Identifies beginning of new message and protocol version.
Message length, in bytes, forward to the CheckSum field.
Defines message type.
Assigned value used to identify firm sending message. Format: ‘CMESTPFIX#’
The value will be increased for each new user at the Firm, e.g., CMESTPFIX1, CMESTPFIX2, CMESTPFIX3, etc.
Only applicable value is 'STP'. Will be populated by CME STP if 57-TargetSubID is provided by client on Session Logon Request.
Assigned value as defined by CME Group used to identify receiving firm.
CME STP will populate this value from 50-SenderSubID if provided by client Session Logon Request.
Integer message sequence number.
Indicates possible retransmission of message with this sequence number. Required for retransmitted messages.
‘Y’ (Possible duplicate)
'N' (Original transmission)
Indicates that message may contain information that has been sent under another sequence number.
|‘Y’ (Possible resend)|
‘N’ (Original transmission)
Time of message transmission (expressed in UTC). UTC Timestamps are sent in number of nanoseconds since Unix epoch synced to a master clock to microsecond accuracy.
Original time of message transmission when transmitting messages as the result of resend request (expressed in UTC).
UTC Timestamps are sent in number of nanoseconds since Unix epoch synced to a master clock to microsecond accuracy.
Required for message resent as a result of a resend request.