1. A method of administering a plurality of managed systems in a managed network using a voice interface, the method comprising: storing a configuration data store comprising a system speech profile corresponding to at least one managed system of the plurality of managed systems, wherein the system speech profile specifies which capabilities of the at least one managed system are available on the managed network and which capabilities are to be voice-enabled and made accessible via a telephony interface; and automatically generating a grammar and a speech dialog for the at least one managed system using the system speech profile, wherein: the speech dialog for the at least one managed system includes at least one generated audio prompt that is played via a telephone in response to accessing, via the telephony interface, at least one of the capabilities of the at least one managed system that are specified in the system speech profile to be voice-enabled, and wherein the at least one of the voice enabled capabilities comprises at least one administrative function to administer the at least one managed system, the grammar is used to process speech input received from a user in response to the at least one generated audio prompt, the speech dialog allows the user to administer the at least one managed system by accessing the at least one administrative function via at least one voice command, and the at least one generated audio prompt comprises information extracted from a response from the at least one managed system responsive to the at least one voice command as dictated by the configuration data store.