Polycom PVX Software Manual page 6

Internet and Intranet Calling with Polycom PVX 8.0.1
Setup for Calling Through a DSL or Cable Modem
Use the following instructions for setting up PVX on a computer that accesses the Internet
directly through a DSL or cable modem with no network router.
Calls across the public Internet typically pass through a firewall that protects the computer
from unsolicited traffic from the outside. Computers connected directly to a broadband
modem often use a software-based firewall. If you have firewall software installed on your
computer, you may need to disable or configure the software to allow PVX traffic. See the
Testing and Troubleshooting section of this document for more information.
Enter this information in the setup wizard screens:
❑
NAT Detected dialog box: If the wizard asks whether to use the external WAN
address, click No.
❑
Select Your IP Address dialog box: If the wizard detects multiple addresses and asks
you to choose the recommended address, click OK.
❑
Network Setup dialog box: Select Use the PC's Local IP Address.
Setup for Calling Through a Network Router
Network routers enable multiple computer resources to share a high-speed Internet
connection such as Digital Subscriber Lines (DSL) or cable. Most routers for Small Office
Home Office (SOHO) networks include a firewall to protect the network by controlling
unsolicited traffic from outside the network. To allow video conferencing traffic to pass in
and out of your local network, you must open ports in the firewall or your router will block
the request.
Routers also provide Network Address Translation (NAT). NAT uses private internal IP
addresses for the devices within the network while using a single external IP address to
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