelligence
CI-library - cryptographic interface library
CI - (Customer Installation) - Equipment and wiring at the customer's location on the customer side of the Network Interface (NI).
CI/SCM - counterintelligence and security countermeasures
CIAC - Computer Incident Advisory Council (capability)
CIAO - Critical Infrastructure Assurance Office
CIAP - combat intelligence architecture plan
CIB - communications information bulletins
CIC - carrier identification codes
CIC - combat information center
CIC - Committee on Information and Communications
CIC - communication interface controller
CIDF - Common Intrusion Detection Framework
CIDOS - COMSEC Interservice Depot & Overhaul Standard
CIDR - classless interdomain routing
CIDSE - consolidated integrated development support environment
CIDSS - CINCPACAF integrated decision support system
CIFAX - ciphered facsimile
CIFS - common Internet file system
CIG - communications interface group
CIGSS - common imagery ground/surface system
CIHEP - Counterintelligence and Human Intelligence Equipment Program
CIK - crypto ignition key
CILS - Commerce Information Locator Service
CILS - continuous integrated logistics system
CIM - Center for Information Management
CIM - computer integrated manufacturing
CIM - corporate information management
CIM - Crypto Interface Module
CINC - Commander-in-Chief
CINC - commander in chief of a combatant command
CINCPAC - FLT - Commander-in-Chief, Pacific Fleet
CINEMA - commerce, internet, electronic mail access (GSA/FTS)
CIO - Central Imagery Office (now part of NIMA)
CIO - Chief Information Officer
CIOCS - communication input/output control system
CIOSP - Chief Information Officer Solutions and Partners (NIH)
CIP - consolidated imagery program
CIP - communications improvement program
CIP - communications implementation plan
CIP - combat information processor
CIP - Critical Infrastructure Protection
CIP - critical intelligence parameters
CIP - communications interface processor
CIPO - CINC Interoperability Program Office
CIPSO - commercial Internet protocol security option
CIPSU - CIP pseudoline
CIPWG - Critical Infrastructure Protection Working Group
CIR - committed information rate
CIR - Central Intelligence Report
CIRC - central information reference and control system
Circuit - A communications path between two points.
Circuit - Switched Data - See CSD.
Circuit - Switching - A system where a dedicated channel is allocated to the users of that call for the duration of that call. That channel is allocated for the duration of the call regardless if information is being transmitted at any given moment. Bandwidth through the channel is fixed, at no time may this bandwidth be exceeded. If this bandwidth is not used it is wasted. While inherently inefficient, the dependable and reliable nature of circuit switching makes it ideally suited to real-time voice and audio/video conferencing applications. This is in stark contrast to systems where statistical multiplexing is used. See Statistical Multiplexing
CIREN - Crash Injury Research and Engineering Network (NHTSA)
CIRG - Critical Incident Response Group (FBI)
CIRK - common interswitch rekey key
CIRK - common interswitch rekey
CIRT - computer incident response team
CIRV - common interswitch rekeying variable
CIS - combat intelligence system
CIS - communications and information systems (NATO)
CIS - CASE integration services
CIS - Combat Intelligence System
CIS - computer aided system engineering integration services
CISA - C4I Integration Support Activity
CISC - complex instruction set computer
CISL - common intrusion specification language
CISO - Chief Information Security Officer
CISO - counterintelligence staff officer
CISRV - common interswitch rekey variable
CISS - Center for Information Systems Security
CIT - combined interrogator/transponder
CIT - computer integrated telephony
CITA - Center on Information Technology Accommodation (GSA)
CITAC - Computer Investigations and Threat Assessment Center (FBI)
CITEL - Inter-American Telecommunications Commission
CITIS - Contractor Integrated Technical Information Services
CITS - combat information transport system (USAF)
CIU - communications interface unit
CIWE - Center for Information Warfare Excellence
CIX - Commercial Internet Exchange
CJA - Civil/Judge Advocate
CJCS - Chairman of the Joint Chiefs of Staff
CJCSI - Chairman of the Joint Chiefs of Staff Instruction
CJCSM - Chairman of the Joint Chiefs of Staff Manual
CJIS - criminal justice information services (systems) (FBI)
CJLI - command job language interpreter
CJTF - Commander, Joint Task Force
CK - check
CKA - chief knowledge architect
CKL - compromised key list
CKM - COMSEC key manager
CKT - circuit
ckv - common key variable
CLAR - channel local address register
CLASS - Custom Local Area Signaling Services. A variety of enhanced features (usually on analog lines) that take advantage of the ability of modern SS7 technology°Ã~s ability to transmit information about the calling party. CLASS includes such features as Caller ID, Automatic Callback, Call Trace (initiated by subscriber), Selective Call Rejection, etc.
