Index: main/autoservice.c
===================================================================
--- main/autoservice.c	(revision 91598)
+++ main/autoservice.c	(working copy)
@@ -90,8 +90,11 @@
 		if (chan) {
 			struct ast_frame *f = ast_read(chan);
 	
-			if (!f)
+			if (!f) {
+				/* We got a NULL frame. Assume this means a hangup */
+				ast_queue_hangup(chan);
 				continue;
+			}
 			
 			/* Do not add a default entry in this switch statement.  Each new
 			 * frame type should be addressed directly as to whether it should