| Segment | Cardinality | Implement | Status |
|---|---|---|---|
| [1..1] | SHALL | ||
| [1..1] | SHALL | ||
| [0..1] | |||
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[0..1] | ||
| [1..1] | SHALL | ||
| B | |||
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| [1..1] | SHALL | ||
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| [1..1] | SHALL | ||
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[0..1] | ||
| [1..1] | SHALL | ||
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| [1..1] | SHALL | ||
| MSH-15 | MSH-16 | Immediate ACK | Application Ack |
|---|---|---|---|
| Blank | Blank | ACK^O22^ACK | - |
| NE | NE | - | - |
| AL, ER, SU | NE | ACK^O22^ACK | - |
There is not supposed to be an Application Level acknowledgement to an Application Level Acknowledgement message. In Enhanced Mode, MSH-16 SHALL always be set to NE (Never).