| External Tone Encoder | ||||
| Product Code 33 | ||||
| Manuals | ||||
| Maintenance Manual (Green) | ||||
| Digit 1 | Digit 2 | Digit 4 | ||
| B | 1, 2, 3, 4 | X | LBI3687 | DF5030 |
| B | 1 | M | LBI4835 | DF5046 |
| E | 1, 5, 7, 9 | X, M | LBI4438 | DF8406 |
| Option | ||||
| 4069 | LBI30266 | |||
| 4078 | NONE | |||
| 4095 | LBI3687 | DF5030 | ||
| 4098 | LBI3687 | DF5030 | ||
| 7468 | LBI4835 | DF5046 | ||