We are using phpClassifieds from Deltascripts.com. This works fine for us. It is a standard classifed ad system,
But we need to ad the following. Advertizers are to be able to enter a phone number which will connect up to a phoneback system.
We have all the pieces and documentation - just a question of getting it to hook up nicely. Attached is the documentation for the call back system. The links would appear on any of the ads which had the caller system enabled.