1. A method for routing telephone calls at customer premises having a telephony switch, individual telephones connected to the telephony switch, and computer workstations including video display units (VDUs) connected on a local area network (LAN) also coupled to the telephony switch, wherein individual ones of the computer workstations are located proximate individual ones of the telephones, the method comprising: receiving a telephone call at a telephony switch connected to individual telephones at the customer premises; broadcasting identifying data for the telephone call to first and second computer workstations of the computer workstations, via the LAN; determining a routing for the call at one of the first and second computer workstations by use of a client interface, and transmitting the routing determination to a client-server router via the LAN connection, wherein the determining the routing for the call is based on the broadcast identifying data and a routing rule associated with a user of the one of the first and second computer workstations; and routing the telephone call to the one of the first and second computer workstations but not a second one of the first and second computer workstations by the client-server router according to the routing determination transmitted to the client-server router via the LAN connection.