US Patent 7173907 Voice over ATM AAL2 bandwidth allocation methodology

Method and apparatus for allocating bandwidth in a virtual channel connection. The number of fax calls expected in a trunk group is divided by the number of DS0s in the trunk group and multiplied by the number of DS0s in a subset of the trunk group. The result equals the number of fax call circuits for the subset. The number of voice call circuits for the subset equals the number of DS0s in the subset minus the number of fax call circuits for the subset. The number of fax call circuits is multiplied by the full DS0 bandwidth. The number of voice call circuits is multiplied by the bandwidth per voice call. The total bandwidth for the subset equals the bandwidth for fax calls plus the bandwidth for voice calls. These steps are repeated for other subsets entering an interface to determine the total bandwidth needed by the VCC.