CB
Circuit breaker
CBM
Combined backplane module
CCITT
Consultative Committee for International Telegraph and
Telephony. A United Nations-sponsored standards body within
the International Telecommunications Union.
CCM
CAN carrier module
CCVT
Capacitive Coupled Voltage Transformer
Class C
Protection Current Transformer class as per IEEE/ ANSI
CMPPS
Combined megapulses per second
CMT
Communication Management tool in PCM600
CO cycle
Close-open cycle
Codirectional
Way of transmitting G.703 over a balanced line. Involves two
twisted pairs making it possible to transmit information in both
directions
COM
Command
COMTRADE
Standard Common Format for Transient Data Exchange format
for Disturbance recorder according to IEEE/ANSI C37.111,
1999 / IEC60255-24
Contra-directional
Way of transmitting G.703 over a balanced line. Involves four
twisted pairs, two of which are used for transmitting data in both
directions and two for transmitting clock signals
COT
Cause of transmission
CPU
Central processing unit
CR
Carrier receive
CRC
Cyclic redundancy check
CROB
Control relay output block
CS
Carrier send
CT
Current transformer
CU
Communication unit
CVT or CCVT
Capacitive voltage transformer
DAR
Delayed autoreclosing
DARPA
Defense Advanced Research Projects Agency (The US
developer of the TCP/IP protocol etc.)
DBDL
Dead bus dead line
Section 14
1MRK 511 366-UUS -
Glossary
186
Commissioning manual
Содержание RES670 2.1
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