Setting up an ISP

All PCs must also have other IP conﬁguration information, including a subnet mask, a domain name server (DNS) address, and a default gateway address. This information is also assigned automatically by the Model RT338 router whenever a PC reboots. For more information about these parameters, refer to the Model RT338 ISDN Router Installation Guide.

Using Private IP Addresses

Using the DHCP protocol, the Model RT338 router assigns private IP addresses to all the PCs on your LAN (when the PC reboots). The Internet Engineering Task Force (IETF) reserves these addresses for use in private networks:

•192.168.0.1—local IP address for the router (This address also serves as the DNS address and default gateway address for all of the PCs.)

•192.168.0.2 through 192.168.0.32—IP addresses of your PCs

•255.255.255.0—subnet mask for your router and PC

Contact an ISP and request a single-user Internet access account. You can connect a multiuser LAN through a single-user account by using the Network Address Translation (NAT) feature on the router.

In a single-user account, the ISP assigns one registered IP address to use. With most accounts, this address is assigned dynamically each time you log in to the account, so you will not need to know the actual address. The NAT feature translates the private IP addresses of your network PC(s) to this address for accessing the Internet.

Account Information

The ISP should give you the following information for your account:

•Local phone number for accessing the ISP

•Login name

•Password

Questions to ask the ISP

In addition, you should ask your ISP these questions:

•Will the IP address be dynamically assigned?

Refer to the Model RT338 ISDN Router Installation Guide on the Model RT338 Resources CD for instructions to conﬁgure a static IP address.

•Will your DNS server address be dynamically assigned? If not, enter it in FirstGear’s ISP connection.

•Does your ISP support Multilink Protocol?

If you want to connect both ISDN B channels simultaneously for a 128 Kbps connection, your ISP must support Multilink Protocol.

Model RT338 ISDN Router Installation Guide