Funciones Especiales y sus Códigos:
Teléfonos Análogos y Digitales
| Función | Código |
| Account Code Access | # (pin number) |
| Callback –Set-up | 6 |
| Callback- Cancel | 6* |
| Callback- Cancel Individual | 6# Extension |
| Call Forward – Busy (External Source) | *62 |
| Call Fwd-Busy (Internal Source) | *61 |
| Call Fwd-Busy (Both) | *60 |
| Call Fwd No Answer (External Source) | *52 |
| Call Fwd No Answer (Internal Source) | *51 |
| Call Fwd No Answer (Both) | *50 |
| Call Fwd Follow Me | *64 |
| Call Fwd “I am here” | *68 |
| Call Fwd Cancel All | *54 |
| Call Hold | *70 |
| Call Hold Retrieve | *71 |
| Call Hold Remove Retrieve | *72 Extension |
| Call Pick-up | *66 |
| Directed Call Pick-up | *67 |
| Clear All Features | *44 |
| Speed Call Store | *40 |
| Speed Call Remove | *42 |
| Invoke | *41 |
| Tone Demonstration | *47+33 |
| Last Number Redial | *# |
| Call Park Remote Retrieve | *8 |
| Multiline Set Headset-On | **0 |
| Multiline Set Headset-Off | **1 |
| Message Waiting Activate | *74 |
| Message Waiting Desactivate | *75 |
| Message Waiting Inquire | |
| Conference Call | *45 |
| Conference Call Split | *46 |