DTMFDial 

Emits DTMF tones including A, B, C and D using PC sound card. Features programmable memory, last 16 number redial and single instance tool-tray operation.
tone dial sound

VTapi ActiveX 

VTapi ActiveX Control you get everything you need for quality communications using Microsoft Visual Basic, Visual C++, or any other environment capable of hosting ActiveX components. Create IVR systems, answering machines, detect caller ID and more!
tapi actovex ocm modem voice call playback predictive vtapi sound card board caller