Asterisk is Open Source software with which you could turn a normal PC into a VoIP PBX. By the installation of special ISDN cards or analogous adaptors you can also connect ISDN and analogous phones beside SIP-capable phones. Because the installation and configuration of an Asterisk PBX is not easy, some system providers offer preconfigured systems. xtelsio TAPI Driver for Asterisk supports dialing and hanging up and informs your TAPI application about incoming and outgoing calls including the caller and called ID, and this for multiple lines of one or several Asterisk systems. You can initiate calls directly from within Microsoft Outlook®, ACT® or any other TAPI application. For snom phones, you can activate a direct control mode - this allows to initiate calls in hands-free mode and to accept incoming calls. Optionally Supported Functions: * Consultation (TSPI_lineSetupTransfer) * Transfer and conference (TSPI_lineCompleteTransfer) * Hold (TSPI_lineHold) Tag: