A network device includes a media gateway to receive and process a voice over digital subscriber line (VoDSL) communication to generate voice data in a predetermined format; a terminating unit to receive another type of voice communication and output voice data in the predetermined format; and a control unit to receive the generated voice data from the media gateway and the outputted voice data from the terminating unit, where the network device exchanges at least one of the VoDSL communication to the other type of voice communication or the other type of voice communication to the VoDSL communication.