This package contains the the headers and a static version of the OPAL library. . The OPAL project aims to create a full featured, interoperable, Open Source implementation of the H.323 and SIP protocols that can be used freely by everybody. These protocols are most used for Voice over IP (VoIP) conferencing. . The static library comes in all three flavours: libopal_s.a - notrace opt version libopal_r_s.a - ptrace-enabled opt version libopal_d_s.a - ptrace-enabled debug version