Patent ID: 8081565

Claim:
A method comprising: receiving a first admission-control request to establish a first call by a private branch exchange; establishing the first call from the private branch exchange when and only when a first predictor predicts a first value of a quality of service metric for the first call, wherein the first value is above a threshold; receiving a second admission-control request to establish a second call by the private branch exchange; evaluating how well the first predictor performs, wherein the evaluating comprises an efficiency measure that is based at least in part on: (i) whether the first call was established, and (ii) a measure of the quality of service metric of the first call; updating a parameter of the first predictor based on the results of the evaluating, resulting in a second predictor; and establishing the second call from the private branch exchange when and only when the second predictor predicts a second value of the quality of service metric for the second call, wherein the second value is above the threshold.