The present invention relates to method and system for providing a ring back tone service by using a play announcement message in an intelligent network. A memory device built up from such memory cells and a method of manufacturing such memory cells is also disclosed. Depending on FBI detections for each link, the scale factors are then applied to the downlink channel response estimates. When a bid is selected, the consumer transacts remotely to complete the purchase thereof. The valve member portion has at least a coating of polytetrafluoroethylene or equivalent material.