Index: channels/chan_sip.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_sip.c,v
retrieving revision 1.862
diff -u -r1.862 chan_sip.c
--- channels/chan_sip.c	25 Sep 2005 21:21:47 -0000	1.862
+++ channels/chan_sip.c	26 Sep 2005 02:50:53 -0000
@@ -9493,12 +9493,16 @@
 					ast_log(LOG_DEBUG, "Hairpin detected, setting up call forward for what it's worth\n");
 					if (p->owner)
 						snprintf(p->owner->call_forward, sizeof(p->owner->call_forward), "Local/%s@%s", p->username, p->context);
+					break;
 					/* Fall through */
+				case 480: /* Temporarily Unavailable */
 				case 486: /* Busy here */
-				case 488: /* Not acceptable here - codec error */
 				case 600: /* Busy everywhere */
 				case 603: /* Decline */
-				case 480: /* Temporarily Unavailable */
+					if (owner)
+						ast_queue_control(p->owner, AST_CONTROL_BUSY);
+					break;
+				case 488: /* Not acceptable here - codec error */
 				case 404: /* Not Found */
 				case 410: /* Gone */
 				case 400: /* Bad Request */