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Which of the following has no backward compatibility with 3G Cdma2000?

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Which of the following has no backward compatibility with 3G Cdma2000?

(a) IS-95

(b) GPRS

(c) IS-95A

(d) IS-95B

I had been asked this question by my college professor while I was bunking the class.

My question is from 3G Cdma2000 topic in division Modern Wireless Communication Systems of Wireless/Mobile

1 Answer

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Best answer
Right choice is (b) GPRS

Easiest explanation: 3G Cdma2000 is based on the original IS-95 and IS-95A CDMA standards, as well as the 2.5G IS-95B air interface. While upgrading, Cdma2000 maintains backward compatibility with existing IS-95, IS-95A and IS-95B equipments. Thus, Cdma2000 allow wireless carriers to introduce a family of new high data rate Internet access capabilities within existing systems.

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