What must a customer do to use the COM ports for a powered device on a standard (noncustomized) HP rp5700 POS System?

A.
Set the jumpers on the system board for powered operation.

B.
Plug a powered device into the COM port which auto senses the voltage.

C.
Configure the powered device to draw power through the COM port.

D.
Request a service call for the powered configuration service (GH655AV).

Explanation:

Reference:
http://h18000.www1.hp.com/products/quickspecs/12703_na/12703_na.PDF
(see the paragraph on page 17)