Polycom VSX Series manual If your network is You will need, Serial, 35/RS-449/ RS-530, Network

Administrator’s Guide for the VSX Series

Connecting Set-top and Component Systems to ISDN or Other Networks

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...	You will need
BRI	• 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.
PRI	• PBX crossover cable, if required for your PBX.
(North America and	• Channel Service Unit (CSU) — not required if you
Japan)
		connect the system to a PBX network.
	•	PRI line.
PRI	• 75 W coaxial adapter, if the network connection is
(outside North America		via a 75 W coaxial cable.
and Japan)	• PBX crossover cable, if required for your PBX.
	•	PRI line.
Serial	• Third-party network equipment and cables.
V.35/RS-449/ RS-530	Contact your network equipment vendor to obtain the
	appropriate cables for the equipment you connect to
	this interface. 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.

The diagram below shows a general view of how network interface modules are connected in set-top and component VSX systems.

VSX system

Network interface module

Additional device

Examples:

Quad BRI — NT-1

PRI — CSU V.35/RS-449/RS-530 — encryption equipment

Network

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