Below is a copy of the log output on my expressway.
tvcs: Event="call rejected" service="sip" src-ip="xxx.xxx.78.22" src-port="5060" src-alias-type="sip" src-alias="sip:be-shape-ndw-vtc-eng-3@xxx.xxx.82.1" dst-alias-type="sip" dst-alias="sip:9513014239700@xxx.xxx.27.31;transprt\=tcp"call-serial-number="9c90aeca-dd47-11e2-89b1-0010f325dddc" tag="9c90b078-dd47-11e2-a308-0010f325dddc"detail="loop detected" protocol="tcp" response-code="482" level="1" utctime="2013-06-25 03:30:41,376"