Below is a link to a new Osmo-CC documentation (still unfinished)
including osmo-cc-sip-endpoint description. It is now complete for SIP
with all examples I wanted to put in there.
Be sure to install the latest version from GIT (osmo-cc-sip-endpoint),
because I just fixed incoming registration, which I never tested before.
http://download.eversberg.eu/temp/osmo-cc-guide_6.pdf