1. In a telecommunications network, a computer program product comprising a computer-readable medium having control logic stored therein for causing a computer to customize a subscriber unit having a dynamically programmable push button, the control logic comprising computer-readable program code for causing the computer to: receive subscriber unit identification information, wherein the subscriber unit identification information corresponds to a subscriber account and a programming permission code associated with the subscriber unit having the dynamically programmable push button; receive a subscriber request for access to an advanced application located within the telecommunications network; determine whether access to the advanced application is granted based upon the subscriber account; and program the dynamically programmable push button of the subscriber unit with a directory number if access is granted, wherein the directory number provides direct access to the advanced application.