3Com 500 manual IP Host on the Same IP Network, 192.000.000.xxx

Examples of Typical ISDN Networking Applications 1-43

IP Host on the Same IP Network

If your organization operates a TCP/IP network and needs to extend the IP network over geographically remote sites, it is possible to bridge the network using the AccessBuilder 500. It is only possible to bridge where both sites have the same network address and the devices are on the same subnet. In a class C IP address, the network address is the first three groups of numbers. For example:

192.000.000.xxx

where xxx represents the host ID of the individual devices on the subnet. See “IP Addresses” in Appendix A for more information about addresses.

Typically IP bridging would be used to connect a back office or home office into a main site. Any further network connections would be carried out from the main site. An example of such a network is shown in Figure 1-22.

During configuration, you enter the ISDN number and the IP addresses of any hosts to which you want to connect. In the example in

Figure 1-22, the IP address of the host 191.000.000.100 is used and only when data destined for this device is received by the AccessBuilder 500, is a call made to the remote site.

Figure 1-22 IP Bridged Network