diff --git a/assets/js/components/calls/controller.js b/assets/js/components/calls/controller.js
new file mode 100644
index 00000000..06b4ec5f
--- /dev/null
+++ b/assets/js/components/calls/controller.js
@@ -0,0 +1,18 @@
+/**
+ * Calls controller
+ * 
+ * @author Pierre Hubert
+ */
+
+class CallsController {
+
+	/**
+	 * Open a call for a conversation
+	 * 
+	 * @param {Conversation} conv Information about the target conversation
+	 */
+	static Open(conv) {
+		alert("Open call for conversation " + conv.ID);
+	}
+
+}
\ No newline at end of file
diff --git a/assets/js/components/conversations/chatWindows.js b/assets/js/components/conversations/chatWindows.js
index c0af34ea..70cd9605 100644
--- a/assets/js/components/conversations/chatWindows.js
+++ b/assets/js/components/conversations/chatWindows.js
@@ -585,11 +585,11 @@ const ConvChatWindow = {
 	showCallButton: function(conversation){
 
 		//Check if calls are disabled
-		if(/*TODO : implement */false)
+		if(!conversation.infos.can_have_call)
 			return;
 
 		//Add the call button
-		var button = createElem2({
+		const button = createElem2({
 			insertBefore: conversation.box.boxTools.firstChild,
 			type: "button",
 			class: "btn btn-box-tool",
@@ -598,7 +598,7 @@ const ConvChatWindow = {
 		conversation.box.callButton = button;
 
 		button.addEventListener("click", function(){
-			// TODO : implement
+			CallsController.Open(conversation.infos)
 		});
 	},
 
diff --git a/system/config/dev.config.php b/system/config/dev.config.php
index 313b98fd..2463d16b 100644
--- a/system/config/dev.config.php
+++ b/system/config/dev.config.php
@@ -456,7 +456,7 @@ class Dev {
 			"js/components/incognito/keyboard.js",
 
 			//Calls component
-
+			"js/components/calls/controller.js",
 
 			// Web app component
 			"js/components/webApp/interface.js",