iSoftswitch is Linux based VoIP Switch. We offer a complete Voice over IP switching and billing solution. iSoftswitch enables you to provide a comprehensive VoIP calling service using SIP, by providing robust call switching capabilities to your carriers’ facilities, with real-time call failure overflow. iSoftswitch can be the back-end switching and billing system for your wholesale termination,Reseller service or consumer VoIP offering. All types of end points like Linksys PAP2, PC2Phone, Mobile Dialer, Nokia SIP Settings and IP phones can be registered in the iSoftswitch.