CDD Cyclic Delay Diversity
CDMA Code Division Multiple Access
CDN Coupling/Decoupling Network
CDR Charging Data Record, данные отчётов о тарификации.
CDUR Chargeable DURation
CE Coverage Enhancement расширение охвата
CED called station identifier
CEIR Central Equipment Identity Register
CEND end of charge point
CEPT Confеrence des administrations Europеennes des Postes et Telecommunications
CF Conversion Facility
all Call Forwarding services
CFB Call Forwarding on mobile subscriber Busy
CFI Control Format Indicator, управляющий индикатор формата, передаваемый в нисходящем направлении в физическом канале PCFICH.
CFN Connection Frame Number
CFNRc Call Forwarding on mobile subscriber Not Reachable
CFNRy Call Forwarding on No Reply
CFU Call Forwarding Unconditional
CG Cell Group
Carrier Group
CGI Common Gateway Interface
CHAP Challenge Handshake Authentication Protocol
CHP CHarging Point
CHV Card Holder Verification information
CI Cell Identity
CID Cell-ID (positioning method)
CID Cell-ID (positioning method)
CIF Carrier Indicator Field
CIM Common Information Model
CIoT Cellular Internet of Things
CIR Carrier to Interference Ratio
CK Cipher Key
CKSN Ciphering Key Sequence Number
CLA CLAss
CLI Calling Line Identity
CLIP Calling Line Identification Presentation
CLIR Calling Line Identification Restriction
CLK Clock
CLNP Connectionless network protocol
CLNS Connectionless network service
CM Connection Management
CMAS Commercial Mobile Alert Service
CMC Connection Mobility Control
CMD Command
CMIP Common Management Information Protocol
CMISE Common Management Information Service
CMM Channel Mode Modify
CN Core Network
Comfort Noise
CNAP Calling Name Presentation