Filter
Top Products
DTE CONNECTIONS 8-5
_ ______________________________________________________________________________________
_ ______________________________________________________________________________________
_ ______________________________________________________________________________________
DCE POSSIBILITIES
DCEs that communicate with AT&T communications systems can be categoried as follows:
• Data Modules — Link DTEs with the switch’s digital ports — that is, BRI and DCP ports. Because
data modules are digital, they cannot be used with standalone remote DTEs that communicate through
the public network unless DSUs and the DATAPHONE digital service are provided at the remote end of
the connection.
Note that although data modules always function as digital data communications devices, some data
modules provide either a DCE or DTE interface. DCE interfaces communicate with DTEs, like
terminals, PCs, computer ports; DTE interfaces communicate with other DCE devices, such as modems
and DSUs.
• Asynchronous Data Units (ADUs) — Extend a DTE RS-232 link for connection to a switch or host EIA
port. The switch EIA port contains a data module.
• Modems — Link DTEs with analog ports on the DIMENSION, System 75, System 85, and Generic 1 and
2 communications systems.
See figure 8-2 for some possible configurations.
Data Modules
The data modules that are available for connecting terminals or hosts through the switch can be voice
terminal adjuncts or standalone units.
Voice Terminal Adjunct Data Modules
Voice terminal adjuncts units are data modules that are integrated into the voice terminal design such that
the voice terminal and the data module create a single footprint. Voice terminal adjuncts data modules
include the following:
• 7404 Data Module* — A DCP data module built into the 7404 voice terminal. The module provides an
RS-232C asynchronous DCE interface.
• 7406 Data Stand* — A DCP data module that includes a base large enough to mount the 7406D voice
terminal beside it. The stand provides an RS-232C asynchronous DCE interface.
• 7407 Data Stand* — A DCP data modules that includes a base large enough to mount the 7407D voice
terminal beside it. The stand provides a RS-232C asynchronous DCE interface.
• Digital Terminal Data Module* (DTDMs) — DCP data modules that can attach to the 7403D and
7405D voice terminals.
• Asynchronous Data Modules (ADMs) — BRI data modules that connect to the 7505, 7506, and 7507
voice terminals. ADMs provide an RS-232D asynchronous DCE interface.
__________________
* Manufacturer discontinued (MD)