An open cable set-top box diagnosing system in which a point of deployment (POD),
separated from a main circuit unit, having a newly defined interface is used to
check an operation state of an open cable set-top box, transmits the checked state
to a predetermined server, according to which the operation state of the open cable
set-top box is diagnosed. The open cable set-top box diagnosing system includes
an open cable set-top box for checking its own operation state by using a diagnosis
resource by a communication protocol between a point of deployment (POD) separated
from the main circuit unit and the main circuit, and a head end for providing a
service corresponding to a request signal received from the open cable set-top
box or providing a broadcast program to the open cable set-top box, and checking
the operation state of the open cable set-top box.
