Customer premises networks of the future

B-ISDN based on ATM technologies is expected to offer enhanced and sophisticated services to users, but selecting a graceful migration path is critical. During the introductory stage of the ATM-customer premises network (CPN)/spl minus/as an initial broadband public network service/spl minus/ATM leased-line service will use VP crossconnect network. An efficient CPN interconnection via end-to-end VP pipe therefore would be an attractive application. The possible migration scenario of ATM-CPN is presented, the required functions and services in future CPN are clarified for each evolutional stage, i.e., the introductory, expansion and diffusion stages, and the importance of medium-bit-rate SB interfaces is described. It is also shown that a 10 to 20 Mb/s metallic interface should be introduced as a cost-effective SB interface.<>