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1. Introduction


Overview

Congratulations on the purchase of your new Level One ISDN Router.

The Level One ISDN Router will allow multiple users on the LAN to gain shared Internet access. Users can share the ISDN connection and the Internet user account.

Figure 1: Office to Internet

The Level One ISDN Router provides a low-cost method of giving users of your network access to the vast resources available on the Internet. Once the Level One ISDN Router is installed and configured, the Internet is just a click away.

The Level One ISDN Router is able to use your ISDN link to connect to your ISP (Internet Service Provider), providing the required log-in information.

Alternatively, you can use the Level One ISDN Router to provide a seamless, automatic connection to another LAN, provided a matching device is installed on the other LAN.


Features

The Level One ISDN Router incorporates many advanced features, carefully designed to provide sophisticated functions while being easy to use.

LAN Features

Internet Access Features

ISDN Features

Configuration & Management

Advanced Functions

Security Features

Firewall Protection

The firewall protection provided by the Level One ISDN Router is an intrinsic side effect of IP sharing. All users on the LAN share a single external IP address. From the external viewpoint, there is no network, only a single device.

For internal users, the Level One ISDN Router acts as a "transparent proxy server", translating the multiple internal IP addresses into a single external IP address.

For external requests, any attempt to connect to local resources are blocked. The Level One ISDN Router will not "reverse translate" from a global IP address to a local IP address.

This type of "natural" firewall provides an impregnable barrier against malicious attacks.


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