SIP: generate seq_nr within allowed range

Change-Id: Iea5f4568af1bd795db57d2b77e82d976edc9e337
diff --git a/sip/SIP_Tests.ttcn b/sip/SIP_Tests.ttcn
index 9d92b87..ab33af7 100644
--- a/sip/SIP_Tests.ttcn
+++ b/sip/SIP_Tests.ttcn
@@ -101,13 +101,13 @@
 	if (cp.is_mo) {
 		cp.comp.sip_url_ext := valueof(ts_SipAddr(cp.called, mp_local_host, 5060));
 		cp.comp.sip_url_gsm := valueof(ts_SipAddr(cp.calling, mp_osmosip_host, 5060));
-		cp.mncc_call_id := f_rnd_int(429496725);
+		cp.mncc_call_id := f_sip_rand_seq_nr();
 	} else {
 		cp.comp.sip_url_ext := valueof(ts_SipAddr(cp.calling, mp_local_host, 5060));
 		cp.comp.sip_url_gsm := valueof(ts_SipAddr(cp.called, mp_osmosip_host, 5060));
 		cp.comp.sip_call_id := hex2str(f_rnd_hexstring(15));
 	}
-	cp.comp.sip_seq_nr := f_rnd_int(4294967295);
+	cp.comp.sip_seq_nr := f_sip_rand_seq_nr();
 	cp.comp.sip_body := "";
 }