The DDM Query Reply
Several DDM query reply formats are supported. Here are some of them:
| Offset | Length | Content | Meaning |
|---|---|---|---|
| 0 | 1 word | Length | Length of structure |
| 2 | 1 byte | X'81' | Query reply ID |
| 3 | 1 byte | X'95' | Query reply type |
| 4–5 | 2 bytes | FLAGS | Reserved |
| 6–7 | 2 bytes | LIMIN | Maximum DDM bytes allowed in inbound transmission |
| 8–9 | 2 bytes | LIMOUT | Maximum DDM bytes allowed in outbound transmission |
| 10 | 1 byte | NSS | Number of subsets identifier |
| 11 | 1 byte | DDMSS | DDM subset identifier |