单项选择题
Which of the following is not necessary to consider when surveying a potential site? （）
A. Space for antennas
B. Frequency allocation
C. Electrical power availability
D. Permission/Contract with owner
E. Availability of PCM link to the BSC
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相关考题
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单项选择题
A subscriber makes a two-minute call and a four-minute call during the busy hour. How much traffic does he generate for that hour? （）
A.33 millierlangs
B.66 millierlangs
C.100 millierlangs
D.10 millierlangs
E.25millierlangs -
单项选择题
Reusing frequencies in a cellular pattern (compared to “one big cell”)（）
A. Increases channel utilization, cost ,and interference.
B. Increases capacity and cost, but decreases interference.
C. Increases capacity, but decreases cost and interference.
D. Increases capacity, cost, and interference. -
单项选择题
Which cell pattern is recommended to use when using frequency hopping? （）
A.4/12
B.3/9
C.7/21
D.7/7
