ZyXEL Communications Prestige 2602R Series - Manual (Page 46)

Prestige 2602R Series User’s Guide
46 Chapter 1 Getting To Know Your Prestige
1.2.1 Internet Access
The Prestige is the ideal high-speed Internet access solution. Your Prestige supports the TCP/
IP protocol, which the Internet uses exclusively. It is compatible with all major ADSL
DSLAM (Digital Subscriber Line Access Multiplexer) providers. A DSLAM is a rack of
ADSL line cards with data multiplexed into a backbone network interface/connection (for
example, T1, OC3, DS3, ATM or Frame Relay). Think of it as the equivalent of a modem rack
for ADSL. In addition, the Prestige allows wireless clients access to your network resources. A
typical Internet access application is shown below.
Figure 1 Prestige Internet Access Application
1.2.1.1 Internet Single User Account
For a SOHO (Small Office/Home Office) environment, your Prestige offers the Single User
Account (SUA) feature that allows multiple users on the LAN (Local Area Network) to access
the Internet concurrently for the cost of a single IP address
1.2.2 Making Calls via Internet Telephony Service Provider
In a home or small office environment, you can use the Prestige 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 the Prestige (B) changes the call into
VoIP. The Prestige then sends your call to the Internet and the ITSP’s SIP server. 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.