Abstract: An operating system independent distributed self-contained dynamic logic system is disclosed. The dynamic logic system enables EO functionality in small edge routers or programmable switches which serve a small population of users instead of the rather large population typically served by a 5ESS or DSM100 central office switch. A disclosed method provides the capability for EO switch enhanced functionality that is programmable from a remote location The dynamic logic system may be implemented across several elements, including a subscriber database called a Service Control Point (SCP), a computer called a Service Management Point (SMP) for controlling and distributing programmable logic to implement EO features, and an Edge Switching Point (ESP) for interacting with a physical device (telephone/data endpoint). The dynamic logic system may be introduced at the “intercept” layer between the physical edge switching point device, typically a telephone interface, and a routing network.

Abstract: A software process setting time limits for telephone calls so that a subscriber's account balance is not exceeded. The method estimates the time when the subscriber's balance will expire by using total charges for all calls per second. The process accounts for time already paid for, reserving the minimum continuation time for adding a new call, reserving time for all calls up to the latest paid for time, dividing the remaining balance by total charges per second to estimate the time left before the subscriber's balance reaches zero, an setting the time limit for each call accordingly.