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Which of the following channel is similar in functionality to the SAT used in AMPS?(a) DTC(b) CDVCC(c) SACCH(d) FACCHThe question was asked during an interview.The origin of the question is United States Digital Cellular (IS-54 and IS-136) in division Wireless Systems and Standards of Wireless/Mobile

Answer»

Right ANSWER is (b) CDVCC

Explanation: CDVCC (Code Digital Verification Color Code) is a 12 bit message sent in EVERY time slot and is similar in functionality to the SAT used in AMPS. The CDVCC is an 8 bit number RANGING between 1 and 255, which is protected with four additional channel coding bits from a shortened Hamming code.



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