```
public interface NoPrackReceived
```
This event is fired on a SipSession activity when no PRACK has been received after a reliable provisional response (sent using OutgoingSipResponse.sendReliably() has been retransmitted for 32 seconds. The SBB receiving this event should terminate the transaction by sending a 500 Server Error response to the initial INVITE request.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`OutgoingSipResponse`	`getProvisionalResponse()`	Get the unacknowledged provisional response.
`IncomingSipRequest`	`getRequest()`	Get the INVITE request that started the transaction.

Interface NoPrackReceived