| OID | 1.3.6.1.4.1.7505.1.1.15.1.3 |
| Module | CALISTA-DPA-MIB (CISCO) |
| Nom | portTelephonyLinkState |
| Acces | readonly |
| Status | mandatory |
| Description | The state of the digital telephony link. This field only has meaning for physical ports connected to Octel voicemail systems or digital PBX systems. For virtual ports or those currently not in use, the state will be returned as notApplicable. |
| Syntaxe | Enumeration (1-notApplicable, 2-down, 3-registering, 4-up) |