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Chapter 2 - Setting Up Your System Hardware
© Polycom, Inc. 2-11
ISDN Network Hardware Checklist
Depending on your network type, you will need the following hardware:
Quad BRI Network Interface Module
The Quad BRI network interface module allows you to make ISDN calls using up
to four BRI lines.
In addition to the Quad BRI network interface module and the cables provided
with it, you will need an NT-1 device if your site does not use an internal telephone
system (PBX). A PBX or an NT-1 device provides the S/T interface that the Quad
BRI module requires.
If your ISDN network is... You will need...
BRI • Quad BRI network interface module with cables
• Up to 4 BRI lines that will not be shared with other
equipment
• NT-1 device, if the system will be connected to a PBX
network that does not provide an S/T interface
Note: If your Quad BRI system is connected to a PBX
that provides an S/T interface, do not use an NT-1 device.
PRI/T1
(commonly available in
North America)
• PRI network interface module with cable
• North America: Channel Service Unit (CSU), if the
system will not be connected to a PBX network
• PRI line
PRI/E1
(commonly available
outside North America)
• PRI network interface module with cable
• PRI line
Serial
(V.35/RS-449/ RS-530)
• Serial V.35/RS-449/RS-530 network interface module
• Third-party network equipment and cables