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CAUTION:
• It is recommended to select the DIP switch of the fixed E1 interface in this way: when connecting 75-ohm
cable, flip BIT1-8 to ON, and when connecting 120-ohm cable, flip BIT1-8 to OFF.
• By default, all of the DIP switches are factory-confi
ured to ON, that is, the impedance of E1 interface
is 75-ohm.
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