ZyXEL Communications P-2802H-I Series, Руководство пользователя

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Chapter 1 Introducing the ZyXEL Device
P-2802H(W)(L)-I Series User’s Guide
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Use content filtering to block access to web sites containing keywords that you specify. You
can define time periods and days during which content filtering is enabled and include or
exclude particular computers on your network from content filtering. For example, you could
block access to certain web sites for the kids.
Use QoS to efficiently manage traffic on your network by giving priority to certain types of
traffic and/or to particular computers. For example, you could make sure that voice over
Internet calls get enough bandwidth in your network, and/or limit bandwidth devoted to the
boss’s excessive file downloading.
1.4.2 Wireless LAN Application
Add a wireless LAN to your existing network without expensive network cables. Wireless
clients can move freely anywhere in the coverage area and use resources on the wired network.
Figure 2 WLAN Application Example
1.4.3 Making Calls via Internet Telephony Service Provider
In a home or small office environment, you can use your device to make and receive VoIP
telephone calls through an Internet Telephony Service Provider (ITSP).
The following figure shows a basic example of how you would make a VoIP call through an
ITSP. You use your analog phone (
A in the figure) and your device ( B ) changes the call into
VoIP. Your device then sends your call to the Internet and the ITSP’s SIP server ( C ). The VoIP
call server forwards calls to PSTN phones ( E ) through a trunking gateway ( D ) to the PSTN
network. The VoIP call server forwards calls to IP phones ( F ) through the Internet.