User manual ZYXEL P-660R-D BROCHURE

[. . . ] P-660R-D Series ADSL2+ Router User's Guide Version 3. 40 7/2006 Edition 1 P-660R-D Series User's Guide Copyright Copyright © 2006 by ZyXEL Communications Corporation. The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. Neither does it convey any license under its patent rights nor the patent rights of others. [. . . ] Some ISP's choose to pass the DNS servers using the DNS server extensions of PPP IPCP (IP Control Protocol) after the connection is up. If your ISP did not give you explicit DNS servers, chances are the DNS servers are conveyed through IPCP negotiation. The ZyXEL Device supports the IPCP DNS server extensions through the DNS proxy feature. If the Primary and Secondary DNS Server fields in the DHCP Setup screen are not specified, for instance, left as 0. 0. 0. 0, the ZyXEL Device tells the DHCP clients that it itself is the DNS server. When a computer sends a DNS query to the ZyXEL Device, the ZyXEL Device forwards the query to the real DNS server learned through IPCP and relays the response back to the computer. Please note that DNS proxy works only when the ISP uses the IPCP DNS server extensions. It does not mean you can leave the DNS servers out of the DHCP setup under all circumstances. If your ISP gives you explicit DNS servers, make sure that you enter their IP addresses in the DHCP Setup screen. This way, the ZyXEL Device can pass the DNS servers to the computers and the computers can query the DNS server directly without the ZyXEL Device's intervention. 67 Chapter 5 LAN Setup P-660R-D Series User's Guide 5. 1. 4 DNS Server Address Assignment Use DNS (Domain Name System) to map a domain name to its corresponding IP address and vice versa. The DNS server is extremely important because without it, you must know the IP address of a computer before you can access it. · The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you sign up. If your ISP gives you DNS server addresses, enter them in the DNS Server fields in the DHCP Setup screen. · The ZyXEL Device acts as a DNS proxy when the Primary and Secondary DNS Server fields are left as 0. 0. 0. 0 in the DHCP Setup screen. 5. 2 LAN TCP/IP The ZyXEL Device has built-in DHCP server capability that assigns IP addresses and DNS servers to systems that support DHCP client capability. 5. 2. 1 IP Address and Subnet Mask Similar to the way houses on a street share a common street name, so too do computers on a LAN share one common network number. Where you obtain your network number depends on your particular situation. If the ISP or your network administrator assigns you a block of registered IP addresses, follow their instructions in selecting the IP addresses and the subnet mask. If the ISP did not explicitly give you an IP network number, then most likely you have a single user account and the ISP will assign you a dynamic IP address when the connection is established. If this is the case, it is recommended that you select a network number from 192. 168. 0. 0 to 192. 168. 255. 0 and you must enable the Network Address Translation (NAT) feature of the ZyXEL Device. The Internet Assigned Number Authority (IANA) reserved this block of addresses specifically for private use; please do not use any other number unless you are told otherwise. Let's say you select 192. 168. 1. 0 as the network number; which covers 254 individual addresses, from 192. 168. 1. 1 to 192. 168. 1. 254 (zero and 255 are reserved). In other words, the first three numbers specify the network number while the last number identifies an individual computer on that network. Once you have decided on the network number, pick an IP address that is easy to remember, for instance, 192. 168. 1. 1, for your ZyXEL Device, but make sure that no other device on your network is using that IP address. The subnet mask specifies the network number portion of an IP address. [. . . ] 3 Connect the side labeled "Line" to the telephone wall jack. Telephone Microfilters Telephone voice transmissions take place in the lower frequency range, 0 - 4KHz, while ADSL transmissions take place in the higher bandwidth range, above 4KHz. A microfilter acts as a low-pass filter, for your telephone, to ensure that ADSL transmissions do not interfere with your telephone voice transmissions. 2 Connect a cable from the wall jack to the "wall side" of the microfilter. Appendix H Splitters and Microfilters 1 P-660R-D Series User's Guide 3 Connect the "phone side" of the microfilter to your telephone as shown in the following figure. If your telephone does not work, disconnect the microfilter and contact either your local telephone company or the provider of the microfilter. Figure 120 Connecting a Microfilter You can also use a Y-Connector with a microfilter in order to connect both your modem and a telephone to the same wall jack without using a POTS splitter. [. . . ]