The object is used to set the working mode of the COMBO board.
Options:
1.combo(1) -the broadband and voice parts of the board are powered on
2.powerSaving(2) -the board cuts off the power supply of the broadband part
3.auto(3) -normally the broadband and voice parts of the board are powered on
When the mains supply is cut off, the board automatically cuts off
the power supply of the broadband part