The Rx-to-PCMM function of the Multimedia Policy Engine allows the MPE to fulfill the PacketCable Application Manager (PAM) function defined by CableLabs, in addition to the Policy Server (PS) role. Diameter Rx messages are accepted, triggering policy decisions as well as PacketCable MultiMedia/2.0 (PCMM) messages to CMTS devices. In some cases, events at the CMTS or in the network cause a PCMM error code to be returned. In other cases, events or policy logic within the MPE may trigger a non-successful result code on the Rx interface.