Class - Of Service - Consists of, and determined by, four parameters assigned to each port: (1) call setup priority; (2) compression level; (3) preempt priority, and (4) routing requirement.
CLB - configurable logic block
CLCC - combined loop core card
CLCC - combined loop controller card
CLD - cable length demodulation
Clear - Channel - A 64 kbps channel (DS0) using out-of-band signaling, leaving the entire 64K for data. A clear channel uses no A/B bit signaling information, displayed when querying a port configured for clear-channel operation. Clear-channel operation is used by PRC and TMCP ports which use BEZS line coding. Also see BEZS.
Clear - Channel Bundle - A group of one or more DS0s installed on a TRK-3 span-mode card. Clear channel bundles provide connectivity between the Promina or IDNX node and off-net PX platform ports.
CLEC - Competitive Local Exchange Carrier. Your local telephone service provider who is one of the new-generation providers rather than a RBOC or Independent. A CLEC is really just an Independent, albeit one formed after the divestiture of AT&T. See LEC.
CLEF - commercially licensed evaluation facility
CLF - Commander Landing Force
CLI - call-level interface
CLI - calling line identification
CLID - Calling Line Identification. This is the ISDN and SS7 equivalent of Caller ID; I.E. the number of the calling party. See also ANI.
clk - clock
CLM - cable length demodulation
CLNP - Connectionless Network Protocol
CLNS - connectionless network service
Clock - An oscillator-generated signal that provides a timing reference for a transmission link; it controls timing of functions such as sampling interval, signaling rate, and duration of signal elements. Clocking is accomplished by phase locking to the appropriate reference derived from ports he or trunks.
Clock - Status - Contains information on where the clock information is obtained for the node.
CLR - clear
CLS - crosslink subsystem
CLSA - COMSEC logistics support activity
CLSU - communications security logistics support unit
CLTP - connectionless transport protocol
CLTS - connectionless transport service
CLU - command and launch unit
CLUI - command line user interface
Cluster - Controller - A device that interfaces multiple terminals with data communications facilities associated with central, major computer centers. Commonly used in multipoint synchronous data networks involving distributed transaction processing and host-controlled, centralized network architectures, such as SNA.
CLUT - color lookup tables
CM - configuration management
CM - countermeasures
CM - control modem
CM - communication modem
CM - crypto module
cm - centimeter
CM - control monitor
CMA - control monitor alarm
CMAA - communications mission area analysis
CMC - CDI Modem Card
CMC - computer-mediated communication [Internet]
CMCS - COMSEC material control system
CMD - command
CMDSA - COMSEC Materiel Direct Support Activity
CMI - computer managed instruction
CMI - (Coded Mark Inversion) - A CCITT line coding technique specified for the fourth-level CCITT multiplex signal. CMI is also used in other applications, notably in Japanese DS1 level systems. CMI is similar to digital biphase coding, in that an abundance of signal transitions exist, and there is no DC energy in the signal. Additionally there is no limit on the number of consecutive zeros allowed in the bit stream. CMI encodes ones (marks) as bipolar NRZ level/AMI; zeros are encoded as a half-cycle square wave of one particular phase. See waveform coding.
