Q. _________ allows base and mobile to distinguish each other from co-channel users located in different cells.

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Q. AMPS and ETACS use same physical channels for transmission of voice and control channels.

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Q. To increase the capacity of AMPS, Motorola developed ____________

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Q. The dual mode USDC/AMPS system was standardized as ____________

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Q. USDC is also known as ___________

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Q. USDC was designed to share different frequencies as compared to AMPS.

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Q. Because of the compatibility with AMPS, USDC is also known as ___________

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Q. USDC forward and reverse control channels use exactly the same signalling techniques as AMPS.

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Q. USDC has ___________ as many control channels as AMPS.

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Q. Which of the following data channels of USDC carries the user information?

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Q. Which of the following channel is similar in functionality to the SAT used in AMPS?

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Q. Which of the following channel in USDC provides a signalling channel?

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Q. Which of the following channel in USDC is used to send important control or specialized traffic data between the base station and mobile units?

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Q. Which of the following speech coder is used in USDC?

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Q. Which of the following is the world’s first cellular system to specify digital modulation and network level architecture?

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Q. Previously in 1980s, GSM stands for ____________

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Q. Who sets the standards of GSM?

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Q. Which of the following does not come under the teleservices of GSM?

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Q. Which of the following comes under supplementary ISDN services?

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Q. Which of the following memory device stores information such as subscriber’s identification number in GSM?

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