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Chapter 4 - Installing Videoconferencing Systems
© Polycom, Inc. 81
3. Connect the network side of the Quad BRI network interface
module to the NT-1 device or to the ISDN network, as
appropriate.
Figure 4-4. Quad BRI Network Interface Module (Network Side)
4. If you are using an NT-1 device, connect it to the ISDN network.
You are now ready to power on and configure the system.
Installing a PRI Network Interface Module
This section provides information about installing the PRI network
interface module. This module is available for the ViewStation FX
and VS4000.
For performance specifications, cable diagrams and pinouts, and
other technical information, please refer to Technical Information
,
on page 11.
External Power Supply
If the PRI network interface module loses power, it creates an alarm
condition that may result in the service provider disabling the line.
The PRI network interface must be connected to the external 12-volt
DC power supply so that it does not lose power when the system is
powered off. Connect the external power supply to an
uninterruptable power supply (UPS) if possible.
The external power supply is mandatory for installations in Europe
and is strongly recommended where not mandatory.