A procedure that permits an entitled user to be informed about the routing of data for an established connection, identifying the entire route from the origin to the destination. Note: There are two types of call tracing. Permanent call tracing permits tracing of all calls. On-demand call tracing permits tracing, upon request, of a specific call, provided that the called party dials a designated code immediately after the call to be traced is disconnected, i.e., before another call is received or placed.