CMIO - communications security material issuing office
CMIP - common management information protocol
CMIS - common management information system (service)
CMIS/P - common management information services and protocols
CMISE - Corps Military Intelligence Support Element (Army)
CML - computer managed learning
CMM - capability maturity model
CMM - core memory module
CMMS - computerized maintenance management software
CMOS - cargo movement operations system (USAF)
CMOS - complementary metal oxide silicon
CMP - communications message processor
CMPR - common-mode rejection ratio
CMRS - commercial mobile radio services
CMS - Combat Mission Simulator
CMS - command management system
CMS - common mapping system (USAF)
CMS - combat mission simulator
CMS - configuration management system
CMSCD - Communication Mode Selector Control Device
CMST - collection management support tools
CMT - CarryMast Telescopic Mast
CMTC-IS - combat maneuver training center instrumentation system (Army)
CMTS - cable modem termination system
CMU - central management unit
CMW - compartmented mode workstation
CMWS - common missile warning system
CMX - circuit multiplexer
CMY - cyan-magenta-yellow (color model)
CN/CMS - counter-narcotics/command and management system
CNA - computer network attack (DOD)
CNC - computerized numerical control
CNCE - Communications Nodal Control Element
CNCS - crypto net control station
CND - Computer Network Defense
CND - computer network defense
CND-SP - computer network defense service provider
CNE - Computer Network Exploitation
CNI - Center for Networked Information
CNI - communication, navigation, identification
CNIDR - clearinghouse for network information and discovery and retrieval
CNIU - communications/navigation interface unit
CNM - customer network management
CNO - Chief of Naval Operations
CNO - computer network operations
CNOS - corporate network operating system
CNR - carrier-to-noise ratio
CNR - combat net radio
CNRI - combat net radio interface
CNS - channel networking service
CNS - communications, navigation and surveillance (FAA)
CNS - complementary network service
CNS - converged network services
CNSS - Core Nodal Switching Subsystem [Internet]
CNTG - Computer Network Transaction Groups
CNTL - control
CNV - VINSON cryptonet variable
CNX - certified network expert
CO - central office
CO - Commanding Officer
co - company
COA - central operating authority (NATO)
COA - course of action
COAM - customer owned and maintained equipment
COAST - computer operations, audit and security technology
COAX - coaxial cable
COBOL - common business oriented language
COBRA - common object request broker architecture
COCOM - Combatant Commander, combatant command
COCOMO - constructive cost model
CODEC - compression/decompression
Codec - COder/DECoder. A device which takes digitized audio and "codes" it in order to reduce the transmission bit rate and which can also simultaneously "decode" such coded audio. Strictly speaking, a codec does not include an ISDN terminal adaptor and relatedequipment.
COE - Common Operating Environment
COEA - cost and operational effectiveness analysis
COFDM - coded orthogonal frequency division multiplexing
COFF - common object file format
CofS - Chief of Staff
COI - community of interest
COIL - Chemical Oxygen-Iodine Laser
COINS - community online intelligence system
COM - character oriented messages
COMALF - commander, airlift forces comm communications
COMB - combiner
Combination - Trunk - A trunk (channel) which can both make and receive calls. This generally refers to analog ground start or loop start trunks, although the term can be applied to ISDN BRI or PRI channels as well. Each combination trunk normally has a telephone number, although they are frequently part of a hunt group and only one number may be published for that group. Also called a Both Way Trunk. This is not the same as a Two-way DID trunk. See DID Trunk, Hunt Group and Trunk
COMCAM - combat camera
COMINT - communications intelligence
COMM - communications
Common - Carrier - A company that furnishes communications services to the general public and is regulated by appropriate state or federal agencies.
Common - Channel Interoffice Signaling - See CCIS
Common - Equipment - Standard equipment that is shipped with nodes to provide basic functionality. It includes modules (such as the SX, BX, PPM and PSM for the Promina 800) as well as card shelves, power supply trays, and power supplies.
Companding - Derived from COMpressor and exPANDer, companding is the process of logarithmically compressing the dynamic range of an input signal at the transmitter and expanding it back to almost original form at the receiver.
COMPES - contingency operations/mobility planning and execution system
Competitive - Local Exchange Carrier - See CLEC
COMPFEC - compressed with forward error correction
Composite - Loopback - Loopback of the DS0B bundle.
Compression - Application of any of several techniques that reduce the number of bits needed to represent information in data transmission or storage. It conserves bandwidth and memory so the original form of the information can be reconstructed. Compression is also known as compaction.
