The present invention specifies the mechanism for supporting end-to-end quality of service (QoS) reservations for an implicit reservations model using a Resource and Admission Control Function (RACF) apparatus. The invention teaches how to implement implicit resource reservations using the open-standard Resource and Admission Control Function (RACF), which is being standardized in ITU-T. Several methods are covered: 1) With a first method, a general distributed approach has been specified. 2) For a second method, the terminating RACF keeps the state of the reservations, so the resulting protocol is relatively simple, robust, and easy to implement. 3) A third method, which can be based on either of the above methods or their combination, starts reservations at both, the terminating and originating RACF ends and works toward the meet-me point.