diff --git a/libs/sofia-sip/libsofia-sip-ua/nta/nta.c b/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
index 6e6ec1b5de..37b0922c7a 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nta/nta.c
@@ -2053,8 +2053,8 @@ const sipdns_tports[SIPDNS_TRANSPORTS] = {
   { "tcp",  "5060", "_sip._tcp.",  "SIP+D2T"  },
   { "sctp", "5060", "_sip._sctp.", "SIP+D2S"  },
   { "tls",  "5061", "_sips._tcp.", "SIPS+D2T" },
-  { "ws",   "5066",   "_sips._ws.",  "SIP+D2W"  },
-  { "wss",  "5067",  "_sips._wss.", "SIPS+D2W" },
+  { "ws",   "5080",   "_sips._ws.",  "SIP+D2W"  },
+  { "wss",  "5081",  "_sips._wss.", "SIPS+D2W" },
 };
 
 static char const * const tports_sip[] =
diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c b/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c
index c63455fc91..8ff2684881 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/nua_params.c
@@ -1248,6 +1248,14 @@ int nua_handle_save_tags(nua_handle_t *nh, tagi_t *tags)
     else if (t->t_tag == nutag_sips_url) {
       url = (url_string_t *)t->t_value;
     }
+    /* NUTAG_WS_URL_REF(url) */
+    else if (t->t_tag == nutag_ws_url) {
+      url = (url_string_t *)t->t_value;
+    }
+    /* NUTAG_WSS_URL_REF(url) */
+    else if (t->t_tag == nutag_wss_url) {
+      url = (url_string_t *)t->t_value;
+    }
   }
 
   su_home_auto(tmphome, sizeof tmphome);
@@ -1314,6 +1322,8 @@ static int nua_handle_param_filter(tagi_t const *f, tagi_t const *t)
 
   if (t->t_tag == nutag_url ||
       t->t_tag == nutag_sips_url ||
+      t->t_tag == nutag_ws_url ||
+      t->t_tag == nutag_wss_url ||
       t->t_tag == nutag_identity)
     return 0;
 
diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/nua_register.c b/libs/sofia-sip/libsofia-sip-ua/nua/nua_register.c
index d71c910dca..c28389c0c3 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/nua_register.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/nua_register.c
@@ -1149,12 +1149,16 @@ int
 nua_stack_init_transport(nua_t *nua, tagi_t const *tags)
 {
   url_string_t const *contact1 = NULL, *contact2 = NULL;
+  url_string_t const *contact3 = NULL, *contact4 = NULL;
   char const *name1 = "sip", *name2 = "sip";
+  char const *name3 = "sip", *name4 = "sip";
   char const *certificate_dir = NULL;
 
   tl_gets(tags,
           NUTAG_URL_REF(contact1),
           NUTAG_SIPS_URL_REF(contact2),
+          NUTAG_WS_URL_REF(contact3),
+          NUTAG_WSS_URL_REF(contact4),
           NUTAG_CERTIFICATE_DIR_REF(certificate_dir),
           TAG_END());
 
@@ -1173,6 +1177,18 @@ nua_stack_init_transport(nua_t *nua, tagi_t const *tags)
        : contact2->us_url->url_type == url_sips))
     name2 = "sips";
 
+  if (contact3 &&
+      (url_is_string(contact3)
+       ? su_casenmatch(contact3->us_str, "sips:", 5)
+       : contact3->us_url->url_type == url_sips))
+    name3 = "sips";
+
+  if (contact4 &&
+      (url_is_string(contact4)
+       ? su_casenmatch(contact4->us_str, "sips:", 5)
+       : contact4->us_url->url_type == url_sips))
+    name4 = "sips";
+
   if (!contact1 /* && !contact2 */) {
     if (nta_agent_add_tport(nua->nua_nta, NULL,
 			    TPTAG_IDENT("sip"),
@@ -1207,6 +1223,20 @@ nua_stack_init_transport(nua_t *nua, tagi_t const *tags)
 			    TPTAG_CERTIFICATE(certificate_dir),
 			    TAG_NEXT(nua->nua_args)) < 0)
       return -1;
+
+    if (contact3 &&
+	nta_agent_add_tport(nua->nua_nta, contact3,
+			    TPTAG_IDENT(name3),
+			    TPTAG_CERTIFICATE(certificate_dir),
+			    TAG_NEXT(nua->nua_args)) < 0)
+      return -1;
+
+    if (contact4 &&
+	nta_agent_add_tport(nua->nua_nta, contact4,
+			    TPTAG_IDENT(name4),
+			    TPTAG_CERTIFICATE(certificate_dir),
+			    TAG_NEXT(nua->nua_args)) < 0)
+      return -1;
   }
 
