openr2

MFC/R2 call setup library

OpenR2 is a library that implements the MFC/R2 signalling over E1 lines using the Zapata Telephony interface (or DAHDI). The MF R2 tones required for the signaling are generated by code borrowed from the LGPL library SpanDSP written by Steve Underwood, the user has the option to provide a MF interface to use his own MF R2 tone generation and detection so the library will use them when needed, that's why this library does not depend directly on spandsp, libteletone or zaptel for tone generation and detection (depends on zaptel for CAS bits and general media transmission though)