Patent ID: 7634797

Claim:
A method of interfacing with a host device receiving a broadcasting signal in an open cable diagnosing system, the method comprising: descrambling a scrambled broadcasting signal received through an in-band interface and transmitting the descrambled signal to the host device; sending a diagnostic request object to the host device to perform a specific set of diagnostic functions through a central processing unit (CPU) interface in accordance with a diagnostic resource; and receiving a diagnostic confirmation object including a diagnostic result of the performed diagnostic functions from the host device through the CPU interface in accordance with the diagnostic resource, wherein the CPU interface defines a resource layer between an application layer and a session layer, the resource layer including the diagnostic resource, wherein the diagnostic request object includes a plurality of identifiers, each identifier being assigned to one of plural functional units in the host device to be checked for a corresponding diagnostic status, wherein the CPU interface defines a data channel between a CPU of the POD module and a CPU of the host device, and wherein the diagnostic request object and the diagnostic confirmation object are exchanged between the host device and the POD module through the data channel.