 of information must be at appropriate sizing of trunk circuit groups and accurate answer organised and summarised into manageable reports and displays. If detection for outbound calls. While inbound calls may follow a the switching systems cannot perform this function directly, then uniform distribution, outbound call attempts may often experience there are many choices available for add on call accounting systems extreme peaks during the evening registration period and following and outside services. the closing of large meetings. General guest dissatisfaction can The add on call accounting systems and service bureaux compete occur if it is consistently difficult to get an outside line and often for customers by offering a wide range of reports, formats, data necessary to go somewhere else to make calls. If guests are billed selection methods, and display outputs. If the user wants a report for outside calls, then it is important to know whether calls are only which currently does not exist, then the system may provide online attempts or are completions. Making the determination based solely report creation capability, or the vendor may offer this as an optional on call duration is an inaccurate approach, which opens the way for service. the guests to contest phone charges on individual calls. Answer The standard list of report choices include: call by call detail by detection performed with a high degree of accuracy by the PABX, time, by extension and by trunk circuit, busy hour, plus summaries or by an attached call management system monitoring the trunk by extension, department, account code, trunk circuit, and trunk circuits, becomes important to the hotel and guests. group. These same reports are offered in a weekly, bimonthly, With an interface to the front desk and direct connection to the monthly and yearly version. Bar, pie and line graphic charts, and PABX, excessive phone charges can be controlled. At registration histograms are common alternative formats to the standard analyti- an established credi