| Offsets | Name | Length | Format | Description | |
|---|---|---|---|---|---|
| 0 | SMF99_IOSUB_Index | 2 | binary | Subsystem index. This correlates with SMF999_IOSUB_INDEX. | |
| 2 | 2 | * | 2 | binary | Reserved. |
| 4 | 4 | SMF99_IOSUB _ConnectSamples | 2 | binary | Connect samples. |
| 6 | 6 | SMF99_IOSUB _PendingSamples | 2 | binary | Pending samples. |