and a network manager. The staff managers have to use business transactions. Such access must be protected from misuse the alternatives available to adjust the staff levels to meet the by unauthorised users and non-employees. In the most common performance goals under the current traffic load. Reassigning staff forms of protection, the network access numbers are disclosed only between applications, from less busy to more busy, may be the first to authorised users, and individual employee identification numbers alternative. This should not require hardware changes, but it must are assigned which must be dialled with each call. The access be possible by software commands to the configuration database. A numbers are changed periodically as a further preventative step. resource pool of part time employees who are willing to work The tandem switches in the network should validate identification flexible hours as needed, is another alternative. Another choice may numbers before access is allowed, then provide automatic least cost be to let an interactive call response unit record caller information routing for approved calls according to the caller's privileges on the with the intent of the servers calling back as soon as the current network. The alternate route choices are ordered and automatically traffic peak passes. tried by increasing cost for the time of day and day of week. The Managers in applications using more than one ACD may have caller identification, the route choice, plus other call information is another alternative to balance traffic. The ACDs may be able to entered in the call detail record. From the call detail and circuit automatically transfer a portion of the calls waiting for service to Call accounting 36/5 each other to balance the traffic loads. This is especially effective 36.3.3 Hospital/University environment when the ACDs are in different time zones with peak traffic some- what time dependent. In this manner the ACDs work to provide The hospital and university environment also requires very