I need a SIP Proxy able to act as server for n.1 SIP account and as client for [url removed, login to view] SIP account.
The software must allows the user to choose which account to answer, put on hold another one.
[url removed, login to view] requirements notice: As originally posted, this bid request does not have complete details. Should a dispute arise and this project go into arbitration "as is", the contract's vagueness might cause it to be interpreted against you, even though you were acting in good-faith. So for your protection, if you are interested in this project, please work-out and document the requirements onsite.
The programmer is free to decide if to use a SIP library like the sofia sip library or to develope own SIP functions.
If the programmer decide to develope own SIP function, he can just setup communication via UDP.
Anyway I can provide detailed support for SIP protocol and for general development.