Lucent Technologies 5 manual Data Communications Capabilities

MERLIN LEGEND Communications System Release 5.0		Issue 1
System Manager’s Guide 555-650-118		June 1997
2 About the System
	Data Communications Capabilities	Page 2-29
	Data Communications Capabilities	2

One of the important capabilities of the system is that it can carry both voice and data communications simultaneously over the same lines. In addition, system features used for voice communications, such as Automatic Route Selection, calling restrictions, and speed dialing can also enhance the use of data equipment.

NOTE:

For the most up-to-date information about data and video communications, consult the Data/Video Reference.

Thus, the system allows you to use telephone lines for communicating not only voices but data and video too. For example, a computer in New York can send data files to a computer in San Diego. At your own company, your PC can communicate with a gateway computer on a local area network (LAN) and gain access to the network; or, you can call your office computer from your home computer and send files back and forth between your home and office.

In addition, the system supports advanced network services that integrate voice and data, such as group and personal videoconferencing.

A special type of extension, called a data workstation, is used for data communications. It may include a telephone and always includes two types of equipment:

■Data Terminal Equipment (DTE). For example, a PC, data terminal, printer, optical scanner, or video system.

■Data Communications Equipment (DCE). For example, an internal or external modem or an external Ascend Pipeline™ 50 ISDN terminal adapter.

The DTE connects to the system via the DCE, which has capabilities similar to a telephone. The DCE places the data call, maintains its connection, and terminates the data call.

Sometimes a telephone is also part of a data workstation. The telephone can be either an MLX or an analog multiline telephone that operates independently of the data communications equipment (DCE). You can attach a modem to either an analog or MLX telephone adapter.

A video workstation is a type of data workstation that allows group or desktop videoconferencing.

For high-speed data communications over Integrated Services Digital Network Basic Rate Interface (NI-1 BRI, Release 4.0 and later) or Digital Signal 1 (DS1) Primary Rate Interface (PRI) or T1 Switched 56 (Release 4.0 and later) facilities, you can attach an ExpressRoute 1000 ISDN Terminal Adapter or another ISDN