CCITT Consultative Committee for International Telegraph andTelephony. A United Nations-sponsored standards bodywithin the International Telecommunications Union.CCM CAN carrier moduleCCVT Capacitive Coupled Voltage TransformerClass C Protection Current Transformer class as per IEEE/ ANSICMPPS Combined megapulses per secondCMT Communication Management tool in PCM600CO cycle Close-open cycleCodirectional Way of transmitting G.703 over a balanced line. Involvestwo twisted pairs making it possible to transmitinformation in both directionsCOM CommandCOMTRADE Standard Common Format for Transient Data Exchangeformat for Disturbance recorder according to IEEE/ANSIC37.111, 1999 / IEC 60255-24Contra-directional Way of transmitting G.703 over a balanced line. Involvesfour twisted pairs, two of which are used for transmittingdata in both directions and two for transmitting clocksignalsCOT Cause of transmissionCPU Central processing unitCR Carrier receiveCRC Cyclic redundancy checkCROB Control relay output blockCS Carrier sendCT Current transformerCU Communication unitCVT or CCVT Capacitive voltage transformerDAR Delayed autoreclosingDARPA Defense Advanced Research Projects Agency (The USdeveloper of the TCP/IP protocol etc.)DBDL Dead bus dead lineDBLL Dead bus live lineDC Direct currentDFC Data flow controlDFT Discrete Fourier transformSection 23 1MRK 505 393-UEN BGlossary438 Line differential protection RED650 2.2 IECApplication manual