Compression - Level - A level assigned to each voice port that defines the amount of compression needed on all calls originating from that channel. If a call cannot be set up to satisfy the assigned compression level or that satisfies the default standard of 64 kbps Pulse Code Modulation (PCM), no call is placed.
COMPUSEC - computer security
COMSAT - communications satellite
COMSEC - Communications Security
COMSIM - communications simulation system
COMSPOT - communications spot report
COMSTAT - communications status report
COMSTATSUM - communications status summary report
CONAUTH - controlling authority
Concatenation - The linking of transmission channels end to end.
Concentration - The basic premise is to share facilities wherever possible. For instance, while there may be thousands of customers served by a given Central Office, there will be substantially less than that number of calls which can be handled simultaneously. And even fewer long distance calls can be made simultaneously. The art of Traffic Engineering is to have enough capability that calls are rarely blocked, but not any more than that. See also Choke Exchange and Blocking.
Conditioning, - Line - The addition of equipment to a leased voice-grade channel to improve analog characteristics to allow higher rates of data transmission.
CONEXPLAN - contingency and exercise plan
Configuration - Database - The user-specified information about the network (such as nodes, cards, ports, and links) stored in flash memory, PSM disk drive, or both on Promina nodes.
Connect - Time - The time that a circuit is in use.
Connectivity - The ability to effectively integrate information and communications equipment, including equipment with different standards and protocols.
CONOPS - Concept of Operations
CONPLAN - 1. contingency plan; 2. operations plan in concept format
CONT - continuous
Contention - The facility provided by the dial network or a port selector that allows multiple terminals to compete on a first-come-first-serve basis for a smaller number of computer ports.
Control - Mode - A DDS circuit is in the Control Mode when the circuit's C bit = 0 (for example, the data bits contain a DDS Network Control Code such as a loopback request).
Controller - A generic term for a type of communication control unit that manages the details of line control and routing of data through a network.
CONUS - Continental United States
coord - coordinate(s)
COP - character oriented protocol
COP - common operating picture
COR - central office of record
CORBA - common object request broker architecture
CORN - computer resource nucleus (FAA)
COS - class of service
COS - corporation for open systems
COSCOM - corps support command
COSE - common open system environment
COSMIC - Computer Software Management and Information Center
COSPO - Community Open Source Program Office (CIA)
Cost - Routing - See routing cost.
COSTARS - combined sensors target acquisition, recognition, strike
COT - Commercial Over TRI-TAC
COT - computer operator terminal
COT - customer office terminal
COTS - commercial off-the-shelf
COU - cable orderwire unit
COW - control orderwire
CP - command post
CP - crypto peripheral
CP - collaborative planning
CPAS - Cellular Priority Access Service
CPCI - computer program configuration item
CPCS - (Common Part Conjunction Sublayer) - The Common Part Conjunction Sublayer of ATM Adaption Layer 5 in conjunction with the ATM-layer ATM_user_to_user Indication (end of PDU) provides segmentation and reassembly (frame delimiting) for FR-SSCS PDUs.
CPD - combat pictorial detachment (Army)
CPDLC - controller/pilot data link communications (FAA)
CPDS - computer program development specification
CPE - central processing element
CPE - (Customer Premises Equipment) - Equipment that is located on the customer's premises.
CPFSK - continuous-phase frequency shift keying
CPG - Central Processor Group
CPIN - computer program identification number
CPLD - complex programmable logic device
CPLI - calling party line identification
CPM - communications planning module
CPNI - Customer Proprietary Network Information
CPP - Communications Protocol Processor
CPP - point-to-point analysis
CPP - communication patch panel
CPPP - Compressed Point-to-Point Protocol
CPS - characters per second
CPS - certificate practices statement
CPS - COMSEC parent switch
CPSM - continuous phase shift modulation
CPSR - Computer Professionals for Social Responsibility
CPSS - Computer Systems Squadron
CPTS - computer program test specification
CPU - central processing unit
CPX - command post exercise
CR - channel (circuit) reliability
CRAG - compass, radar and global positioning
CRC - Control and Reporting Center
CRC - circuit routing chart
CRC - (Cyclical Redundancy Check) - 1. An error detection method, for link-level data transmissions, that does mathematical calculations on a message and sends the results to the receiving side. The receiving side performs the same calculation, and if the results do not match, it requests a retransmission. 2. circuit routing chart.
