ISDN connectivity allows computers to communicate over a network.综合业务数字网连接实现了计算机网络通讯。By contrast, ISDN basic service provides symmetrical 128 Kbps service within 18,000 feet of the central office.与之相反, ISDN的基本服务在距电话局的1.8...
ISDN connectivity allows computers to communicate over a network.综合业务数字网连接实现了计算机网络通讯。At the telephone company end, ISDN lines connect to a digital switch.在电话局一端, ISDN线连到数字交换机.Like ISDN, ADSL will use normal qualified cop...