diff --git a/apps/app_dial.c b/apps/app_dial.c
index d13dfd9f1e99e0e84614a5ac734693fb4c641c6c..9f0550e3c790b47b3899db74cf1dcdce28bfa5b2 100755
--- a/apps/app_dial.c
+++ b/apps/app_dial.c
@@ -229,6 +229,7 @@ static struct ast_channel *wait_for_answer(struct ast_channel *in, struct localu
 						case AST_CONTROL_BUSY:
 							if (option_verbose > 2)
 								ast_verbose( VERBOSE_PREFIX_3 "%s is busy\n", o->chan->name);
+							in->hangupcause = o->chan->hangupcause;
 							ast_hangup(o->chan);
 							o->chan = NULL;
 							o->stillgoing = 0;
@@ -239,6 +240,7 @@ static struct ast_channel *wait_for_answer(struct ast_channel *in, struct localu
 						case AST_CONTROL_CONGESTION:
 							if (option_verbose > 2)
 								ast_verbose( VERBOSE_PREFIX_3 "%s is circuit-busy\n", o->chan->name);
+							in->hangupcause = o->chan->hangupcause;
 							ast_hangup(o->chan);
 							o->chan = NULL;
 							o->stillgoing = 0;
@@ -282,6 +284,7 @@ static struct ast_channel *wait_for_answer(struct ast_channel *in, struct localu
 					}
 					ast_frfree(f);
 				} else {
+					in->hangupcause = o->chan->hangupcause;
 					ast_hangup(o->chan);
 					o->chan = NULL;
 					o->stillgoing = 0;
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 03df2dda6bdd43b3111f6b36aae4f5a8b9d283d5..1921a0e6486483d9e77a28ec832e8ac9d5d74a47 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -38,6 +38,7 @@
 #include <asterisk/acl.h>
 #include <asterisk/srv.h>
 #include <asterisk/astdb.h>
+#include <asterisk/causes.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <net/if.h>
@@ -4426,6 +4427,19 @@ static void parse_moved_contact(struct sip_pvt *p, struct sip_request *req)
 		strncpy(p->owner->call_forward, s, sizeof(p->owner->call_forward) - 1);
 }
 
+static int hangup_sip2cause(int cause)
+{
+	switch(cause)
+	{
+		case 486:
+			return AST_CAUSE_BUSY;
+		default:
+			return AST_CAUSE_NORMAL;
+	}
+	/* Never reached */
+	return 0;
+}
+
 static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_request *req)
 {
 	char *to;
@@ -4442,6 +4456,8 @@ static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_
 	msg = strchr(c, ' ');
 	if (!msg) msg = ""; else msg++;
 	owner = p->owner;
+	if (owner) 
+		owner->hangupcause = hangup_sip2cause(resp);
 	/* Acknowledge whatever it is destined for */
 	if ((resp >= 100) && (resp <= 199))
 		__sip_semi_ack(p, seqno, 0);
diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index ac95152384d09d15a3af50c86df6faba5c026ecb..4d47aee7a333ccfb61e28671f4f1ecbd0dd297e4 100755
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -503,16 +503,15 @@ static int cidrings[] = {
 #define CANBUSYDETECT(p) (ISTRUNK(p) || (p->sig & (SIG_EM | SIG_SF)) /* || (p->sig & __ZT_SIG_FXO) */)
 #define CANPROGRESSDETECT(p) (ISTRUNK(p) || (p->sig & (SIG_EM | SIG_SF)) /* || (p->sig & __ZT_SIG_FXO) */)
 
+#ifdef ZAPATA_PRI
 /* translate between PRI causes and asterisk's */
 static int hangup_pri2cause(int cause)
 {
 	switch(cause) {
-#ifdef ZAPATA_PRI
 		case PRI_CAUSE_USER_BUSY:
 			return AST_CAUSE_BUSY;
 		case PRI_CAUSE_NORMAL_CLEARING:
 			return AST_CAUSE_NORMAL;
-#endif
 		default:
 			return AST_CAUSE_FAILURE;
 	}
@@ -520,6 +519,21 @@ static int hangup_pri2cause(int cause)
 	return 0;
 }
 
+/* translate between ast cause and PRI */
+static int hangup_cause2pri(int cause)
+{
+	switch(cause) {
+		case AST_CAUSE_BUSY:
+			return PRI_CAUSE_USER_BUSY;
+		case AST_CAUSE_NORMAL:
+		default:
+			return PRI_CAUSE_NORMAL_CLEARING;
+	}
+	/* never reached */
+	return 0;
+}
+#endif
+
 static int zt_get_index(struct ast_channel *ast, struct zt_pvt *p, int nullok)
 {
 	int res;
@@ -1753,7 +1767,7 @@ static int zt_hangup(struct ast_channel *ast)
 						p->call = NULL;
 					} else {
 						p->alreadyhungup = 1;
-						pri_hangup(p->pri->pri, p->call, -1);
+						pri_hangup(p->pri->pri, p->call, ast->hangupcause ? hangup_cause2pri(ast->hangupcause) : -1);
 					}
 #endif
 					if (res < 0)