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P-662H/HW-D Series User’s Guide
42 Chapter 1 Getting To Know Your ZyXEL Device
High Speed Internet Access
The ZyXEL Device is an ADSL router compatible with the ADSL/ADSL2/ADSL2+
standards. Maximum data rates attainable for each standard are shown in the next table.
Note: If your ZyXEL Device does not support Annex M, the maximum ADSL2/2+
upstream data rate is 1.2 Mbps. ZyXEL Devices which work over ISDN do not
support Annex M.
The standard your ISP supports determines the maximum upstream and downstream speeds
attainable. Actual speeds attained also depend on the distance from your ISP, line quality, etc.
Zero Configuration Internet Access
Once you connect and turn on the ZyXEL Device, it automatically detects the Internet
connection settings (such as the VCI/VPI numbers and the encapsulation method) from the
ISP and makes the necessary configuration changes. In cases where additional account
information (such as an Internet account user name and password) is required or the ZyXEL
Device cannot connect to the ISP, you will be redirected to web screen(s) for information input
or troubleshooting.
Any IP
The Any IP feature allows a computer to access the Internet and the ZyXEL Device without
changing the network settings (such as IP address and subnet mask) of the computer, when the
IP addresses of the computer and the ZyXEL Device are not in the same subnet.
Firewall
The ZyXEL Device is a stateful inspection firewall with DoS (Denial of Service) protection.
By default, when the firewall is activated, all incoming traffic from the WAN to the LAN is
blocked unless it is initiated from the LAN. The ZyXEL Device firewall supports TCP/UDP
inspection, DoS detection and prevention, real time alerts, reports and logs.
Content Filtering
Content filtering allows you to block access to forbidden Internet web sites, schedule when the
ZyXEL Device should perform the filtering and give trusted LAN IP addresses unfiltered
Internet access.
Table 1 ADSL Standards
DATA RATE
STANDARD
UPSTREAM DOWNSTREAM
ADSL
832 kbps 8Mbps
ADSL2
3.5Mbps 12Mbps
ADSL2+
3.5Mbps 24Mbps