Register for and method of providing {TAIL ~ contact information} for {HEAD ~ a communications unit} identified by a uniform resource name 
Register for and method of providing { TAIL ~ contact information } for { HEAD ~ a communications unit } identified by a uniform resource name
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH