... Elastix Detecttion of busy tone, DTMF, FSK Adjustable line gain PCI/PCI-E analog card for Freeswitch and Asterisksupport 4 to 16 ... Applications: 1, PBX/IVR Services2, VoIP Services3, VoIP Gateways4, FAX Server, FAX On Demand5, Voice Mail Services6, Call Centers7, Prepaid Calling ... Calls/VoIP Calls Conference Hardware and software requirements: 1, Interface: PCI 2.22, CPU 800+MHZ3, RAM 128+MB4, Linux ...