I need you to develop some software for me. I would like this software to be developed for Windows using .NET. Sample C# Project to :1. Connect to SIP trunk2. Make a call : play a file when pickup , hangup after playing , run event when hangup(by system or user) or no answer3. Receive call : play a file , run event when hang-up or no answer (by system or user) * Don't use any SDK or library with commercial license
6 freelancers are bidding on average $1050 for this job
You could use MS Telephony API for this purpose. It is a free distributed control and manage-able from C# .NET and it supports any SIP connection.