Having a consistent numbering scheme for the extensions created within a customer PBX allows for easier turn-up and easier reference points when troubleshooting.
For 3 digit Numbering
| Number Range | Feature/Function |
|---|---|
| 100-199 | Extensions |
| 200-299 | Extensions |
| 300-399 | Extensions |
| 400-499 | Call Queues |
| 500-599 | Call Queues |
| 600-699 | Conferences |
| 700-799 | Call Parks |
| 800-899 | Auto Attendants |
| 900-999 | Auto Attendants |
