This message is used to send equipment notifications from one application to another (e.g., alerts sent by automated equipment to a Laboratory Automation System).
| MSH-15 | MSH-16 | Immediate ACK | Application Ack |
|---|---|---|---|
| Blank | Blank | - | ACK^U09^ACK |
| NE | NE | - | - |
| AL, SU, ER | NE | ACK^U09^ACK | - |
| NE | AL, SU, ER | - | ACK^U09^ACK |
| AL, SU, ER | AL, SU, ER | ACK^U09^ACK | ACK^U09^ACK |