diff --git a/config.sample.json b/config.sample.json
index c0f1efc..5e42ad0 100644
--- a/config.sample.json
+++ b/config.sample.json
@@ -8,8 +8,4 @@
     "greeting_prefix": "",
     "evo_url": "",
     "smsc": "",
-    "send_ping_to_evo": 0,
-    "ping_pin": "",
-    "ping_from": "",
-
 }
diff --git a/evo-im.js b/evo-im.js
index 2a9b8d2..affe90b 100644
--- a/evo-im.js
+++ b/evo-im.js
@@ -62,42 +62,12 @@ function onMessage(sender, message, ts, sendMessage) {
             }
         });
     });
-
-    // kirim ping 1 detik setelah pesan agar segera diproses
-    if (config.send_ping_to_evo == '1') {
-        setTimeout(function() {
-
-            var pingOpts = {
-                url: config.evo_url,
-                qs: {
-                    msg: 'S.' + config.ping_pin,
-                    msisdn: config.ping_from + config.msisdn_suffix,
-                    smsc: config.smsc,
-                    ts: strftime('%F %T')
-                }
-            };
-
-            logger.verbose('Sending ping message', {opts: pingOpts});
-
-            request(pingOpts, function(err, response, body) {
-                if (err) {
-                    logger.warn('Error send PING to evo: ' + err);
-                    return;
-                }
-            });
-        }, 1000);
-    }
 }
 
 function onHttpIncomingMessage(request, response) {
     var qs = url.parse(request.url, true).query;
     logger.verbose("onHttpIncomingMessage()", {qs: qs});
 
-    // abaikan balikan ping
-    if (qs.to == config.ping_from) {
-        return;
-    }
-
     var destination = qs.to.replace(config.msisdn_suffix, '');
     logger.info('Sending message to ' + destination + ': ' + qs.msg);
     sendMessage(destination, qs.msg);