A method and system for managing a large network of switching end-points to route calls by time of day and day of week over a packet switched network (ATM or Voice over IP). The preferred management mechanisms determine circuit and location availability and include means for removal and replacement of circuits from network-wide service, even in a private, packet-switched network. In an automatic call distribution environment, the method is an economical and efficient process for facilitating a caller's ability to access users in workgroups wherein the users utilize either wired or wireless communications tools. Users are chosen via a rule-based selection process including access to a database of users, caller-screened information, and circuit and location availability.