User guide

WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 86
Fastrack Xtend User Guide
Troubleshooting the Fastrack Xtend
11.2. Receiving “ERROR”
The Fastrack Xtend returns an “ERROR” message (in reply to an AT command) in the following
cases:
 The AT command syntax is incorrect. In this case, check the command syntax (refer to
document [7] Firmware 7.4a AT Commands Manual (Sierra Wireless Software Suite
2.31)/Firmware 7.4 AT Commands Manual (Sierra Wireless Software Suite 2.30) for more
information).
 The AT command syntax is correct, but was transmitted using the wrong parameters
Enable the verbose error report method to see the error codes associated with the command syntax.
 Enter the AT+CMEE=1 command in order to change the error report method to the verbose
method, which includes the error codes.
 Re-enter the AT command which previously caused the reception of an “ERROR” message in
order to get the Mobile Equipment error code.
When the verbose error report method is enabled, the response of the Fastrack Xtend in case of error
is either:
 +CME ERROR: <error result code>
or
 +CMS ERROR: <error result code>
Refer to document [7] Firmware 7.4a AT Commands Manual (Sierra Wireless Software Suite
2.31)/Firmware 7.4 AT Commands Manual (Sierra Wireless Software Suite 2.30) for more information
on the error result code description and further details on the AT+CMEE command.
Caution: It is strongly recommended to always enable the verbose error report method to get the Mobile
Equipment error code (enter the AT +CMEE=1 command).
11.3. Receiving “NO CARRIER”
If the Fastrack Xtend returns a “NO CARRIER” message upon an attempted call (voice or data), refer
to the following table for possible causes and their corresponding solutions.
Table 70. Receiving a “No Carrier” Message
If the Fastrack Xtend
returns
Then ask
Action
“NO CARRIER”
Is the received signal strong enough?
Refer to Verifying the Received
Signal Strength to verify the
strength of the received signal.
Is the Fastrack Xtend registered on the
network?
Refer to Verifying the Network
Registration to verify the network
registration.
Is the antenna properly connected?
Refer to section 5.2.2.2 Antenna
Specifications for more information
about the Fastrack Xtend‟s antenna
requirements.
Is the band selection correct?
Refer to Switching Bands for more
information about switching
between bands.