I guess I have a little confusion here between inbound esl and outbound esl.

My Goal: What I am trying to do is detect if the call is being transferred and notify the caller about it.

1- I have an application based on SIP.js client that makes outbound calls via a registered SIP trunk on my Freeswitch box. I upload a list of phone numbers to call and hit Launch button.

2- Some calls can be transferred by the callee endpoint. I want to detect this fact.

3- According to my research, I can do this using Event Socket library.

4- To detect if there is a transfer, I can control the channel variable RDNIS or TRANSFER_TIME. If there is a transfer these variables are not empty.

5- Once I detect there is a transfer I want to send a NOTIFY packet to the client.

I don't know whether to use an Outbound socket connection or an Inbound Connection.

I tried to do this with outbound connection as follows:

I have a perl server listening on port 8084/tcp.

In this perl script I subscribe for CHANNEL_ANSWER Events and I filter by the call uuid.

The problem is when I call the socket connection, the bridge application never executes.

How am I supposed to listen for a specific event and make a bridge call?

Is what I am doing wrong. Please correct me.