--- a/smpp-trx-sa/main.c	Wed Oct 11 21:21:34 2023 -0800
+++ b/smpp-trx-sa/main.c	Wed Oct 11 21:22:32 2023 -0800
@@ -42,9 +42,9 @@
 	fd_set fds;
 	int max_fd, rc;
 
-	if (argc != 6) {
+	if (argc < 6 || argc > 7) {
 		fprintf(stderr,
-	"usage: %s server-ip system-id password log-file socket-pathname\n",
+"usage: %s server-ip system-id password log-file socket-pathname [enq-link]\n",
 			argv[0]);
 		exit(1);
 	}
@@ -69,6 +69,8 @@
 		perror(argv[4]);
 		exit(1);
 	}
+	if (argv[6])
+		log_enquire_link_open(argv[6]);
 	create_local_socket(argv[5]);
 	max_fd = localsock;
 	open_tcp_conn(&server_sin);