--- a/coffee/contacts.coffee	Wed Apr 20 12:48:06 2016 +0800
+++ b/coffee/contacts.coffee	Thu May 19 11:04:10 2016 +0800
@@ -12,11 +12,11 @@
     @on 'add change:fullname change:nickname change:bjid', ->
       @set('d/handle', @get('fullname') or @get('nickname') or @get('bjid'))
 
-    @on 'add change:type change:presence change:callstate', ->
+    @on 'add change:type change:presence change:callstate change:features', ->
       if @get('type') is 'self' then return @unset('d/actions')
       if @get('presence') is 'subscribe' then return @set('d/actions', ['authorize', 'unauthorize'])
       actions = ['remove']
-      if @get('presence') isnt 'unavailable'
+      if @get('presence') isnt 'unavailable' and Tram.NS.WEBRTC in (@get('features') ? [])
         switch @get 'callstate'
           when 'established'
             actions.push('hang-up')

--- a/js/contacts.js	Wed Apr 20 12:48:06 2016 +0800
+++ b/js/contacts.js	Thu May 19 11:04:10 2016 +0800
@@ -2,6 +2,7 @@
 (function() {
   var extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
     hasProp = {}.hasOwnProperty,
+    indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; },
     bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
 
   Tram.Contact = (function(superClass) {
@@ -27,8 +28,8 @@
       this.on('add change:fullname change:nickname change:bjid', function() {
         return this.set('d/handle', this.get('fullname') || this.get('nickname') || this.get('bjid'));
       });
-      return this.on('add change:type change:presence change:callstate', function() {
-        var actions;
+      return this.on('add change:type change:presence change:callstate change:features', function() {
+        var actions, ref, ref1;
         if (this.get('type') === 'self') {
           return this.unset('d/actions');
         }
@@ -36,7 +37,7 @@
           return this.set('d/actions', ['authorize', 'unauthorize']);
         }
         actions = ['remove'];
-        if (this.get('presence') !== 'unavailable') {
+        if (this.get('presence') !== 'unavailable' && (ref = Tram.NS.WEBRTC, indexOf.call((ref1 = this.get('features')) != null ? ref1 : [], ref) >= 0)) {
           switch (this.get('callstate')) {
             case 'established':
               actions.push('hang-up');

--- a/js/contacts.js.map	Wed Apr 20 12:48:06 2016 +0800
+++ b/js/contacts.js.map	Thu May 19 11:04:10 2016 +0800
@@ -6,5 +6,5 @@
     "coffee/contacts.coffee"
   ],
   "names": [],
-  "mappings": 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 }
\ No newline at end of file