Networks - Polycom VSX 3000 Administrator's Manual

Connecting Set-top and Component Systems to ISDN or Other Networks
VSX system
If you received a network interface module with your system, you may find it
convenient to install it before positioning the system. Refer to the setup sheet
that you received with the network interface module.
You will need the following network hardware:
If your network is...
BRI
PRI
(North America and
Japan)
PRI
(outside North America
and Japan)
Serial
V.35/RS-449/ RS-530
The diagram below shows a general view of how network interface modules
are connected in set-top and component VSX systems.
Network
interface
module
You will need
• NT-1 device, if the system will be connected to a
network that provides a U interface. Do not use an
NT-1 device if your PBX network provides an S/T
interface.
• Up to 4 BRI lines that will not be shared with other
equipment.
If you connect fewer than four BRI ports on the
system's network interface module, connect them in
ascending order, starting with port 1.
• PBX crossover cable, if required for your PBX.
• Channel Service Unit (CSU) — not required if you
connect the system to a PBX network.
• PRI line.
• 75 W coaxial adapter, if the network connection is
via a 75 W coaxial cable.
• PBX crossover cable, if required for your PBX.
• PRI line.
• Third-party network equipment and cables.
If you use only one cable, connect it to port 1 of the
network interface module and to the lowest-numbered
port of the data communications equipment.
Additional device
Examples:
Quad BRI — NT-1
PRI — CSU
V.35/RS-449/RS-530 —
encryption equipment
Setting Up Your System Hardware
ISDN
2 - 13