| Tag | Field Name | Req'd | Comments |
|---|
| StandardHeader | | Yes |
MsgType = A
|
| 98 | EncryptMethod | Yes |
(Always unencrypted)
|
| 108 | HeartBtInt | Yes |
Note same value used by both sides
|
| 95 | RawDataLength | No |
Required for some authentication methods
|
| 96 | RawData | No |
Required for some authentication methods
|
| 141 | ResetSeqNumFlag | No |
Indicates both sides of a FIX session should reset sequence numbers
|
| 789 | NextExpectedMsgSeqNum | No |
Optional, alternative via counterparty bi-lateral agreement message gap detection and recovery approach (see "Logon Message NextExpectedMsgSeqNum Processing" section)
|
| 383 | MaxMessageSize | No |
Can be used to specify the maximum number of bytes supported for messages received
|
| MsgTypeGrp | | No | |
| 464 | TestMessageIndicator | No |
Can be used to specify that this FIX session will be sending and receiving "test" vs. "production" messages.
|
| 553 | Username | No | |
| 554 | Password | No |
Note: minimal security exists without transport-level encryption.
|
| 1137 | DefaultApplVerID | Yes | The default version of FIX being carried over this FIXT session |
| StandardTrailer | | Yes | |