Predictive dialers all work on a theory of dialing ahead to attain the results they do in order to supply the sizeable boost in dial rates and representative efficiency attained. If a system has 100 representatives working on it, the dialer will dial a greater quantity, typically based on a predetermined ratio, like 1.5:1, 2:1, etc. This indicates that for 100 representatives logged on, the system will make 150 outgoing calls. While these calls are made to the telephone network, the dialer will observe each call and decide what the result of the call was.
From our 150 calls dialed, the system will right away take out any inefficient results, like busy calls (these are normally sent for automatic redial), no answers, answering machines, wrong numbers, etc.
From what is left over, if a call is established as having been answered by a live person, this call is only then passed through to a representative. From those calls that are actually answered by a person, the hope is that there will be sufficient representatives that are able to take those calls.
If not enough calls are made ahead, the representatives will sit inactive, if too many calls are made and there are not enough representatives to take them, then the call is usually dropped (the person just dialed is hung up on - if you have ever received a mysterious phone call where there was no one on the other end, then it is likely a predictive dialer was trying to reach you).
The technique for predictive dialer companies is to build their systems intelligent enough that they are able to respond quickly by amplifying or reducing the dialing ratio used in order to produce more or less calls to dial.
For more information on predictive dialers, visit: www.useddialers.com/what-is-a-predictive-dialer.htm.