--- asterisk-issue8824-2009-01-29/channels/chan_dahdi.c	2009-09-09 15:24:04.000000000 +0200
+++ asterisk-issue8824-2009-01-29.new/channels/chan_dahdi.c	2009-09-10 14:46:55.000000000 +0200
@@ -13325,7 +13325,7 @@
 									else if (pri->pvts[chanpos]->owner) {
 										/* Queue a BUSY instead of a hangup if our cause is appropriate */
 										pri->pvts[chanpos]->owner->hangupcause = e->hangup.cause;
-										if (pri->pvts[chanpos]->owner->_state == AST_STATE_UP)
+										if (pri->pvts[chanpos]->owner->_state == AST_STATE_UP || pri->pvts[chanpos]->owner->_state == AST_STATE_BUSY)
 											pri->pvts[chanpos]->owner->_softhangup |= AST_SOFTHANGUP_DEV;
 										else {
 											switch (e->hangup.cause) {
@@ -13411,7 +13411,7 @@
 							pri_hangup_all(pri->pvts[chanpos]->realcall, pri);
 						else if (pri->pvts[chanpos]->owner) {
 							pri->pvts[chanpos]->owner->hangupcause = e->hangup.cause;
-							if (pri->pvts[chanpos]->owner->_state == AST_STATE_UP)
+							if (pri->pvts[chanpos]->owner->_state == AST_STATE_UP || pri->pvts[chanpos]->owner->_state == AST_STATE_BUSY)
 								pri->pvts[chanpos]->owner->_softhangup |= AST_SOFTHANGUP_DEV;
 							else {
 								switch (e->hangup.cause) {