单选题What is the bandwidth requirement of an active duplex wireless call using G.711 codec?（）A64 kb/sB91.2 kb/sC173 kb/sD183 kb/sE211 kb/s
单选题
What is the bandwidth requirement of an active duplex wireless call using G.711 codec?（）
A
64 kb/s
B
91.2 kb/s
C
173 kb/s
D
183 kb/s
E
211 kb/s
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