Call Code
The Call Code is a single alphanumeric added to the TRUST 10-character train ID, dependent on the train's departure time from its origin. In combination with the first two digits of the STANOX, it ensures that - where a train reporting number may be reused several times in a day for a service from a particular location (e.g. the Stourbridge Town shuttle), that the TRUST ID for each train remains unique.
If a second train is called in the time period which would result in a duplication of TRUST IDs, then the TSPEED will be increment from M to N, O, A, B and then F to ensure the train ID is unique.
The values are as follows:
| Departure time | Code |
|---|---|
| 0000-0059 | 0 |
| 0100-0159 | 1 |
| 0200-0259 | 2 |
| 0300-0359 | 3 |
| 0400-0459 | 4 |
| 0500-0559 | 5 |
| 0600-0659 | 6 |
| 0700-0729 | A |
| 0730-0759 | B |
| 0800-0829 | C |
| 0830-0859 | D |
| 0900-0929 | E |
| 0930-0959 | F |
| 1000-1029 | G |
| 1030-1059 | H |
| 1100-1129 | I |
| 1130-1159 | J |
| 1200-1229 | K |
| 1230-1259 | L |
| 1300-1329 | M |
| 1330-1359 | N |
| 1400-1429 | O |
| 1430-1459 | P |
| 1500-1529 | Q |
| 1530-1559 | R |
| 1600-1629 | S |
| 1630-1659 | T |
| 1700-1729 | U |
| 1730-1759 | V |
| 1800-1829 | W |
| 1830-1859 | X |
| 1900-1959 | Y |
| 2000-2059 | Z |
| 2100-2159 | 7 |
| 2200-2259 | 8 |
| 2300-2359 | 9 |