CRE - control and reporting element
CREN - Computer Research Education Network
CRF - Cable Retransmission Facility
CRF - channel reassignment function
CRI - collective RI
CRIS - communications resource information sharing (NCS)
CRIS - computer resources integrated support
CRISD - Computer Resources Integrated Support Document
CRISIS - combat readiness infrastructure support information system (USAF)
CRISP - Computer Resources Integrated Support Plan
CRISP - crypto reduced instruction set processor
CRITIC - critical intelligence
CRL - certificate revocation list
CRM - Collections Requirements Management
CRMP - Computer Resources Management Plan
CROM - control read only memory
Crosstalk - Undesired voice-band energy transfer from one circuit to another (usually adjacent).
CRPA - Controlled Reception Pattern Antenna
CRS - call reporting system
CRS - circuit switch routing
CRT - cathode ray tube
CRXC - continuous receive clock
CRYPTO - cryptographic
Crypto - Synchronizer Circuit - This circuit is used to synchronize external equipment. The circuit is pulsed whenever the DS3 signal is out-of-frame.
CS - communications security
CS - Communications Server
CS-ACELP - Conjugate-Structure Algebraic-Code-Excited Linear-Predictive
CS - circuit switch
CS - combat support
CSA - Combat Support Agencies
CSA - Computer Security Act
CSAP - Computer Security Accreditation Plan
CSAR - Channel System Address Register
CSC - common signaling channel
CSC - computer software component
CSCE - Communications System Control Element
CSCI - Commercial Satellite Communications Initiative
CSCI - computer software configuration item
CSD - cellular security device
CSD - Circuit Switched Data- A dial-up data communications channel which, once established, looks like a transparent data pipe. Also, the type of ISDN service required to utilize this capability of an ISDN circuit. In contrast to CSV.
CSDC - circuit-switched digital capability
CSDS - Packet Switched Data Service
CSE - Center for Security Evaluations
CSE - client server environment
CSE - Communications Security Establishment (Canada)
CSEL - combat survivor-evader locator (communications)
CSEL - circuit switch select line
CSET - computer security engineering team (USAF)
CSF - configuration strapping function
CSG - Cryptologic Support Group (NSA)
CSI - commercial SATCOM interconnectivity
CSI - Computer Security Institute
CSIPG - circuit switch trunk interface planning guide
CSIT - Customer Service Improvement Team
CSL - computer sensitive language
CSL - computer systems laboratory
CSLIP - (Compressed Serial Line Interface Protocol) - A version of SLIP using compression. See SLIP.
CSM - compartmented security mode
CSM - Command Sergeant Major
CSMA/CD - carrier sense multiple access/collision detection
CSNI - communications systems network interoperability
CSO - cognizant security office
CSO - communications service order
CSOLOP - Circuit Switch On Line Operational Program
CSOR - computer security objects register
CSP - common synthetic aperture radar processor
CSP - communications system processor
CSP - Common Security Protocol
CSP - call service position
CSP - Communications Support Package
CSPC - Call Service Position Console
CSPDN - circuit switched public data network
CSPE - Communication System Planning Element
CSR - commercial security requirements
CSR - circuit switch routing
CSR - communications status report
CSR - TEP circuit switch routing task execution plan
CSS - card and socket services
CSS - cascading style sheets
CSS - Central Security Service
CSS - commercial satellite survivability
CSS - common support system
CSS - communications support system (Navy)
CSS - COMSEC subordinate switch
CSS - communications subsystem
CSS - Circuit Switch Subsystem
CSS - combat service support
CSSC - Canadian System Security Centre
CSSCS - combat service support control system (Army)
CSSE - combat service support element
CSSI - computer security subsystem interpretation
CSSPAB - Computer System Security and Privacy Advisory Board
CSSTSS - combat service support training simulation system
CSTC - Computer Security Technology Center
CSTO - Computer Systems Technology Office
CSU - communications switching unit
CSU - computer software unit
CSU - customer service unit
CSU - call service unit
CSU - (Channel Service Unit) - A device at the customer's site that connects to a public carrier's T1 line at the Central Office. It provides bipolar violation correction, assurance of proper ones' density in the transmitted bit stream, and FCC tariff 68 network protection compliance.
