Sierra Wireless DART 200 CDPD Modem - Manual (Page 28)

DART 200 CDPD Modem User’s Guide 2 Installation and Setup
Sierra Wireless, Inc. 2-4
Troubleshooting
The DART 200 is thoroughly inspected during manufacturing. There are
no end-user access items within the case of the modem. If problems
occur, check the following:
• Power supply
If the Power On/Registration Indicator is not flashing or glowing
solid red, check the power source for adequate voltage. The modem
requires regulated 12 V DC at 2.5 A. If the power is marginal it can
be the problem. Check the fuse (if any) in the power source, and as a
final test use a voltmeter to check for an open cable.
The DART 200 draws up to 2.5 amps under maximum power output.
The power output is a function of the modem’s distance from the
Mobile Data Base Station (MDBS). It is possible for the modem to
work well with a particular power supply in a location requiring low
power output (low current draw), and yet to fail using the same
power supply in a location requiring a high power output. Check the
amperage rating of the power supply to verify that it is adequate for
all situations.
• Channel acquisition
If the modem does not acquire a CDPD channel (fast blinking or
solid red light), refer to Channel acquisition, p. 2-10, for guidelines
on how to proceed.
• Registration
If the modem does not register refer to Registration, p. 2-15, for
guidelines on how to proceed.
• Unsuccessful data transfer
If the unit registered, but application data transfer is unsuccessful,
check that the RS-232 cable is properly attached. If that does not
correct the problem, substitute a good RS-232 cable (known to
work). If that does not work, you may have a flow control problem.
Refer to Flow control, p. 8-12, for guidelines. Also, review the Dial
command (ATD) in Appendix F, DART AT Command Set, Auto
Answer setup, p. 8-11, and Setup options, p. 5-17 or Basic UDP
setup options, p. 5-4, setup options as appropriate.
? ?
NOTE:
To aid in
troubleshooting use an
IBM-compatible PC
with an ASCII terminal
emulator, such as
Procomm, Terminal,
Kermit, Hyperterminal,
or a Mac with White
Knight.