diff --git a/app.js b/app.js
index b3e6346..5f21e8b 100644
--- a/app.js
+++ b/app.js
@@ -238,6 +238,7 @@ peers.on('connection', async socket => {
 
 const createWebRtcTransportLayer = async (callId, callback) => {
   try {
+    console.log('[createWebRtcTransportLayer] callId', callId);
     // https://mediasoup.org/documentation/v3/mediasoup/api/#WebRtcTransportOptions
     const webRtcTransport_options = {
       listenIps: [
@@ -250,6 +251,8 @@ const createWebRtcTransportLayer = async (callId, callback) => {
       enableTcp: true,
       preferUdp: true,
     }
+
+    console.log('webRtcTransport_options', webRtcTransport_options);
     
     // https://mediasoup.org/documentation/v3/mediasoup/api/#router-createWebRtcTransport
     let transport = await router[callId].createWebRtcTransport(webRtcTransport_options)
@@ -279,6 +282,7 @@ const createWebRtcTransportLayer = async (callId, callback) => {
     return transport
 
   } catch (error) {
+    console.log('[createWebRtcTransportLayer] ERROR', JSON.stringify(error));
     callback({
       params: {
         error: error