Home Network Basis: Transmission Environments and Wired/Wireless Protocols

12.1. Broadband Internet Access

A popular home network application is for sharing of a broadband access service, such as an ADSL line or a cable modem, among multiple PCs and their users in a household. Let us first examine what is involved in connecting a single user to the ADSL service. Figure 12.1 shows the general ADSL installation for a single PC at a household. With the splitterless installation approach, an ADSL modem can be located anywhere in a household as long as a regular RJ-11 telephone jack is available. For this approach, microfilters sometimes might need to be inserted between those RJ-11 jacks and the connected telephone sets to isolate low input impedances of telephone sets at high frequencies from interfering with the proper ...