Briefly, this invention contemplates the provision of a call pacing method in which the number of calls to dial is periodically (e.g. every two seconds) determined on the basis of anticipated operator availability. The determined number of calls are dialed, subject to a limiting function. Calls in progress...http://www.google.de/patents/US5179589?utm_source=gb-gplus-sharePatent US5179589 - Call progress pacing
