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Let us first know what is the VoIP SIP SDK is all about, the SDK stands for Software Developer Kit which means that this is the kit that contains all the tools and methods that you may need to set up a dial and receive soft phone to your application. It is a powerful kit that contains all the features that will turn your soft phone to be like a real one, except that you are paying much less money.

The first added feature, which was added in the 1.1 VER, is to play an audio file while the conversation is taking place. This means that you can let your client listen to an audio file before you continue talking to him. Not only that but you will also get an alert when the playing is finished so, there won’t be a pause but you will pick up the conversation after the audio playing is finished. The supported file type is WAV which is the best for internet usage because of its small size.

Quick facts:

Dynamically loadable codecs

Registrar support

Play wav files into conversation

Record conversation into file

Hold/Retrieve call

Forward Call (Blind Call Transfer)

Transfer Call (Attended Transfer)

Mute Sound

VPN support

Authorization Id

Noise reduction

Auto gain

Jitter buffer parameters

Samples on Delphi, C#, VB, VB.NET, C++ 2005, C++ 6.0, HTML (SIP ActiveX)

Windowless samples on C++ and .NET

DTMF

Adaptive silence detection

Adaptive jitter buffer

STUN support

Comes as ActiveX control

Royalty free licensing

No Yearly/Monthly fee

IM interface

Codec disabling

Playback of different formats of WAV files

Software volume control

Available codecs:

G.711-ALaw

G.711-uLaw

G.726 (16k 24k 32k 40k)

G.729

G.729A

iLBC

LPC-10

Speex (Narrow, Wide)

g723.1

For more information about VoIP SDK and SIP SDK please visit us.