[Kamailio-Users] opening 2 and more channels on 1 SIP account

Hi! I am new to opensips, and I am looking for a powerfull sip gateway sollution, because asterisk isn't able to handle such thing. My case: I have a Grandstream VoIP Device, at which a DECT base with 2 cordless phones are connected at 1 FX1 Port. If a call is placed and made through one cordless phone the other cordless phone appears as busy. What I want: I want to place and receive as many calls at the same time through 1 1 FXS Port with one single SIP Account, and through this where the base station is connected through. Question: Does kamilio have the ability for such things?! For any help and advise I would thank you kindly Tamer