CSU/DSU - A device which incorporates the functions of a CSU (Channel Service Unit) and a DSU (Data Service Unit) and interfaces between a Switched-56 (or "Dedicated Digital Service") line and a user's data equipment.
CSV - Circuit Switched Voice- A dial-up communications circuit for voice grade communication. Also, the type of ISDN service required to use this capability of an ISDN circuit. In contrast to CSD.
CSWG - communications systems working group (NATO)
CT - cryptologic technician
CT - cipher text
CT - communications terminal
CT - control telemetry
CTA - common table of allowances
CTAPS - Contingency Tactical Air Control System (TACS) Automated Planning System
CTASC-I - Corps/Theater Automatic Data Processing Service Center Phase-I
CTCD - cipher text data terminal ready
CTCPEC - Canadian trusted computer product evaluation criteria
CTCS - cipher text clear to send
CTDM - cipher text data mode
CTHA - Contra-wound Toroidal Helical Antenna
CTI - computer-telephone integration
CTI - Cryptologic Technician Interpretive
CTI - Control Terminal Interface
CTI - Criterion Test Instructions
CTIA - Cellular Telecommunications Industry Association
CTIC - COMSEC TRANSEC integrated circuit
CTID - communications transmission identifier
CTIS - combat terrain information system
CTIS - command tactical information system (Pacific Command)
CTL - Control
CTLL - cipher text local loopback
CTN - CALS test network
CTOC - Corps Tactical Operations Center
CTOS - convergent technologies operating systems
CTP - Communications Terminal Processor
CTP - common tactical picture
CTPA - coax-to-twisted-pair adapter
CTRL - control
CTRR - cipher text receiver ready
CTRS - cipher text request to send
CTS - clear to send
CTT - CommanderÕs Tactical Terminal
CTT-H/R - commanders tactical terminal-hybrid/receive
CTTA - Certified TEMPEST Technical Authority
CTTA - Certified TEMPEST Technical Authority
CTTH - CommanderÕs Tactical Terminal-Hybrid
CTTM - cipher text test mode
CTTR - cipher text transmit ready
CTTT - cipher text terminal timing
CTU - cabin telecommunications unit
CTX - cipher text transmit
CU - Common User
CU - control unit
CU - common unit
CUBE - command and control unified battlespace environment
CUI - character-oriented user interface
CUITN - Common User Installation Transport Network
CUL - common user language
CUM - cumulative
CUP - COMSEC utility program
Custom - ISDN - An ISDN protocol which pre-dates National ISDN-1. In most cases National ISDN-1 is also available. The Northern Telcom DMS-100 switch supports "Custom DMS ISDN". The AT&T/Lucent 5ESS switch supports "Custom Point-to-Point" (PTP) and Custom Point-to-MultiPoint (PMP). The ISDN protocol has no relation to where one may call.
CV - continuously variable
CV - community variable
CVAT - Coalition Vulnerability Analysis Team
CVBG - carrier battle group
CVDOW - combined voice and data orderwire
CVE - common vulnerabilities and exposures
CVGA - color video graphics array
CVS - cargo visibility system
CVSD - continuous variable slope delta
CVSDA - CVSD altered
CVSDM - (Continuously Variable Slope Delta Modulation) - A speech-encoding technique that encodes the difference between two successive signal levels using a 1-bit sample. The sampling rate that is usually used is 32,000 times per second, but lesser rates have been used successfully.
CVTS - compressed video transmission service
CVW - collaborative virtual workspace
CW - continuous wave
CWAN - coalition wide area network
CWAN - consolidated wide area network (Korea)
CWC - Composite Warfare Commander
CWIN - cockpit weather information system
CWSI - Cisco Works Switch Internetworks
CX - composite signaling
CXR - carrier D4 Superframe
CYMK - cyan-yellow-magenta-black (color model)
CYPRIS - cryptographic reduced instruction set processor
CYW - Cybernetic Warfare
CZ - canal zone
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