Specifications

Wavespeed/S Configuration Guide (90000407 Rev. C) – Page 9
Pin Outs
DTE Device: DCE Device:
PIN Direction Signal PIN Direction Signal
1 Input DCD 1 Output DCD
2 Input RX 2 Output TX
3 Output TX 3 Input RX
4 Output DTR 4 Input DTR
5 -- GND 5 -- GND
6 Input DSR 6 Output DSR
7 Output RTS 7 Input RTS
8 Input CTS 8 Output CTS
9 Input RI 9 Output RI
The fastest way to determine whether a device is a DTE or a DCE device is to check the voltage level on
pin 2 of the DB-9 when the COM port is active. If the voltage is –12 V to –3 V, then the device is likely a
DCE. You can further confirm that conclusion by checking the voltage on pin 3. On a DCE device, the
level should be at ground.
The opposite is true of a DTE device. The voltage of pin 2 should be ground and the voltage of pin 3 should
be in the –12 V to –3 V range.
Regulation and Other Information
© 2006 Digi, Digi International, the Digi logo, the Digi
Connectware logo, and /S are trademarks or registered
trademarks of Digi International, Inc. in the United
States and/or worldwide. All other trademarks are the
property of their respective owners.
Information in this documentation is subject to change
without notice and does not represent a commitment on
the part of Digi International.
Digi International provides this document “as is,” with-
out warranty of any kind, either expressed or implied,
including, but not limited to, the particular purpose.
Digi International may make improvements and/or
changes to this documentation or to the product(s)
and/or program(s) described in this documentation at
any time.
Digi International assumes no responsibility of any er-
rors, technical inaccuracies, or typographical errors that
may appear in this documentation, nor liability for any
damages arising out of its use. Changes are made peri-
odically to the information herein; these changes may
be incorporated in new editions of the publication.
For U.S. Government use:
Any provision of this document and associated com-
puter programs to the U.S. Government is with “Re-
stricted Rights.” Use, duplication, or disclosure by the
government is subject to the restrictions set forth in,
subparagraph (c) (1) (ii) of the Rights in Technical Data
and Computer Software clause of DFARS 52.277-7013.
For non-U.S. Government use:
These programs are supplied under a license. They may
be used, disclosed, and/or copied only as supplied under
such license agreement. Any copy must contain the
above copyright notice and restricted rights notice. Use,
copying, and/or disclosure of the programs is strictly
prohibited unless otherwise provided for in the license
agreement.