1. What is the range of frequencies assigned to

a) AMPS
b) USDC
c) GSM Europe
d) GSM US
e) Spread Spectrum

2. What are the multiple-access methods for the above systems?

3. How is the full duplex mode implemented in cellular telephones?

4. What modulation scheme is used in each of the five systems listed in question 1?

5. What is the purpose of using directional antennas in stations? Give two examples.

6. Describe the frequency reuse method in AMPS.

7. How many slots per time frame are used in

USDC   (check one)   2    3   6    8  16 40
GSM     (check one)   2    3   6    8  16 40

8. Describe briefly the handoff (what is it? why is it used?)

9. Who controls the power of the transceiver in the mobile phone:  user?  station? Why is this being done?

10. How does the station know the identity of the phone it is communicating  with in a) AMPS b) USDC c) GSM

11. Which system is the most vulnerable to ID theft and why?

12. Why does the mobile phone have the "send" button ?

13. Why, in your opinion, is the cellular phone communication still of lower quality than the regular phone
communication?

14. Why is digital cellular telephony replacing AMPS?

15. List features other than voice communications that are now being added to cellular phones
(list at least four, e.g. paging, web browsing, e-mail, data port, phone lists, SMS (what is it?))
see e.g. http://www.cnn.com/2000/US/07/08/smog.pagers.ap/index.html