Download Trysoft AddTapi.NET TAPI Components Build

Trysoft AddTapi.NET TAPI Components Build

Trysoft AddTapi.NET TAPI Components Build
Trysoft AddTapi.NET TAPI Components Build

TAPI .NET Telephony Library - easily add telephony features to your C#, VB.NET or C++ application. AddTapi.NET supports Microsoft Telephony Application Programming Interface (TAPI) 1.3 - 3.2 and works with all TAPI-compatible telephony hardware, from voice modems to advanced telephony boards to TAPI-compatible PBX systems.

With AddTapi.NET you can easily add telephony features to your C#, VB.NET or C++ application. AddTapi.NET has everything you need to develop telephony applications such as:

Interactive Voice Response (IVR) Systems
Caller ID Applications
Voice Mail Systems
Phone Dialers
Call Recorders
Notification Systems
Call Tracking Applications
Phone Surveys

AddTapi.NET wraps Microsoft Telephony Application Programming Interface (TAPI) and provides a set of easy-to-use managed classes for developing CTI software. AddTapi.NET supports TAPI 1.3 - 3.2 and works with all TAPI-compatible telephony hardware, from voice modems to advanced telephony boards to TAPI-compatible PBX systems, including:

Dialogic Diva Analog and Digital Boards Cisco Unified Communications Manager Avaya IP Office and Avaya Aura Panasonic KX-TDA and NS NEC UNIVERGE 3Com NBX 100 Siemens HiPath And many others...

Why Choose AddTapi.NET?
Easy to use without any TAPI knowledge or telephony programming experience
With AddTapi.NET you can start adding telephony features to your software without spending weeks studying complex TAPI or proprietary telephony hardware API. Unlike other TAPI controls that provide a simple wrapper for TAPI functions, AddTapi.NET does a lot of work under the hood.

100% .NET managed code
AddTapi.NET was designed for .NET from the ground up. AddTapi.NET is written entirely in C# and does not contain any legacy code. Almost all other TAPI controls use old ActiveX technology. With AddTapi.NET you get convenient classes, events and collections that look like a part of the .NET framework. Plus no more problems with ActiveX registration or incompatible DLL versions. AddTapi.NET just works!

Outstanding support by experienced programmers.
Our company has been developing telephony applications for more than 10 years. Our award-winning PhoneTray software is used by more than 100,000 people worldwide. We are small, dedicated and agile. When you ask us a question you will get an answer directly from developers who designed and built AddTapi.NET. And if you need any new features just contact us and we will implement them for you!

Reliable and stable
AddTapi.NET is stable, reliable and trusted by mutli-national corporations and government agenices. Our customers use AddTapi.NET to build computer telephony applications that run 24/7 and handle tens of thousands phone calls per day. AddTapi.NET is even used to manage 911 emergency response call centers!


Monitor incoming and outgoing calls.
AddTapi.NET monitors incoming and outgoing calls and notifies your application when a new call is received, when a connection to the remote party is established, when a call is disconnected and so on. AddTapi.NET supplies all information needed to develop call monitoring and logging applications.

Answer incoming calls automatically or on request
AddTapi.NET can answer incoming calls automatically after specified number of rings. If you do not need to answer all incoming calls automatically, your application can receive incoming call notifications and decide whether to answer the call or not.

Support multiple lines
AddTapi.NET programming model helps you easily develop scalable applications that work well with any number of lines. You will not believe how easy it is to write multi-line applications with AddTapi.NET until you download the demo version and try it yourself.

Play audio files
AddTapi.NET can play audio files over the phone. AddTapi.NET supports all wave (.wav) files that can be played in Windows, including compressed formats for which the codecs are installed.

Obtain Caller ID and Called ID
AddTapi.NET can obtain caller's name and number on incoming calls. It can also provide called party's name and number if supported by the telephony hardware.

