--- a/sip-manual-out/main.c	Tue Sep 20 10:58:32 2022 -0800
+++ b/sip-manual-out/main.c	Tue Sep 20 12:02:21 2022 -0800
@@ -76,7 +76,8 @@
 	sip_dest_sin.sin_family = AF_INET;
 	sip_dest_sin.sin_addr = sip_dest_ip;
 	sip_dest_sin.sin_port = htons(sip_dest_port);
-	sprintf(from_uri, "sip:%s@%s", argv[2], inet_ntoa(sip_bind_ip));
+	sprintf(from_uri, "<sip:%s@%s>;tag=out%u", argv[2],
+		inet_ntoa(sip_bind_ip), ntohs(dummy_rtp_endp.sin_port));
 	sprintf(to_uri, "sip:%s@%s", argv[3], sip_dest_domain);
 	if (argv[4]) {
 		rc = open_sip_log_file(argv[4]);