Index: channels/chan_zap.c
===================================================================
--- channels/chan_zap.c	(revision 334)
+++ channels/chan_zap.c	(working copy)
@@ -2029,6 +2029,8 @@
 		int prilocaldialplan;
 		int ldp_strip;
 		int exclusive;
+		const char *rr_str;
+		int redirect_reason;
 
 		c = strchr(dest, '/');
 		if (c)
@@ -2135,8 +2137,26 @@
 		}
 		pri_sr_set_caller(sr, l ? (l + ldp_strip) : NULL, n, prilocaldialplan,
 				  p->use_callingpres ? ast->cid.cid_pres : (l ? PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN : PRES_NUMBER_NOT_AVAILABLE));
-		pri_sr_set_redirecting(sr, ast->cid.cid_rdnis, p->pri->localdialplan - 1, PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN, PRI_REDIR_UNCONDITIONAL);
+		redirect_reason = PRI_REDIR_UNCONDITIONAL;
+		if ((rr_str = pbx_builtin_getvar_helper(ast, "PRIREDIRECTREASON"))) {
+			if (!strcasecmp(rr_str, "UNKNOWN"))
+				redirect_reason = PRI_REDIR_UNKNOWN;
+			else if (!strcasecmp(rr_str, "BUSY"))
+				redirect_reason = PRI_REDIR_FORWARD_ON_BUSY;
+			else if (!strcasecmp(rr_str, "NO_REPLY"))
+				redirect_reason = PRI_REDIR_FORWARD_ON_NO_REPLY;
+			else if (!strcasecmp(rr_str, "DEFLECTION"))
+				redirect_reason = PRI_REDIR_DEFLECTION;
+			else if (!strcasecmp(rr_str, "DTE_OUT_OF_ORDER"))
+				redirect_reason = PRI_REDIR_DTE_OUT_OF_ORDER;
+			else if (!strcasecmp(rr_str, "FORWARDED_BY_DTE"))
+				redirect_reason = PRI_REDIR_FORWARDED_BY_DTE;
+			ast_log(LOG_WARNING, "DEBUG: PRIREDIRECTREASON is set to '%s'\n", rr_str);
+		} else 
+			ast_log(LOG_WARNING, "DEBUG: PRIREDIRECTREASON is not set\n");
 
+		pri_sr_set_redirecting(sr, ast->cid.cid_rdnis, p->pri->localdialplan - 1, PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN, redirect_reason);
+
 #ifdef SUPPORT_USERUSER
 		/* User-user info */
 		useruser = pbx_builtin_getvar_helper(p->owner, "USERUSERINFO");