*** chan_misdn.c.orig	Sat Jan 16 17:56:53 2010
--- chan_misdn.c	Mon Jan 18 17:04:30 2010
***************
*** 4285,4290 ****
--- 4285,4291 ----
  					ast_log(LOG_WARNING,
  						"Extension '%s@%s' can never match. Jumping to 'i' extension. port:%d\n",
  						bc->dad, ch->context, bc->port);
+  					pbx_builtin_setvar_helper(ch->ast, "INVALID_EXTEN", bc->dad);
  					strcpy(ch->ast->exten, "i");
  
  					ch->state = MISDN_DIALING;