The expansion of Internet services among cable TV networks is demanding more effective network management. Two-way data communications require higher service quality than one-way broadcasting. A significant challenge faced by cable TV network management is that completely different applications are utilized to manage IP devices and non-IP devices on the same network. In this paper, we propose an SNMP proxy agent for managing amplifiers. To do this, we expand the protocol currently used by the amplifiers. Subsequently, we implement three variations of the SNMP proxy agent and compare the functionality and limitations of each.