Hi. websockets module has only handshake and close functions for now.
Im asking the way about send function form server but not SIP messages for handling it by callback at the client

for example i a some client who was connected to kamailio and want receive messages from websocket and handle it.

for all events that sends through websocket at kamailio are SIP signallig staff and it created by core as i see.

I what to know if it is possible to send some other messages (frames,events as you want) to subscribers that connected at the websocket.

More closr example
Im a some manager and what to connect to Some web app and see active calls that was made at this web app.
So i as developer set at the kamailio config 

send_from_ws("eventname:data")

so for some call positions i set it and send it into subscribed clients.

THen at the client side i will handle it.

Im understand that kamailio is a SIP server. But if it already have some websocket implementation i just asking it because it will be a cool to manage this staff from one server instead of sharing data at the redis for example? setting subscribing at the redis and then use another server for this staff