Calling Through A Cable Or Dsl Modem - Polycom V500 System Administrator's Manual

Administrator's Guide for the V500 System
3 - 6
If, therefore, you're limiting your calls to other systems within your intranet,
you don't need to perform any additional network configuration to use your
V500. Simply go on to

Calling Through a Cable or DSL Modem

You can access the network and make video calls by directly connecting your
V500 to a cable modem or Digital Subscriber Line (DSL) modem, without
using a network router.
If you have a DSL connection and you are in a home environment or your DSL
modem does not maintain a connection state automatically, Polycom recommends
that you use a network router.
Directly connecting your V500 to the network with a cable or DSL modem
does not provide you with a security barrier between your home or business
network and the Internet; however, it is an easy way to set up your V500
network connection.
Visit the Polycom Security Center at
information. Systems deployed outside a firewall are potentially vulnerable to
unauthorized access. You can also register to receive periodic email updates and
advisories.
If your V500 system is directly connected to a cable or DSL modem, you don't
need to perform any additional network configuration to use your V500.
Simply go on to Configuring IP Network Support
Calling Through a Network Router
Network routers let you connect more than one computer, video conferencing
system, or other device to your cable or DSL modem so that they all can share
the same high-speed network connection. This is accomplished by using
Network Address Translation (NAT) services. Routers also often offer firewall
protection.
• In a typical IP network, all the devices within the network have their own
unique IP address, which is available for everyone in or outside the
network to access. With a NAT, each device within the network retains its
own IP address, but the NAT presents a single IP address to the outside
world. This provides an extra level of security because devices inside the
network are masked behind that single, external IP address.
A firewall acts as a security barrier between one network and another.
•
Often that barrier is between a smaller network, like you might have at
your home or business, and an exterior network, such as the Internet. The
firewall prevents unsolicited external network traffic from accessing your
internal network.
Configuring IP Network Support
www.polycom.com
on page 3-13.
for timely security
on page 3-13.