Call Parameters
| Standard Interface | Enhanced Interface | |
|---|---|---|
| Function Number | Must be 121 | |
| Data String | See the following note | |
| Length | 1 is implied | Must be 4 |
| PS Position | NA | |
The calling data string can contain:
| Byte | Definition | |
|---|---|---|
| Standard | Enhanced | |
| 1 | 1 | A 1-character presentation space short name (PSID) |
| 2–4 | Reserved | |
Note: 1-character short name of the target presentation
space ID, or a blank or a null to indicate a request for the host-connected
presentation space.