Measurement Computing COM232/8AT - Manual (Page 7)

1000-0901, rev 1.1 March 1998 COM232/8AT User’s Guide 7
Output Configurations
Note: The COM232/8AT board is an RS-232-C DTE (Data Terminal Equipment) device.
RS-232-C Devices
RS-232-C devices are classified according to their function as either Data Terminal Equipment (DTE)
or Data Communication Equipment (DCE). These terms are typically defined as follows:
Data Terminal Equipment (DTE) − A device which serves as the communication source.
Data Communication Equipment (DCE) − A device which provides a channel for communication
between two DTE type devices.
The figure to the right illustrates a basic example of
Data Terminal Equipment (DTE) and Data
Communication Equipment (DCE) making use of
RS-232-C communication links.
As noted above, the COM232/8AT board is an
RS-232-C DTE device. The following figure shows
the layout of the 8-port output connector and includes
the RJ-11 Pinout.
The configuring of AuxIN and AuxOUT is determined by the setting of Jumpers JP1 through JP8, with each jumper
affecting its related port. There are three possible configurations, as indicated in the following examples.