Index: file.c
===================================================================
--- file.c	(revision 44544)
+++ file.c	(working copy)
@@ -1029,6 +1029,7 @@
 				switch(fr->subclass) {
 				case AST_CONTROL_HANGUP:
 				case AST_CONTROL_BUSY:
+				case AST_CONTROL_CONGESTION:
 					ast_frfree(fr);
 					return -1;
 				case AST_CONTROL_RINGING:
@@ -1097,6 +1098,8 @@
 			case AST_FRAME_CONTROL:
 				switch(fr->subclass) {
 				case AST_CONTROL_HANGUP:
+                                case AST_CONTROL_BUSY:
+                                case AST_CONTROL_CONGESTION:
 					ast_frfree(fr);
 					return -1;
 				case AST_CONTROL_RINGING:
@@ -1166,6 +1169,8 @@
 			case AST_FRAME_CONTROL:
 				switch(fr->subclass) {
 				case AST_CONTROL_HANGUP:
+                                case AST_CONTROL_BUSY:
+                                case AST_CONTROL_CONGESTION:
 					ast_frfree(fr);
 					return -1;
 				case AST_CONTROL_RINGING:
@@ -1231,6 +1236,8 @@
 			case AST_FRAME_CONTROL:
 				switch(fr->subclass) {
 				case AST_CONTROL_HANGUP:
+                                case AST_CONTROL_BUSY:
+                                case AST_CONTROL_CONGESTION:
 					ast_frfree(fr);
 					return -1;
 				case AST_CONTROL_RINGING: