Reprogrammable subscriber terminal

摘要: A reprogrammable subscriber terminal of a subscription television service which can have the control program code its processor modified by downloading new from headend. The stores boot in an internal read only memory. Upon start up and resets, determines whether should be changed command sent command, termed parameters transactions, includes number expected download transactions required to complete modification, memory space areas where is loaded, channel over are transmitted. tuned when receives all accurately them, will cause restarted at selected address or has been downloaded. may different configurations terminals including those with Flash EPROM extended memories plug-in expansion modules.