Glossary
O
OneVision | A family of software products for managing DEFINITY G3 PBXs as part of |
| an enterprise network management system. |
OSSI | Operating Support System Interface. The |
| supported by DEFINITY G3 PBXs for management and control of the |
| PBX. |
P
path line | The top line of a |
| selection of an active form, the feature selected, and the page number. |
| Also known as the status line. |
path name | The route to a file on a disk. The path name starts with the top directory, |
| then the subdirectories, and finally the file. In the example /usr/bin/ls, /usr |
| is the directory, /bin is the subdirectory, and ls is the filename. |
PBX | Private branch exchange. A |
| interprets dial pulses, tones, and keyboard characters and makes the |
| proper interconnections for calls to destinations both inside and outside |
| the system. |
| A PBX provides voice and data communications services, including |
| access to public and private networks, for telephones and data terminals |
| on a customer’s premises. The PBX itself consists of: a digital computer, |
| software, storage device, and carriers with special hardware to make the |
| actual connections. |
| Also known as a switch. In this book, refers to a DEFINITY G3 PBX. |
PDM | Processor data module. A device that provides protocol conversion |
| between |
| PDM provides an |
| connecting to data terminals or host computers. On the other side, a PDM |
| provides a digital communications protocol interface for connection to a |
| PBX. |
PN | Port network. An architectural component of a PBX that contains a |
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