Speak text using TTS (Text-To-Speech) synthesis
AddTapi.NET can "speak" text over the phone using text synthesis. AddTapi.NET supports Microsoft SAPI 5.0 and can use any SAPI-compatible Text-To-Speech engine.

Make outgoing calls
Your application can make outgoing calls using AddTapi.NET. AddTapi.NET detects when a call is answered and reports if there was no answer or the number was busy.

Detect and send DTMF digits
AddTapi.NET can detect DTMF digits on the line allowing you implement touch-tone menus. AddTapi.NET makes it easy to gather a string of digits such as a pin code or an account number. With AddTapi.NET your application can generate DTMF digits to control a PBX or navigate a touch-tone menu.

Record call audio
AddTapi.NET can record audio from phone line to a wave (.wav) file. Other telephony operations such as DTMF detection can be performed while recording is in progress.

Transfer calls
AddTapi.NET can transfer calls to another extension or another number if this feature is supported by your telephony hardware.

Put calls on hold
AddTapi.NET can put calls on hold and retrieve held calls. While the call is on hold the application can use the line to make or answer other calls.

Establish and control conference calls
With AddTapi.NET your application can establish conference calls with 3 or more parties, add additional parties to a conference call and remove participants from a conference call.

Park and unpark calls
AddTapi.NET can park a call and unpark a call parked at the specified extension if this feature is supported by your telephony hardware.

Supports call forwarding
AddTapi.NET can obtain call forwarding information and configure call forwarding for the phone line/extension. Forwarding information describes when incoming calls are forwarded and the destination number(s) for call forwarding.

Detect telephony devices added/removed at runtime
AddTapi.NET detects when a new telephony device is connected or becomes available, allowing your application to work with the device right away without restarting the application. Your application is also notified when a device is removed from the system or becomes unavailable.

Use device-specific features
Many telephony systems provide access to device-specific features using TAPI extensions. With AddTapi.NET you have access to all device-specific functionality provided by the telephony system manufacturer.

AddTapi.NET 5.2 has been released
We just released version 5.2 of our computer telephony library AddTapi.NET. The demo version is available for download from To upgrade the purchased version of AddTapi.NET please send your serial number to Here is a list of new features in AddTapi.NET 5.2:

Call data support

The call data field is used to provide additional information related to a call in TAPI. Some systems, for example Avaya Voicemail Pro, use this field to pass additional information to TAPI applications monitoring the calls. New TapiCall.CallData property gives the application access to the call data. The CallData flag has been added to the TapiCallInfoState enumeration. AddTapi.NET fires the TapiApp.CallInfo event with this flag set when the call data becomes available or changes.

Special Information Tone (SIT) detection

Special information tones such as Reorder, Intercept or No Circuit indicate that an outgoing call has failed. AddTapi.NET 5.2 can detect and report special information tones to the application when running on telephony hardware with SIT detection capabilities such as Way2Call Hi-Phone. When a SIT is detected the call transitions to the SpecialInfo state and then disconnects. AddTapi sets the TapiCall.DisconnectMode property based on the type of SIT that was detected.

Call duration

New version adds TapiCall.CallDuration property that contains duration of the call. Call duration is calculated from the moment the call transitions to the Connected state.

Improved call state processing

In previous versions of AddTapi.NET the application could miss a call state transition if TapiApp.CallState events were firing quickly one after another. Version 5.2 processes call state messages from TAPI more efficiently and ensures that the TapiCall.State reported to the application in the TapiApp.CallState event handler matches call state in the corresponding TAPI message.

Other small fixes and improvements

– Added TapiAddress.AddressFeatures property that describes the operations that can be invoked on the address.

– Added CallID and RelatedCallID flags to the TapiCallInfoState enumeration. These flags indicate that the TapiCall.CallID or TapiCall.RelatedCallID property has changed in the TapiApp.CallInfo event.

– Fixed: Some incoming calls where reported as outgoing on HiPath TAPI 170.

– Fixed: Non-directed TapiCall.Park(String) could time out on some systems.