... tone, DTMF, FSK Adjustable line gain PCI/PCI-E analog card for Freeswitch and Asterisksupport 4 to 16 ... , Voice Mail Services6, Call Centers7, Prepaid Calling Card System8, Callback Service9, Traditional Calls/VoIP Calls Conference ... Hardware and software requirements: 1, Interface: PCI 2.22, CPU 800+MHZ3, RAM 128+MB4 ... or 2.6.xSize and Weight5, Size(L*W*H): 140*104*12MM6, Weight: 152g The ...