MERLIN LEGEND Communications System Release 6.1
System Manager’s Guide
555-661-118
Issue 1
August 1998
About the System
Page 2-30Data Communications Capabilities
2
Data Communications Capabilities 2
One of the important capabilities of the system is to 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
voice 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.
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™ 75 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 the connection, and
terminates the 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
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
(ISDN) 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 communications device to an MLX extension. Group
videoconferencing may require ExpressRoute 1000s, or an ISDN terminal adapter
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