[Freeswitch-users] Functionality for missed calls

Hi, I need one information regarding missed calls. For exp A is talking with B. C is calling B and gets status busy. In this case it possible that B will see on his phone client C as missed calls. Why this future because users do not want second line on there phones as coustumers who are calling tham are saying that thy are not answering the phones:) so, is it possible to get missed call on phone if you are busy? tnx! miha