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| Attribute | Description | Expected values | Mandatory |
|---|---|---|---|
| do_type | message type | TSCE, TSCGTS, TMA, TMN, ACK_TC, ACK_TVC | YES |
| do_station | station address | YES | |
| do_address | message address | YES | |
| do_value | value | TM (do_an = TMA): [-127..127] TM (do_an = TM8): [0..255] TM (do_an = TM16): [-32768..32767] TM: [0..1] TC: [1..2] (01b = off, 10b = on) TVC: [-255..255] | YES |
| do_valid | validity | valid = 0 or invalid = 1 | YES |
| do_cg | TS source | CG = 1 or CE = 0 | TS only |
| do_ts | timestamp | epoch timestamp in milliseconds | TS CE only |
| do_ts_iv | timestamp invalid | valid = 0 or invalid = 1 | TS CE only |
| do_ts_c | loss of chronology | lost = 0 else = 1 | TS CE only |
| do_ts_s | ts not synchronized | synchronized = 0 else = 1 | TS CE only |
...