diff --git a/src/Registrator.js b/src/Registrator.js
index 0c81537cb..dc1f72695 100644
--- a/src/Registrator.js
+++ b/src/Registrator.js
@@ -36,7 +36,7 @@ JsSIP.Registrator = function(ua, transport) {
 
   // Contact header
   if(reg_id) {
-    this.contact = '<' + this.ua.contact.uri + '>';
+    this.contact = this.ua.contact.toString();
     this.contact += ';reg-id='+ reg_id;
     this.contact += ';+sip.instance="<urn:uuid:'+ this.ua.configuration.instance_id+'>"';
   } else {
diff --git a/src/Session.js b/src/Session.js
index 54ef6e7aa..c67f632dc 100644
--- a/src/Session.js
+++ b/src/Session.js
@@ -59,7 +59,7 @@ JsSIP.Session.prototype.init_incoming = function(request) {
   this.from_tag = request.from_tag;
   this.id = request.call_id + this.from_tag;
   this.request = request;
-  this.contact = '<'+ this.ua.contact +'>';
+  this.contact = this.ua.contact.toString();
 
   //Save the session into the ua sessions collection.
   this.ua.sessions[this.id] = this;
@@ -126,16 +126,17 @@ JsSIP.Session.prototype.connect = function(target, views, options) {
 
   requestParams = {from_tag: this.from_tag};
 
-  if (options.anonymous) {
-    this.contact = '<'+ this.ua.contact.toString(true) +';ob>';
+  this.contact = this.ua.contact.toString({
+    anonymous: this.anonymous,
+    outbound: true
+  });
 
+  if (this.anonymous) {
     requestParams.from_display_name = 'Anonymous';
     requestParams.from_uri = 'sip:anonymous@anonymous.invalid';
 
     extraHeaders.push('P-Preferred-Identity: '+ this.ua.configuration.uri.toString());
     extraHeaders.push('Privacy: id');
-  } else {
-    this.contact = '<'+ this.ua.contact +';ob>';
   }
 
   extraHeaders.push('Contact: '+ this.contact);
diff --git a/src/UA.js b/src/UA.js
index 9a2826bd5..5c2128d80 100644
--- a/src/UA.js
+++ b/src/UA.js
@@ -715,14 +715,26 @@ JsSIP.UA.prototype.loadConfig = function(configuration) {
     pub_gruu: null,
     temp_gruu: null,
     uri: new JsSIP.URI('sip', JsSIP.Utils.createRandomToken(8), settings.via_host, null, {transport: 'ws'}),
-    toString: function(anonymous){
-      var contact;
+    toString: function(options){
+      options = options || {};
+
+      var
+        anonymous = options.anonymous || null,
+        outbound = options.outbound || null,
+        contact = '<';
 
       if (anonymous) {
-        contact = this.temp_gruu || 'sip:anonymous@anonymous.invalid;transport=ws';
+        contact += this.temp_gruu || 'sip:anonymous@anonymous.invalid;transport=ws';
       } else {
-        contact = this.pub_gruu || this.uri.toString();
+        contact += this.pub_gruu || this.uri.toString();
+      }
+
+      if (outbound) {
+        contact += ';ob';
       }
+
+      contact += '>';
+
       return contact;
     }
   };