I use Microsoft TAPI 3.0 to make video and voice communicating applications. This project was edited using Visual Studio .NET. Microsoft Platform SDK is needed to compile.
VOIP simple test map:
- Direct PC to PC case: two PCs, VideoIPPHONE
- PC to PC through Gatekeeper(H.323) case: Gatekeeper(H.323), two PC, VideoIPPHONE
- PC to PSTN case: Gateway(H.323), Gatekeeper(H.323), one PC, VideoIPPHONE, telephone
You can get the Microsoft TAPI 3.0 information from here.
You can make VOIP that uses SIP or H.323 Protocol.
SIP protocol opensource site is Vovida.
H.323 protocol opensource site is openh323.
Using the Code
Try connection to acceptor.
CMsTapiOutgoing outgoing.StartMsTapi(4, wszIpAddress);
// 4 is option for LAN .
Answer from sender:
Points of Interest
Microsoft TAPI 3.0 has a bug.
When the application communicates to PSTN terminal through the CISCO H.323 gateway, the application or PSTN terminal sends sound one way only.
It is because during communication through RTP port is divided.
CISCO H.323 Gateway