BOC (Bell Operating Company)

An operating telephone company owned by the AT&T Bell Sys-

tem and reporting directly to AT&T general headquarters. The 22 BOCs were spun off from AT&T as a result of the Modified Final Judgement (MFJ), also known as the Divestiture Decree, which took effect January 1, 1984. At that point, the BOCs were formed into seven Regional Bell Operating Companies (RBOCs). See also Bell System, MFJ, and RBOC.

• CRC (Cyclic Redundancy Check)
• critical angle
• critical angle
• crossbar
• cross-connect
• crossreed
• cross-talk
• crosstalk (XT)
• CRTC (Canadian Radio-television and Telecommunications Commission)
• cryptography
• cryptology
• crystal oscillator (XO)
• CSA (Carrier Serving Area)
• CS-ACELP (Conjugate Structure-Algebraic Code Excited Linear Prediction)
• CSA International
• CS (Convergence Sublayer)
• CSD (Circuit-Switched Data)
• CSLIP (Compressed Serial Line Internet Protocol)
• CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance)
• CSMA (Carrier Sense Multiple Access)
• CSMA (Carrier Sense Multiple Access)
• CSMA (Carrier Sense Multiple Access)
• CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
• CSTA (Computer Supported Telephony Applications)
• CSU (Channel Service Unit)