Actionscript 3.0 SIP client

I need a SIP client COMPLETELY written in ActionScript, so NO external libraries or other dependencies. It should be able to connect with a SIP server, ACCEPT calls only (so don't worry about dialing and invites) and handle that 2-way phone call (mic/speaker). That's it, nothing specific! If you know what you're doing, you don't need anything else from me, just let me know when you have it done. Then deliver the COMPILED apk and if it's working as described above (We will test against a standard SIP server), we will release the payment immediately. You may have the code laying around somewhere, in that case it's probably only 20 minutes work...