Polycom ViewStation User Manual
Page 233
Glossary
© Polycom, Inc.
217
ViewStation User Guide
BRI
The ISDN Basic Rate Interface, or BRI,
provides two B channels and one 16 Kbps D
channel (2B+D) for a total of 144 Kbps (128K
for Video).
Bridge
A device that passes packets between
multiple network segments using the same
communications protocol.
If a packet is destined for a user within the
sender’s own network segment, the bridge
keeps the bridge packet local.
If the packet is bound for another segment,
the passes the packet onto the network
backbone. Also, in videoconferencing, a
Multi-Point Control Unit. See MCU.
CIF
Common Intermediate Format. An
intermediate video format. CIF resolution is
352x288 pixels. QCIF (quarter CIF) is
176x144 pixels.
Client
A networked PC or terminal that shares
services with other PCs. These services are
stored on or administered by a server.
Conference Call
Any voice or data call that establishes
contact with two or more end points, such
that each end point is able to communicate
to the others. Conference calls require some
type of service that links all the end point
together, and transmits all voice/data to each
end point. This service can be provided by a
PBX (typically by using the flash key), or by
contacting a conference bridge.