INTERNATIONAL TELECOMMUNICATION UNION ITU-T RECOMMENDATION SUMMARY Rec. No. : D.110 Title : Charging and accounting for conference calls Study Group : III - Tariff and Accounting Principles Version : Revised Date of adoption : 1992 Notes : Recommendation D.110 sets out the general principles and conditions for the charging and accounting of international conference calls. A conference call is one in which three or more different individual customer locations are connected through a bridging device, allowing all call participants to hear and/or address the others. There are two categories of conference call arrangements. In the first, the organizing customer arranges to have the conference set up by the service supplier, and all the participants are called either by the operator or through some other process at a preset time. The other category does not require the assistance of an operator to establish the conference. The conference originator accesses the conference bridge and dials the conference participants directly, or the conference participants dial into the conference bridge facility at a predetermined time. Recommendation D.110 sets out the charging principles for the conference bridges and for the calls involved in this conference. To order the complete text of this Recommendation, please use the Order Form for ITU-T Recommendations. An electronic version of this form is available on ITUDOC (Winword: UPI=ITU-5265; ASCII: UPI=ITU-2488).