A system for yielding control of a network to a device configured to operate on a PSTN. The system includes a network configured to couple one or more devices to a PSTN, and a PSTN telephone, a PSTN security system, and an ATA and modem coupled to the network. The ATA and modem are configured to provide a VoIP interface between the network and the Internet and to provide a dial tone to the network. An access detector is coupled to the network to detect when the security system attempts to use the network.