Adobe and webphone development

Hi! I am a new person here with little experience. I came here with the purpose of asking for help about webphone development. I would like to start building a SIP webphone with Silverlight. But I am not familiar with webphone development and therefore I need to find reliable applications for it. I found a sample program like this on the net: voip-sip-sdk.com/p_83-silverlight-sip-softphone-javascript-voip.html -I added this site just for giving you an example- but haven't heard about it before and I need some further assistance related to its development. Do you provide compatibility with the above sdk and webphone applications?  Thank you for your answer.