User`s guide

Networks
2 - 17
Connecting Polycom HDX Systems to ISDN or Other
Networks
The following network interface modules are available:
•BRI — Allows you to connect to an ISDN network using up to four BRI
lines.
•PRI — Allows you to connect to an ISDN T1 or E1 network using a PRI
line.
• V.35/RS-449/RS-530 — Allows you to connect to third-party network
equipment, including encryption equipment and RS-366 dialers.
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. Make sure that the
system is powered off before you connect devices to it.
You will need the following network hardware.
If your network
interface module 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
(North America and
Japan)
• 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.
PRI
(outside North America
and Japan)
• 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.
Serial
V.35/RS-449/ RS-530
(with RS-366 dialing)
• Third-party network equipment and cables.
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.