Index: channels/chan_dahdi.c
===================================================================
--- channels/chan_dahdi.c	(revision 282537)
+++ channels/chan_dahdi.c	(working copy)
@@ -7372,7 +7372,7 @@
 			ast_debug(1,"Received AST_CONTROL_PROGRESS on %s\n",chan->name);
 #ifdef HAVE_PRI
 			p->digital = 0;	/* Digital-only calls isn't allows any inband progress messages */
-			if (!p->progress && ((p->sig == SIG_PRI) || (p->sig == SIG_BRI) || (p->sig == SIG_BRI_PTMP))
+			if (!p->progress && !p->alerting && ((p->sig == SIG_PRI) || (p->sig == SIG_BRI) || (p->sig == SIG_BRI_PTMP))
 					&& p->pri && !p->outgoing) {
 				if (p->pri->pri) {
 					if (!pri_grab(p, p->pri)) {