单项选择题
What is the minimum recommended uplink/downlink speed to support a single encrypted IP voice Teleworker call?()
A.256kbps / 1024kbps
B.256kbps / 1544kbps
C.160kbps / 768kbps
D.384kbps / 384kbps
E.128kbps / 512kbps
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