Used to establish a connection between a TT FIX Gateway and a third-party FIX acceptor
From TT FIX Gateways to a third-party FIX acceptor and then from a third-party FIX acceptor to TT FIX Gateways
|Tag #||Field Name||Req’d||Data Type||Comments|
|Component: Standard Header||Y||35=A (MsgType)|
Condition: Will be sent when the TT FIX Gateway initiates a connection. The third-party FIX acceptor need not send this in the response.
Method of encryption
As TT FIX Gateway does not support encrypted logons, you must set the value to 0 (None/Other).
Heartbeat interval (seconds)
Whether to reset the sequence numbers on both sides of the FIX session
Valid values include Y and N (default).
|Component: Standard Trailer||Y|
The Logon (A) message is used by a TT FIX Gateway to begin a new or continue an existing session with a third-party FIX acceptor.
The following data flow illustrates a typical logon sequence between a TT FIX Gateway and a third-party FIX acceptor:
The TT FIX Price Gateway will only support non-persistent FIX sessions. In other words, it will always send a Logon (A) message with Tag 34 (MsgSeqNum)=1 and Tag 141 (ResetSeqNumFlag)=Y when initiating a connection. As a result, the FIX session will terminate when the connection does.
When the TT FIX Order Gateway is started for the first time, it will send a Logon (A) message with Tag 34 (MsgSeqNum)=1. When there are unscheduled restarts, the standard FIX message sequence number negotiation will take place. After scheduled message sequence number resets, the TT FIX Order Gateway will send a Logon (A) message with Tag 34 (MsgSeqNum)=1.