User fails to respond to a testrequest and sends no messages 

Same but in the opposite direction. 

Client FH logout.

User sends initiates a transaction after either sending/ receiving a logout. 

Illustrate multiple logon attempts to venue - 5 attempts, one minute interval, then logout to client. Eg Consider Reuters MAPI.

Illustrate what happens when Venue or Client connection is dropped.

Illustrate EOD session/seq num resets.

Multiplexing - if we have multuiple users connecting to single venue, and first user triggers logon, last user triggers logout, how de we support first user logout cleanly - eg their order cancellations that they need to be notified of...

user sends initiates a transaction after after receiving a loggedout user notification