Imported from previous forum
There are two sequence series - incoming and outgoing.
In reconnecting to a FIX session initiator sends MsgSeqNum field filled by next expected (outgoing)sequence number. How does the acceptor synchronize (his)incoming sequence number? Sends the acceptor a test request for a new incoming seq. number?
Generaly: Is it posible to receive a test or resend request from acceptor? Must initiator (client) store every app. messages sent to acceptor(server) for posible resend requests?