ERR0300 - 0399
| ERR0300 | tn Customer has no Dial Intercom Group (DIG) defined or DIG package does not exist. Action: Review office data and notify operating company. |
| ERR0301 | tn DIG group does not exist for this terminal number. Action: Check group number on DIG key for this set. |
| ERR0302 | tn Action: Check group number on DIG key on this set. |
| ERR0303 | tn Originating DIG group is not the same as the terminating group for this key and DN. Action: Check DIG group for specified TN. |
| ERR0304 | tn Set does not belong to the same customer as the DIG. Action: Check DIG list for the set. |
| ERR0305 | Invalid tstl linkage. |
| ERR0306 | Customer translation failed. |
| ERR0307 | TNS actv.cr does not point to Call Register (CR). |
| ERR0319 | Bad LLC blocking value found. |
| ERR0367 | Son call register is an orphan, idle it. |