ZyXEL ADSL Prestige 2602R-61 VoIP 91-006-024004B 用户手册

Prestige 2602R Series User’s Guide

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Chapter 1 Getting To Know Your Prestige

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

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

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.