libosip2-dev

Package contains libraries, required by other applications as dependencies. Do not install separately.

development files for the SIP library
libosip2 header files and static libraries to assist in development of
programs wishing to use SIP.
.
The oSIP library is written in C, is thread safe and has no dependencies
except the standard C library.
.
oSIP could be used to implement an IP soft-phone as well as embedded SIP
software. oSIP is not limited to endpoint agents implementations and can
also be used to implement SIP proxies or registration services.
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oSIP currently provides an API for the SIP message parser, SDP message
parser, and library to handle "SIP transactions" as defined by the SIP
standards (RFC3261).