CENTREX业务是利用公众网络的资源来组成专用网络,为公众网的用户提供虚拟的PABX ... 业务能够由任何模拟或ISDN电话提供,话务员可拥有CENTREX ...

ISDN testers verify the communication services provided by ISDN equipment. The integrated services digital network (ISDN) standard provides a guide for international telecommunications which connect ...

rationale for this book was that many people are forced to learn data communications because the processes aren't as transparent and as "plug and play" as they should be. Though these individuals ...

A device that enables several users on a network to access the Internet via ISDN. Also known as an ISDN LAN modem, it contains a BRI ISDN port and an Ethernet port. It may also provide several ...

A device that adapts a computer to a digital ISDN line. Like a modem, it plugs into the serial port of the computer or into an expansion slot. Some terminal adapters use the parallel port for ...

The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum of the diluted earnings per share from continuing operations ...