Opq - Polycom ViewStation SP128 User Manual

OPQ

PTZ
POTS or PSTN
Private Branch eXchange (PBX)
QCIF
QoS
© Polycom, Inc.
Pan/Tilt/Zoom.
Pan – rotating camera to the left or right.
Tile – rotating camera up or down.
Zoom – making image larger (telephoto) or
smaller (wide angle).
Plain Old Telephone Service or Public
Switched Telephone Network. The basic
service that supplies a single analog
telephone unit with access to the public
switched network (via the local telephone
service provider). Refers to the worldwide
voice telephone network accessible to all
those with telephones and access privileges.
A private telephone switching system,
usually located on a customer's premises
with an attendant console. It is connected to
common group of lines from one or more
central offices to provide service to a number
of individual phones. Most PBXs allow
analog extensions on the system, allowing
access to special features such as
conferencing and transferring to analog
devices. A PBX connects to the telephone
lines supplied by the CO (Central Office).
Quarter CIF. A quarter of the Common
Intermediate Format = 176 X 144 pixels
Quality of Service. This allows guaranteed
bandwidth and packet delivery between
endpoints over a packet network.
169
Glossary
ViewStation SP User Guide