A system for processing phone calls comprising a network of servers in communication with telephonic communication devices, and software stored on and executable by the servers, the software being configured to receive inputs from a user, generate an ordered set of PBX Feature definitions executable by the server network in a distributed fashion to perform respective PBX Feature tasks related to telephone calls, and write the PBX Feature definitions to a distributed database system that is accessible by the servers. The ordered set may evaluate the current state of a phone call, and each PBX feature definition may perform a respective task responsive to the evaluated state. Each PBX Feature definition is executable to define and store a new state of the phone call. Each PBX Feature definition generated by the software is configured to be combined with any other PBX Feature definition generable by the software.