3.1.5.1.2 Packet Pair Session
At this point, the message received has been correlated back to a Packet Pair Session object.
The Per-Packet Pair Handshake Response timer MUST be reset.
The End Time field MUST be set to the current system time plus 1500 milliseconds.
The Next Send Time field MUST be set to 0.
Finally, the Per-Packet Pair Session Resend timer MUST be enabled and set to fire immediately.