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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Data Communications
Page 5-6About Data and Video Communications
5
Data Stations 5
A data station is a hardware configuration used to send and receive data (and/or
voice, depending on the equipment). The configuration must include two main
components: data terminal equipment (DTE) for input or output of data, along with
data communication equipment (DCE) to enable the transmission of data over
analog or digital lines/trunks. Depending on the station configuration, it may or
may not include a telephone, either analog or an MLX telephone.
The DTE is usually a PC, but can be a host computer, a LAN workstation, a
printer, an optical scanner, or a video system or other equipment used for data
input and/or output.
The DCE, which is either a modem or an ISDN terminal adapter (such as the
Ascend Pipeline 25PX or 50), allows data from the DTE to be transmitted over
digital or analog telephone lines/trunks. The DCE, which has capabilities similar to
a telephone, also may make the data call, maintain the connection, and terminate
the data call.
NOTE:NOTE:NOTE:
The DCE and DTE may have hardware and/or software options that can be
set for transferring and receiving data, such as parity and bit rate. For more
information, refer to the DTE and DCE documentation for configuration
compatibility requirements, options, and guidelines for changing options.
There are two types of data stations:
■ Modem Data Station. This type of data station sends and receives analog
data. It includes a modem as its DCE and is connected to an analog
extension jack or T/R jack on the control unit.
■ ISDN Terminal Adapter Data Station. This type of data station sends and
receives digital data. It includes an ISDN terminal adapter as its DCE and
is connected to a digital extension jack (MLX port) on the control unit.
Within each type, there are several configurations, depending on the station’s
capabilities (for example, voice and data or data only) and, therefore, what
equipment is involved and what type of module it connects to on the control unit.
This section describes each type of data station and the configurations supported
within each type.