| Code | Description | Comment | Version |
| EE | End related service request(s), end current service request. | | added v2.5 |
| ES | End related service request(s), start current service request. | | added v2.5 |
| SE | Start related service request(s), end current service request. | | added v2.5 |
| SS | Start related service request(s), start current service request. | | added v2.5 |