A router with a serial interface will be used for an ISDN link.What other function group devices are required to complete the connection to the service provider? ()
Which ISDN device converts the four-wire BRI signals from an S/T interface into two-wire signals of a U interface?()
Which of the following statements regarding ISDN are correct?()
ISDN的特点是()。
A Router with a BRI/T interface will be used for an ISDN Connection what other ISDN device is required to complete this connection? ()
Which of the following technologies is used on the backbone of an ISDN?()
You have a single ISDN BRI B channel. What is its maximum bandwidth capacity of this one channel?()
INMARSAT-F船站ISDN特点是()。
说明数字用户线接口电路的基本功能,指出ISDN数字用户接口(2B+D)的含义及其传输速率。
B-ISDN是未来通信网的发展趋势,它的实现是基于()技术。