1. A system for customizing a communications network, the system comprising: a first communications device; a second communications device associated with a network address; a storage device containing at least one prerecorded announcement; wherein said first communications device accesses said system for the purpose of creating an association between said network address and said prerecorded announcement; and wherein said first communication device replaces at least a portion of an audible call progress signal intended for said second communications device with said prerecorded announcement.