Network Overview - Polycom VIEWSTATION Training Manual

End-User Training Guide: ViewStation
Network Review
ISDN-BRI
1. The ViewStation requires a network connection to ISDN-BRI (Integrated
Services Digital Network-Basic Rate Interface). In simplest terms, ISDN
is a digital network for transmitting voice, data, and video over a single
line. This service is commonly ordered from your telephone carrier.
A single ISDN-BRI has two (B) Channels and (1) D Channel. The two
•
(B) channels carry user information at 64 kbps for a bandwidth of 128
kbps.
Each additional ISDN line will increase the bandwidth capability of the
•
system by 128 kbps per line.
2. A Network Terminal Interface (NT-1) is required for each ISDN line that is
connected to the ViewStation. The NT-1 isolates the network from the
equipment and protects it from an electrical overload on the network.
Tips & Tricks #1
The ViewStation
checks the
configuration of the ISDN line
every time a user powers it on.
Checking the ISDN line normally
takes less than a minute. If your ISDN line is not properly
configured, the initial calling screen will display an
ISDN checking icon in addition to the standard icons.
Basic videoconferencing ISDN diagram.
ISDN checking icon.
VSGi - Polycom ViewStation End-user Training Guide
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