The call processing subsystem provides the core to all sipX end points
or user agents (e.g. sipXphone and sipXvxml. The sipXcallLib library
contains technologies related to call processing:

* cp - An abstracted Call Processing model

* ptapi - A C++ version of JTAPI call model

* ps - An abstraction for virtual (or physical) phone set objects
(e.g. lamps, hookswitch)

* tao - A transport layer designed to decouple (and remote) the
application layer from call processing.

This package contains the neccessary header files and static libraries
helpful to build projects from the sipX library