Development of ISDN telephony. AWCapi supports almost every CAPI Supplementary Service and it has a built-in DTMF decoder/encoder (it supports as well the CAPI DTMF Facility, if present). Due to its true-asynchronous event driven model it can handle multiple calls at the same time. Calls can be handled through Voice Mail or directly from mic and speakers using the new DirectSound engine. Phone conversations can be very easily recorded. In addition, you have direct access to the actual incoming and outgoing sound to process it further or change if necessary. And more...

• VoiceAngel Voice Version 3.4
  This version has voice features including dial,answer,CID,DTMF,Wave Play/Record,call status judgement,but it do not have fax functions.

• VTapi ActiveX 1.9.8450
  What can be done with VTapi ActiveX Control: Detect Caller ID on incoming calls, Make and answer telephone calls, Detect DTMF key press tones, Generate DTMF tones, Execute any commands on modem, Build computer telephony integration systems (CTI), Interactive voice response systems (IVR), Voice mail, Audiotext, Automated attendants, Digital recording Predictive dialers, Telemarketing systems, Call center and more! Features: Caller ID - Name, number; Answer; Hangup; Call progress; Make Call; Dial - Completion of dialing on existing call; Generate DTMF - Generate tones - 0-9, *, #, A-D; Generate single frequency tones (beeps); Generate multi frequency tones; Generate simple melodies; Detect DTMF tones - remote party key presses; Execute any commands on modem (passthrough mode); Enumerate telephony devices; Telephony device setup dialog; Get/Set Current Line Device; Enumerate installed telephony/modem devices; Software Silence Detection; Software busy and dialtone detection; Software media tone detector - single and dual frequency detector; Text-to-speech support (SAPI4 and SAPI5); Playback WAV files (in any format!) over phone line; Record WAV files from phone line; Emulator is available - you can emulate incoming rings as well as DTMF key presses; many other features available!