For testing we can use Trickle-Ice testing tool. Go to trickle-ice page https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/ and enter following details.

```
STUN or TURN URI: turn:__DOMAIN__:__PORT_TURNSERVER_TLS__
TURN username:    turnserver
TURN password:    __TURNSERVER_PWD__
```