单选题Which of the following components is typically used for voice transmissions and has a 10Mbpsmaximum transfer speed?（）A110 blockBPatch panelCVertical cross connectD66 block
单选题
Which of the following components is typically used for voice transmissions and has a 10Mbpsmaximum transfer speed?（）
A
110 block
B
Patch panel
C
Vertical cross connect
D
66 block
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