The SimpleIAX is basically a translation of the IAXClient header file to the Delphi and the compact set of the Delphi classes, which are using the iaxclient.dll. The classes are wrapping the IAXClient API into the more high-level Delphi OO API, and hiding many original IAXClient library pitfalls.

The IAXClient library is a portable IAX/IAX2 protocol telephony client library. The IAX/IAX2 protocol is used to communicate with Asterisk IP-PBX server.

The IAXClient library is compiled into iaxclient.dll. The up-to-date and tested version of iaxclient.dll is supplied with the SimpleIAX library in the Bin folder. And we does not recommend to use other DLL versions with SimpleIAX.
 
Demo only
Source: On purchase/registration
Price: $99
Exe-Demo Included

• Answer an incoming phone calls
• Make PC to phone or PC to PC calls via VoIP providers
• Detect DTMF user input
• Send DTMF (Inbound, SIP INFO, RFC2833)
• Select Audio In/Out Devices
• Audio Codecs: G.721 A-law/Mu-law, GSM.610
• STUN server may be used to find out the public IP address
• Hold/Unhold calls
• Handle multiple SIP calls at the same time
• Unattended call transfer

 
Evaluation (time-limit)
Source: None
Price: $199
Exe-Demo Included

VCP brings audio processing and streaming into your software solutions.

"We supply the means to building the next generation chat system using our technology makes it very easy to build and develop your very own chat site."
 
Not available
Source: On purchase/registration
Price: $100
Source Price: $500

The transfered data are scrambled using on-the-fly 128-bit AES encryption. The security is provided in two different modes: symmetric encryption with shared secret key and asymmetric encryption with 1024-bit public/private keys.

The server is responsible for keeping information on and authentication of online peers. All peers connected to a particular server build a single private community. Fine grained access control is realized by a group of user-oriented permissions. They grant access control privileges to system resources and services in a flexible and secure manner. The voice stream is highly compressed to deliver the best possible sound over a limited-bandwidth connection.

In addition, the average bitrate is reduced thanks to the silence compression. In the encoder, a voice activity detector with an adjustable trigger level is used to distinguish between regions with normal speech activity and those with silence or background noise. Significant echo suppression is achieved using a robust double talk detector. Capability to mute recording and mute playback is implemented. The incoming and outgoing audio data are available in raw PCM format for visualization in the application. Two special events notify about signal overloading (possible distorsions) and transmission delays (network congestions). Two different kind of text information can be exchanged between peers: alert and chat messages. File transfer capability is implemented for direct file exchange between peers.

BigSpeed Voice Chat SDK utilizes an elegant event-driven paradigm for easy integration into Windows applications.A special attention is paid to provide responsive user interface while avoiding multithreading problems.

Sample applications are included in Visual Basic 2005 and Delphi 7.
 
Fully functional
Source: None

• Encrypted Voice & Text Chat:
  It is the best feature of VaxVoice activeX components. Using this feature, Vax Voice controls send/receive encrypted voice and text data over the Internet.
• Multiuser Voice Conferencing:
  Using this feature, three or more people can have a real-time voice conference.
• Voice Conversation Recording:
  Using this feature, during the conferencing, you will be able to record the conversation into wave (.wav) file for later play back.
• Text Chat:
  During the conference, you will be able to have text chat.
• VAD (Voice Activity Detection):
  When you enable this feature, Vax Voice activeX starts sending voice data only when you speak.
• GSM 6.10 based Voice Compression:
  The VaxVoice component uses the GSM 6.10 voice compression codec; thereby reducing the required data rate to as low as 1.6Kbytes/Second for a single voice session.

Features:

• H.323 Protocol;
• G7xx Codecs, GSM-06.10 and MS-GSM (Required codec set can be supplied by request);
• Gatekeeper and Enpoint Mode;
• Required bandwidth selection;
• NAT Translation;
• Fast and Slow start;
• H.245 Tunneling;
• User input mode;
• Silence Detection;
• RTP, UDP and TCP Port settings (very useful when firewall is in place);
• H323 and RTP trace support;
• Playback and Recording audio devices support;
• Jitter Delay support;
• Sound channel buffer depth support.

Requires Indy. Prefered ACM codec to use is Speex.
 
Fully functional
Source: Included

• Make and answer phone calls using modems, pbx systems, telephony cards, etc.
• Exclusive audio filter to decode telephone signals such as busy tone, ringback tone, DTMF, etc.
• Play and record on the phone line or sound card
• Encrypt recorded phone calls.
• Voice detection to determine when the phone call was answered.
• FAX
• Wave sound editor included
• Serial port communication
• File Transfer (ZModem)

Native support for ACM, MP3 encoders (such as Lame/Blade), BASS, Ogg/Vorbis libraries and OpenH323 plugins.

Including:

• high performance multi-room conference server;
• efficient DSP library with software multiband EQ and dynamic processors;
• FFT, DTMF and AEC components;
• SHOUTCast, RAW, peer-to-peer, broadcast and multicast streaming support;
• IOCP sockets for optimal scalable performance;
• rich set of samples to experiment with

• ZyXEL U1496
• ZyXEL 2864/2864I
• USR Sportster series
• Motorola SM56
• Cirrus Logic CL-MD1414XXX family
• Rockwell chipset based.