 accurate better individual performance and better performance over all the call billing information since users pay for individual toll calls. This network. The network manager determines the most effective ways environment and the corporate environment share the same call to move the calls between the ACDs. management requirements for least cost routing alternatives when If staff adjustments or other alternatives cannot be made, then large campus installations are created using multiple PABXs con- management may attempt to limit calls coming into the system. A nected in a network. queue limit or waiting time for service can be established. When the Call restriction capability is less important, however, than in the limit is exceeded an announcement is played to the caller indicating corporate environment simply because the PABX is a revenue the expected wait time and alternatives they may have, such as producer. calling back later, leaving a message, or transferring to another department. A more definitive action may also be taken in that if the 36.3.4 Client environment established queue limit is reached, then any new calls beyond the limit receive a timed period of busy or re-order tone and are then The client environment is that segment of business where calls are disconnected. If callers immediately call back, then this alternative to be billed to a client or account rather than to the person making may actually be counter productive. the calls. The caller enters the account or billing code for the call An external call management system may be connected to the along with the destination number. The PABX enters the code into ACD for staff scheduling and forecasting of staff and trunk circuit the call detail information. requirements processing. ACD applications commonly operate full PABX attendants may also perform a similar operation if an time every day with full and part time staff. Scheduling and fore- outcall cannot be placed directly, but only by way of the attendant. casting for this staff becomes a 