1.

USDC forward and reverse control channels use exactly the same signalling techniques as AMPS.(a) True(b) FalseI have been asked this question during an online exam.The question is from United States Digital Cellular (IS-54 and IS-136) in chapter Wireless Systems and Standards of Wireless/Mobile

Answer»

Right choice is (a) True

Explanation: To MAINTAIN COMPATIBILITY with AMPS phones, USDC forward and reverse control channels USE exactly the same signalling techniques as AMPS. USDC VOICE channels use 4-ary π/4 DQPSK MODULATION with a channel rate of 48.6 kbps.



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