单选题What is the minimum recommended access point overlap for voice roaming？（）Aless than 10 percentB10 to 15 percentC15 to 20 percentD25 to 30 percent
单选题
What is the minimum recommended access point overlap for voice roaming？（）
A
less than 10 percent
B
10 to 15 percent
C
15 to 20 percent
D
25 to 30 percent
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