Windows Softphone Development

Hi All

We are currently wanting to develop a Windows Softphone or modify a current softphone to our needs… Does anybody know where I can get my hands on some source code of a Windows Softphone… I have searched the wiki and read through alot of sip information and sites… But does anybody have any more detailed information on actually developing a softphone and where you would start and how you would get the audio codecs etc to work…

Any information would be greatly appreciated…



There are many SDKs available to work with like eyeP Media and VAXVoip but you have to pay for them, if you want a free one then you have the option of RTC Client API but I think RTC Client API isnt very good but worth a try

hope it helps