This is evidenced by anyone who has used a modem to access the Web. At a modem's sluggish pace, it can take several minutes to download a Home Page, a business presentation or a lengthy research document. And frustrations will only increase, as new multimedia applications become more commonplace. Dial-up services, most commonly used by home users, require an account with an ISP, a modem and an analog phone line. Dedicated services, on the other hand, are priced according to bandwidth, not usage.
Dedicated services provide reliability and performance, but at a high cost and with no mobility.
Line charges can be staggering and a an expensive piece of equipment called a router is needed to get connected. The advantages of using ISDN for Internet access are numerous. ISDN is cheaper than dedicated services because charges are accrued only for time actually connected to the network. Local phone companies can support ISDN BRI over the same twisted pair wire that carries regular phone traffic. The only additional requirements are for an ISDN account from an ISP, access equipment that lets you connect your computer to the ISDN line and an ISDN line from your local phone company.