User guide

WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 85
11. Troubleshooting the Fastrack Xtend
This section of the document describes possible problems that might be encountered when using the
Fastrack Xtend and their corresponding solutions.
To read about other troubleshooting information, refer to the Knowledge Base page at
http://www.sierrawireless.com/en/Support/knowledgebase.aspx.
11.1. No Communications with the Fastrack Xtend
through the Serial Link
If the Fastrack Xtend does not answer to AT commands through the serial link, refer to the table
below for possible causes and their corresponding solutions.
Table 69. No Communications with the Fastrack Xtend Through the Serial Link
If the Fastrack Xtend
returns
Then ask
Action
Nothing
Is the Fastrack Xtend powered correctly?
Make sure that the external power
supply is connected to the Fastrack
Xtend and provides a voltage within
the range of 4.75V to 32V.
Is the serial cable connected at both
sides?
Check the serial cable connection.
Does the serial cable correctly follow the
pin assignments? Refer to section 5.1.2
Serial Interface for more information
about the serial cable pin assignments.
Connect the cable by following the
pin assignments as given in Table
14 Serial Connector Pin
Description.
Nothing or non-significant
characters
Is the communication program properly
configured on the PC?
Ensure that the settings of the
communication program are
compatible with the settings of the
Fastrack Xtend.
The Fastrack Xtend factory settings
are:
 Data bits = 8
 Parity = none
 Stop bits = 1
 Baud = 115200 bps
 Flow control = hardware
Is there another program interfering with
the communication program (i.e. conflict
on communication port access)?
Close the interfering program.