GL-6 Issue 2 April 1996
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 machine-to-machine interface
supported by DEFINITY G3 PBXs for management and control of the
PBX.
P
path line The top line of a G3-MA screen that shows the current command
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 software-controlled processor complex that
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 RS-232 and digital communications protocol. On one side, a
PDM provides an RS-232 data communications equipment interface for
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
time-division-multiplexed (TDM) bus and packet bus to which the