 
diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/nua_tag.c b/libs/sofia-sip/libsofia-sip-ua/nua/nua_tag.c
index 9e0c8d85ca..7670b93268 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/nua_tag.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/nua_tag.c
@@ -1621,6 +1621,55 @@ tag_typedef_t nutag_sips_url = URLTAG_TYPEDEF(sips_url);
  * Reference tag for NUTAG_SIPS_URL().
  */
 
+/**@def NUTAG_WS_URL(x)
+ *
+ * Local WS url.
+ *
+ * The application can specify an alternative local address for
+ * NUA user agent engine. Usually the alternative address is a
+ *  SIP URI (WS) used with websocket transport.
+ *
+ * @par Used with
+ *    nua_create()
+ *
+ * @par Parameter type
+ *    char const *
+ *
+ * @par Values
+ *
+ * Corresponding tag taking reference parameter is NUTAG_WS_URL_REF().
+ */
+tag_typedef_t nutag_ws_url = URLTAG_TYPEDEF(ws_url);
+
+/**@def NUTAG_WS_URL_REF(x)
+ * Reference tag for NUTAG_WS_URL().
+ */
+
+
+/**@def NUTAG_WSS_URL(x)
+ *
+ * Local WSS url.
+ *
+ * The application can specify an alternative local address for
+ * NUA user agent engine. Usually the alternative address is a
+ * secure SIP URI (WSS) used with secure websocket transport.
+ *
+ * @par Used with
+ *    nua_create()
+ *
+ * @par Parameter type
+ *    char const *
+ *
+ * @par Values
+ *
+ * Corresponding tag taking reference parameter is NUTAG_WSS_URL_REF().
+ */
+tag_typedef_t nutag_wss_url = URLTAG_TYPEDEF(wss_url);
+
+/**@def NUTAG_WSS_URL_REF(x)
+ * Reference tag for NUTAG_WSS_URL().
+ */
+
 
 /**@def NUTAG_CERTIFICATE_DIR(x)
  *
diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/sofia-sip/nua_tag.h b/libs/sofia-sip/libsofia-sip-ua/nua/sofia-sip/nua_tag.h
index be909d6911..2c3a72ca04 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/sofia-sip/nua_tag.h
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/sofia-sip/nua_tag.h
@@ -286,6 +286,16 @@ SOFIAPUBVAR tag_typedef_t nutag_sips_url;
 #define NUTAG_SIPS_URL_REF(x)   nutag_sips_url_ref, urltag_url_vr(&(x))
 SOFIAPUBVAR tag_typedef_t nutag_sips_url_ref;
 
+#define NUTAG_WS_URL(x)       nutag_ws_url, urltag_url_v(x)
+SOFIAPUBVAR tag_typedef_t nutag_ws_url;
+#define NUTAG_WS_URL_REF(x)   nutag_ws_url_ref, urltag_url_vr(&(x))
+SOFIAPUBVAR tag_typedef_t nutag_ws_url_ref;
+
+#define NUTAG_WSS_URL(x)       nutag_wss_url, urltag_url_v(x)
+SOFIAPUBVAR tag_typedef_t nutag_wss_url;
+#define NUTAG_WSS_URL_REF(x)   nutag_wss_url_ref, urltag_url_vr(&(x))
+SOFIAPUBVAR tag_typedef_t nutag_wss_url_ref;
+
 #define NUTAG_PROXY(x)          NTATAG_DEFAULT_PROXY(x)
 #define NUTAG_PROXY_REF(x)      NTATAG_DEFAULT_PROXY_REF(x)
 #define nutag_proxy             ntatag_default_proxy