Interface your applications to the telephone system. Dial calls automatically, perform actions in response to incomming calls, handle multiple lines and interface to switchboards.

C/C++ Telephony Components by Black Ice Software

Fax C++/ActiveX Developement Toolkit 12.50

The FAX C++/ActiveX is designed to allow developers to combine Fax and Data. It is fully object oriented, and takes into account the new emerging technology in faxing communications. Developers can build black and white or color faxing applications within a few days using the Fax C++/ActiveX toolkit and can support a range of fax hardware platforms with a single application.

C/C++ Telephony Components by BearWare.dk

TeamTalk 3 SDK V3.5b -  The TeamTalk 3 SDK provides users with a simple way to integrate a VoIP client into their existing applications.

C/C++ Telephony Components by conaito

VoIP Extended SDK V3.0 -  Our conaito VoIP Extended SDK (Service Development Kit) is an ultimate tool for developer to develop VoIP- (P2P telephony via internet protocol) and messaging applications (chat) or to integrate it into websites. The SDK enables a worldwide communication over the internet or intern networks either by speaking and/or by text messages.

VoIP Standard SDK V5.0 -  Our conaito VoIP Standard SDK (Service Development Kit) is an ultimate tool for developer to develop VoIP- (P2P telephony via internet protocol) and messaging applications (chat) or to integrate it into websites. The SDK enables a worldwide communication over the internet or intern networks either by speaking and/or by text messages.