Index: pbx/pbx_realtime.c
===================================================================
--- pbx/pbx_realtime.c	(revision 118298)
+++ pbx/pbx_realtime.c	(working copy)
@@ -174,6 +174,8 @@
 		char *tmp="";
 		char *app = NULL;
 		struct ast_variable *v;
+		int expr = 0;
+		int expr_start = 0;
 
 		for (v = var; v ; v = v->next) {
 			if (!strcasecmp(v->name, "app"))
@@ -186,12 +188,22 @@
 						if (*v->value == ',') {
 							*ptr++ = '\\';
 							*ptr++ = ',';
-						} else if (*v->value == '|') {
+						} else if (*v->value == '|' && !expr) {
 							*ptr++ = ',';
+						} else if (*v->value == '$') {
+							*ptr++ = *v->value;
 						} else {
 							*ptr++ = *v->value;
 						}
+						if (expr_start && *v->value == '[') {
+							expr++;
+						}
+						if (expr &&  *v->value == ']') {
+							expr--;
+						}
+						expr_start = (*v->value == '$') ? 1 : 0;
 					}
+					*ptr++ = '\0';
 				} else {
 					tmp = ast_strdupa(v->value);
 				}